NEW Shimano GRX 12-speed gravel group: details and ride impressions
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- Опубліковано 8 лип 2024
- Shimano's latest GRX gravel group jumped to 12 cogs in the back and comes in two different 1x configurations and a 2x build with two cassette options.
I dig into how this compares to SRAM and Campagnolo's gravel options, what I love, what bugs me, and what I'd like to see added into Shimano's mix.
* Save 20% off a Stages power meter with the code THERIDE at www.stagescycling.com. *
0:00 intro
2:53 history
6:59 what's new
10:51 SRAM v Campy v Shimano
12:44 what's best
16:16 what bugs me
17:54 ride impressions
19:57 what's coming
21:54 summary
22:38 bloopers
* Save 25% on Feedback Sports stands and tools through Sept. 15 with the code THERIDE25 at feedbacksports.com/ *
Prices and weights of 12spd GRX:
RX820 1x with 10-45 cassette
Weight (g) MSRP
Right lever and brake 943.2 pair $444.99
Left lever and brake $384.99
Crankset with 40 or 42t ring 655 $249.99
Rear derailleur 288 $126.99
Rotors 228 $121.98
Cassette 461 $164.99
Chain 247 $48.99
Total 2822.2 $1,542.92
(dropper lever add $30 and 66g)
RX820 1x12, 10-51
Weight (g) MSRP
Right lever and brake 943.2 pair $444.99
Left lever and brake $384.99
Crankset with 40 or 42t ring 655 $249.99
Rear derailleur 290 $126.99
Rotors 228 $121.98
Cassette 470 $164.99
Chain 247 $48.99
Total 2833.2 $1,542.92
(dropper lever add $30 and 66g)
RX820 2x12, 11-36
Weight (g) MSRP
Right lever and brake 1009.5 pair $444.99
Left lever and brake $441.99
Crankset with 48/31 rings 721 $249.99
Rear derailleur 270 $126.99
Front derailleur 95 $61.99
Rotors 228 $121.98
Cassette 391 $87.99
Chain 247 $48.99
Total 2961.5 $1,584.91 - Спорт
Things that keep me coming back to Shimano in my limited experience, the ergonomics work better for my hands, the brakes feel superior, and everything in general just feels a little more polished.
100%. I’d still ride late 80s dura-ace.
I agree. Having had Campy in the past, currently have SRAM Force on my road bike, and various iterations of Shimano on many different road bikes, mtb's and gravel bikes, Shimano just feels more precise and refined, better engineered, and has generally worked flawlessly over many thousands of miles. Shimano will always be my preference.
@@trent7919 Same
Shimano does actually produce a dropper post marketed as the "Pro Discovery" dropper. I have used on my gravel bike for 2 years and it's been flawless.
Thanks for the correction.
I got it too but haven’t used it yet.
I'm just here for the JOM/BD collab intro 😆
I had to pay a pretty penny for that celebrity cameo.
+1
WELCOME TO THE RIDE WITH BEN DELANEY.
@@GravelCyclist the check is in the mail.
Haha - love me some JOM.
Thanks for always doing a thorough, professional job.
Great video as always! Thanks for putting the Stages code in the description. I was needing a new power meter for my dream build I'm getting built up now.
Love how you break everything down into digestible bites for newbs like me...thanks!!
My goodness, the last couple minutes are hilarious. Someone make this man a shifter display 🤣
Turns out, it's a lot easier to put a complete bike in a stand... That said, I'm pretty proud of that ending.
Great video as always .
Watched the whole thing without any skipping, which never happens with this type of content. This is a compliment, by the way.
To my mind, 11s was/is a handicap for GRX. I’m glad to see them address it, but the the people want Di2!
I beg to differ. We know what they say about "opinions" but I'm pleased as punch with 2x 810 (11-40 cassette), and I could skip 12s entirely...
Great video! Thanks for doing this. Living in Bend, I recognize those places you were riding. Some great riding in this area.
The Ride down that last hill was freaken awesome! 🌞
Waiting on the full review. Hoping soon
Love the addition of the blooper section.
Nice to see you in Bend. I instantly recognized those trails.
Your gear reviews are always grxat!
Love your videos Ben, keep up the good work
Thank you.
BD - you are just prolific cranking out new videos these days, seems like a new one almost every day.
Appreciate you keeping me up to date on all the latest and greatest, but I'm really happy with my 11 speed Di2 (2X). Don't feel like I'm missing anything, don't need 12 speed, just like I won't be looking at 750D wheels.
If you can't be good, you gotta be busy... :-)
Yeah, ain't nothing wrong with 11spd Di2. And Shimano will be supporting that for a while.
That outro is priceless. I don't race and my fitness isn't what it should be, so I'm typically looking for low end. I like the Shimano BB design, preferably non-pressfit and T47. That stated, I've used Shimano cranks with what is otherwise Campag Ekar (9-42t, Checkpoint SL5) and SRAM AXS (10-52t, Checkpoint ALR4) drive trains with good success. The 'glue' ends up being the chain ring, which is Ratio (36t) for the Campy and Wolftooth (40t, 42t) for the SRAM. I like the Garmin power pedals with the Campag and Stages double-sided on the SRAM. I also appreciate that with a little internet research I can find 3rd party parts to mix and match to get what I need. I want this new mechanical Shimano GRX group set for my ALR4. Thanks for sharing your experiences!
Brian, great video and comparison to SRAM’s offerings. Loved the outtakes!!😂
Come on Shimano, help us out here! Di2!!!! Another great review, Ben!
Looking forward to seeing if the revised GRX 2x still plays well with larger cassettes. I currently run a 11-40 on my GRX 2x and having a 10-44 with a 46/30 up front would be a great climbing setup.
not only climbing i am a 106 kg i realy need a 40 or 42 cassette ! i realy dont understand why they dont come with a 11-40/42 cassette it would be perfect for consumers (i think)
Di2 baby! I’m waiting…
Loved the video you did a good job of presenting everything. Good enough that now my twin is interested in upgrading to this instead of MicroShift Sword.
Great video. Really enjoyed the blooper reel at the end😂.
Here to serve!
Nice to see the production upgrade, multiple camera angles and nice lighting. 👏👏👏
Thank you. It's a work in progress for sure.
Got tired of waiting on 12s Di2, bought an Endurace CF7 105 Di2. Guess I'll keep waiting for Di2 version.
Good info.
12:20 Apex 😉
Eagerly awaiting a GRX 12 speed DI2.Hoping for wireless instead of less wires.
Mullet out of the box. Nice.
Those GRX levers on the bench certainly know the new trend of leaning levers at extreme angles! 😂
the best part was the falling levers at the end lol
Nice video man. If you're a one man squad props. Sick quality
Thank you. I am indeed a one-man band. I appreciate you watching.
Agree on chainring. When I see 40T on a gravel bike I'm like whaaaat!?
I use Garbaruk rings and don't care what manufacturers do. And the time it will get to customers/builds/stock there will be plenty of options.
Btw I used x12 chain on a regular chainring (x11) works fine. Try any ring you have.
Hooray for ultra-sonic cleaning.
Really happy with my 2 x 11 shimano GRX on my Topstone gravel bike .I can ride road events and most MTB areas .I also have Shim Di2 and sram eagle on other bikes .My best MTB groupset was also a 2 x 11 .Don,t see the need for this 1 x 12/13 setup anymore .The casettes are way to exspensive to replace .My new Shimano GRX 11 speed cassette costs 10% of a sram eagle one and i prefer to stand and cycle in a larger gear at the back and not murder a 10 cog eagle cassette .Long live Shimano 2 x 11/12
Love the out takes.😂
I was hopping to see a 11-45 12 speed cassette with 1 tooth jumps on the 3 smallest gears. Sram released something like this in their xplr line.
Awesome
I was hoping this group would be available soon. I currently ride GRX one by with a Wolf Tooth 38 tooth front ring. Not having a big front ring doesn’t bother me. For the racers they can go with an Ultegra crank. I also prefer mechanical shifting. I don’t think electronic shifting makes a huge difference on the rear. For adventure riding mechanical makes for one less thing that needs charging. It’s also less expensive to replace in the event of a crash. 1 x 12 mechanical is my group of choice.
38t is still big; I recently switched from 38 to 34t single ring. Guess what, I'm still not using the 11t cog.
Sorry if this has already been pointed out in the comments but I believe that it's actually the 2x option which can be accomodated by the 11 speed body and not the other way around.
Cheers, I screwed that one up a bit.
I strongly relate with the outtakes in this video at work today. 😂
Agree with the 42t 1x chainring. That will not work in local varied terrains and gradients of various lengths. Spun out 42x11 with 11-36 rear on a rival 1 setup on long descent as the group rode away. Also overgeared on the long canyon climb. So will need 2x the but rear gearing is too high from shimano to buy as is. Will have to modify the shimano gearing a bit to work for me. Or just buy sram rival axs which has what said with all the sram options. But love the new shimano wheels.
GRX crank arm spacing is 151mm and road is 147mm.
Very nice video!
How about the mentioned update-video? :)
AWESOME! I often feel like an old man riding 2x 11spd Shimano GRX around Denver. That stuff just works! I have SRAM force on my road bike....SILLY! What was I thinking!
Not that I disagree, but, what do you dislike about Force on your roadie?
@@thedownunderverse I personally get a lot of chain drop shifting to my big ring. It has to be in just the right gear in my rear cog, and that changes daily. I’ve looked DEEPLY into it but no cigar. Also, I feel the ratios just are not as nice as Shimano. It’s all personal preference, and I’m probably biased as I’ve been riding Shimano for decades.
@@patrickseibold3829 Agree on all counts. I’m also not a fan of toxic DOT as I wrench my own bikes. I chose 105 Di2 (with Ultegra Di2 shifters, for the Servo Wave, hood buttons, satellite ports and warm to touch lever) and it’s absolutely sublime.
@theridewithBenDelaney are you waxing chains now? (noticed the ultrasonic cleaner on your bench).
Nice to see that they are still supporting mechanical shifting. But I will stick with my 11-speed 105/Ultegra gravel setup.
Having wasted a lot of time and money on exchanging 105 hoods(broken internals) and lots of gear cables, I can’t wait to get rid of mechanical
Really like Shimano stuff, especially the brakes but man do I love my new xplr axs 1x set up on my checkpoint.
Cool. Which ring on the 1x?
@@TheRidewithBenDelaney Staying with the 40t. Perfect for what I do. No worries about spinning out going downhill. Going fast enough without pedaling 😂.
I never know what model of GRX is the more premium. Unlike Dura-Ace, Ultegra, 105... GRX is just all GRX and if you look at part numbers sometimes it will have a 400, 800 but even on their GRX page they don't say anything about 400,600,800. They just have how many speeds in the rear cassette and whether it is Di2 or not. I was looking at a bike at the shop and both models had GRX, I only could assume that since one bike was more expensive than the other... that GRX was "lighter?" Shimano needs to do a better branding and aesthetic distinction between their GRX tiers, because honestly it's all GRX to me.
My favorite gravel setup that I've used was GRX 46/30 with an 11-40 XT cassette. The range was great for long distance audax road rides and for steep gravel routes. Bummed Shimano didn't make an 11-40 GRX official cassette.
I run the same setup and love it, but with a 105 groupset. Shame that with the change to 12 speed I don't think there are any first party 11-40 12 speed cassettes you can buy
@@BoxCarBoy12 Why would you need 11-40 12 speed when you have a 12 speed 10-36 tup to 10-52 with a chainring starting at 30, all the way up till 56...?
All you have to do is switch from brand.. Wich should be a no-brainer on gravel and mtb already..
@@YannickLB Because I want a 2x drivetrain and I want all the low gears, even lower than 30-36t. And you can't use the 52t cassette on the 2x. And also because I have a lot of HG hubs and want to hold off on shelling out the money for microspline hubs compatible with 10t small cogs for as long as possible.
@@BoxCarBoy12pretty bummed with this too. Maybe they’ll release an 11-40 HG cassette whenever Di2 gets released.
11,12,13,15,17,19,21,24,28,32,36,40
That would be sweet.
@@BoxCarBoy12 I mean.. to each their own, but why would you want that low on gravel with 2x? Seems like a handicap.
I've got 2x 12 speed 46/35 with 10-36 and in my opinion i've got all the possible range I could need as far as my imagination goes.
I've done 35% climbs with it, and 80km/h without spinning out.
What more is their to have?
it annoys me that the don't offer a 165mm crank option in the 800 series.
What I really want is gravel 12-50(-53) cassette. A range of 10-44 but with small high gear ratio changes. I guess derailleur adjustment screws would allow for 12 tooth smallest cog.
11-50s are easy to find and you can throw a 12t cog on to replace the 11. As for clearing the 12t, youn may not have to adjust anything as clearing the 50 may mean you're fine on the 12 too.
Finally someone is saying it. Tighter range cassettes should not end on a smaller cog, they should start on a bigger one.
That ending was fantastic 😂
Ill hold out until a Di2 option is available, but im happy that 12 speed is finally out. Hopefully the hoods have been made larger like the new road 12speeds, as I have very large hands and the 11speed Di2 hoods are too small
I have 11 speed Shimano road, and SRAM AXS mullet and honestly, I’m leaning towards going Microshift Sword next because it’s 1/4 the price of GRX mechanical. If it was hydro it would basically be game over Shimano/SRAM in my opinion.
I haven't ridden Microshift in ages. Need to remedy that.
I'm waiting for a new bike with this 10-51 drivetrain and the new 750x40 tires/wheels.
don't forget your chain catcher this time
Dang I'm waiting on parts tocdo a mechanical XPLR build. I wanted the GRX stuff but it seemed iffy as to when that would be released. Really tempted to fall back on XPLR and build a 1x GRX. I have a 2x GRX 400 bike and honestly love it so wouldn't mind sticking with Shimano
Do it! Plus you’ll avoid toxic DOT
Ben, Assuming interchangeability between road and gravel groups, do you prefer Shimano road levers or the gravel levers? I don't think I have big hands though apparently the cycling industry does, and standard hoods seem small.
a 2x mech? New touring bike groupset maybe? Should have good climbing, and be a good upgrade to a sora setup I have atm
Do you know the pull ratios? Will these shifters work with the Shimano MTB 12s derailleurs?
I was wondering if some sneaky behind-the-scenes GRX testing was going on.
For an all-road bike that 48/31 with 11-36 seems like a good fit for range and cadence matching but they really should have come out of the gate with the Di2. The 1x should be at least finally comparable with SRAM, in fact besting their XPLR group unless you use a SRAM mullet setup but I think the steps are just too great to use on longer rides with mixed road or flats.
Perfect ratios.
Do we know if the new brake calipers are compatible with the 11spd grx brifters? Out of all the changes, the part that really perked my ears up was possible relief from rubbing chirping brakes as a big guy.
Small correction, Shimano does have dropper posts - Tharsis, Koryak and Discover afik
Ah, good point. Thanks for calling that out. It's just not packaged as part of the GRX group.
@@TheRidewithBenDelaney Nope, not specifically with GRX but e.g. Koryak has a 70mm Version for 27,2mm posts, perfect for gravel and specified by Shimano for as such (no serious mountain biker would like top be seen with either the small diameter nor the small extension according to the gnarly guys...)
Hey Ben! Off topic. Want to see you on a time adhx. I love and trust your reviews. (Got a giant revolt advance 0 on your recommendation, and it has not disappointed. I LOVE this bike!) Im always looking for the next bike, and am very interested in the adhx. Please check it out when you can 👍
any facts on cable pull specs? will the new RD's shift shimano drivetrains setup with 810 11 spd shifters?
Can you put Shimnao MTB derailleurs on GRX shifters (same pull ratio)? HG Free hub body no longer work with my existing I9 torch hub?
I’m hoping the new 12 speed DI2 GRX will be semi wireless
Still no post mount brake calipers! I have a Post Mount and a flat mount on my CaadX. It would be nice to buy both GRX calipers instead of an MTB caliper on the front and GRX at the rear.
JOM sighting... outstanding.
Not sure if the 12sp really is much more than an evolutionary step and certainly not going to rush out and retire my current GRX 800. Might help on the pricing come the next time.
Thanks for the details Ben
I have been totally impressed with the HG+ shifting on XTR. Really psyched to get the 12 speed GRX 10-45 on my gravel bike, with a 44 T ring (I run a Red crank for the power meter, and aftermarket 12 speed HG+ compatible rings are available). One question: is the cable pull for the mechanical group here now the same as with the MTB stuff? If so this would allow the option of using XT or XTR derailleurs... Would be nice to know.
+ 1 on the pull ratios. Would be glorious to mix and match stuff like in the days of 9 speed.
My understanding is no…
Same question here.... Are the new Shifters compatible with mtb rear derailleurs... It would be nice to have a XTR rear mech to save some weight and get better precision...
Further research has confirmed that GRX 12 speed mechanical is using a different cable pull ratio from Shimano MTB 12 speed system, so one must use GRX derailleurs with gRX shifters... Oh well...
Yep, as @barrowsworm1226 said, they are not compatible. From Shimano: GRX uses the Shimano road pull ratio and XTR is MTB pull ratio.
Any chance we can see the route/ride course? Scenery looks beautiful 😊
Yeah, of course. All my rides are on Strava.
www.strava.com/athletes/ben-delaney
www.strava.com/activities/9655081823
What is the blue bike in the background?
@TheRidewithBenDelaney are you waxing chains now? (noticed the ultrasonic cleaner on your bench). Could be a good video on the practicality of doing regularly. Also isn’t that garage cold with no insulation in Boulder?
Seems like shimano has carved out the lower segment of gravel groups, while SRAM has the higher end. Makes sense why they only have mech for now.
So, how's 1x treating you ?
I have changed recently on the gravel bike, and chose the ring size to maintain lowest gear, and had a slight drop in highest gear (no real issue) but the 2 tooth jumps really bugs me when on fast sections ...
Thinking about mixing and matching with other cassetes to get smaller jumps there.
I don't mind any of the other gear jumps, and as a whole 1x works better for me, as most of the time I use the middle range, so no need to change chainrings on bumpy stuff is definetly a +.
Any insight on RD max tolerance- I ran my grx 600 46/30-10/42 no problem with a loaded bike often climbing fairly rough terrain. The 1x option looks good but I’m hesitant to let go of the 2x I often use my bike for road riding as well.
There are two cage lengths for the 1x - 46 and 51t max, respectively. I hear you on the 2x - that is still my preference for GRX.
Di2 GRX 12-speed is in the making, Shimano confirmed it.
Yep, they just won't say when.
What are the shifter options for flat bar bikes? Could you speak in terms of gear range than teeth? That makes more intuitive sense.
Are the brakes new from previous 11speed GRX? Also, anything other than GRX 11speed crankarm are compatible with 12speed GRX?
Brakes are new. Calipers snuck in with the limited edition silver GRX, but are basically new.
GRX rd with road fd and road crank 50/34 ftw
Ben, DI2…. Any ETA? In your opinion?
What is the point in 1x setup 40 chainrings and 51t cassette when you can go lower on a 2x setup with 46/30 and 11-40cassette? At the same time your highest gear will also be higher. What is the point?
Where is that road or path at the end of the video? 🤩
Bend, Oregon.
Shimano do dropper post options under their PRO brand.
Also - isn’t the freehub for the 2x set up not the same freehub they’ve used for years? The Road 11spd HG freehub?
Yes, thanks for the PRO correction. The 2x hub is new.
@@TheRidewithBenDelaney but at least to my understanding, you can mount 12 speed road cassette on a 11 spd HG freehub with a spacer?
I wonder what the gearing difference is with this new 10-51 compared to the XTR 10-51. The XTR is lighter by quite a few grams...........
At those prices they can keep'em.
I feel like I'm missing something. Are there ANY wheels out there (besides these brand new Shimano ones) that have 142mm microspline hubs? How do they expect anyone to spec this on gravel bikes when their hub is only available on mountain bikes? Who can actually install this right now on a drop bar bike without having to replace their wheels? Genuinely curious.
DT Swiss has a freehub body coming and I've asked ENVE and a few others but haven't heard back.
The rotors aren’t new?
Ben, great review and honest feedback on this release. Question: is that 10-51 cassette just an XT/XTR cassette or something new specific to GRX?
Also, while I appreciate 12 speeds (from Shimano) now being offered to the masses for gravel bikes, I'm sticking with 11spd GRX Di2. It's easily my favorite groupset that I've used. As well as XT is set up on my mountain bike, it's rare that I'll ride that and not wish it was Di2.
Thank you. The 10-51 is a Deore XT. Good question.
Street price on this is about 20% higher than Ultegra Di2 street price ...
Like you said the 2.5mm extra on the Q-factor on gravel groups allows wider tyres, however Shimano thinks anyone riding gravel, at least at the top tier doesn't deserve any cranks shorter than 170mm. Stupid, especially considering studies showing the benefits of shorter cranks, and of course people like my 5' 2" wife are just screwed if they want to keep a whole groupset.
Whole groupsets are overrated. Just get the parts that are best for your needs. Like the guys who want higher gearing buying the Ultegra cranks. I wanted better shifting under load from my SRAM drivetrain so I bought Shimano HG+ cassette & chain. No big deal
Is the coating on the levers different from the 11-speed version? I was not a fan of that stuff at all. Way too fragile and you can just tell in about ten years it’s gonna degrade into a sticky bummer.
I really miss Bend. Watching this video reminds me of the smell of pine tree.
A few questions - Assume the cassettes are XT MTB 10-51 and 10-45 cassettes? Not sure if you explicitly said -the 2X option is 12 speed - if so I think this is a big miss that they should have an 11-40 rear for us less fit riders. Finally - is the pull on the cables the same as 12 speed MTB?
Yeah they are. Those 10-45t versions that seems useless to most MTB riders who went with the 10-51t just got more valuable now that they are shared between MTB and gravel/road groups.
11-40 works with the 11s grx810...just need to adjust the b screw...I have the 46/30 11-40 setup on my checkpoint...works fine...
Agreed -I have tried an XT 11-40 on my Argon 18 Dark Matter - I get into a chain length issue on the lower 11 tooth cog with the proper chain length for the 40 tooth. Just not enough tension. Would like them to make a 12 speed 11-40 to give you that go anywhere 31x40@@andrewmandich5906
It seems as though the 11-32 cassette is not made for Shimano 12 speed. This eliminates my perfect everyman gravel gearing of 46/30 and 11-32. I know 48/31 and 11-34 is very close but the cassette, chainrings and chain are heavier.
What is the new 12 speed free hub for the 2x setup? This is the first I've heard of it.
There's a 27sec video here that shows the Micro Spline (for 1x with a 10t) and the HyperGlide L2 (the 12spd 2x road for an 11t)
bike.shimano.com/en-EU/product/component/grx-12-speed_lp.html
Thank you for the reply! I couldn't locate the video at that link. I'm sure it's on my end. My only concern is whether the Hyperglide L2 is backward compatible with the previous 11 speed HG. I believe it is, but just trying to confirm. Thanks!
@@CrabgrassFarmer No, it is not.
Yikes! I've got a 2x12 groupset on order. I thought the freehub on the 2x groupsets was backward compatible, that's the best info I could find, and it looks like it should be. Do you have a link to something saying it isn't backward compatible? Sorry, I'm not trying to put my homework on you, but this is a bit foggy out there. Thank you!
@@CrabgrassFarmer Sorry, I misunderstood your question. The 12spd group (and casssette) will work on 11spd wheels. So you are all set.
You just can't put an 11spd cassette on the L2 freehub.
Why do you say the rotor is new? It looks like their current second level XT MTB model… just curious.
The new rotor is a CL800 with a curvy black carrier. Confusingly, I've just got the MT800s there in the video. Sorry for the confusion!
12speed mechanical? Goodluck fine tuning that and keeping it tuned!
I am running a 13 speed mechanical. It is running fine.
why that should be an issue? Finetune a 11speed or 12speed, no matter...
@@hellebarde1450 smaller spacing between gears, the faster it goes out of tune
@@twillyspanksyourcakes Makes sense... well, one need do it more regularly then. Probably it's more comfortable then with the coming Di2 version... :)
So the 12 speed cassette for 2 by gives the same range as my 9 speed Sora. Well done, well done. And since it is 12 speed, this means it takes longer to get to 36 lol. Love the video but thanks, I will stick to 9 speed.
Gear gaps with 9sp are atrocious. 1x12 has nearly the same gaps you get with 2x9
You clearly do not understand the benefit, so obviously it‘s not for you
@@veganpotterthevegan Off road gear gaps are meaningless. I never shift just one at a time. Fewer gears are more efficient if you're not 10-ply sensitive to cadence.
@cjohnson3836 they mean less mountain biking. They're still important on gravel. If course, everyone has different wants. I'd honestly love to have a 10-50 14sp cassette because those gear gaps definitely matter to me.
@cjohnson3836 no idea how fewer gears are more efficient. Nobody produces the same power with similar heart rate with a 20rpm cadence change😅
Call me crazy, but I'd like to pair the 2x chainrings with the 10-51 cassette. Somebody clue me into why that's not an option. We don't all have the legs of Pidcock or MVDP, you know!
Derailleurs don't have the capacity. Assume 46/30 chain rings. That's 16t differential + 41t differential for the cassette. Makes it 57t in total differential. Too much for derailleurs.
Its a shame they didn't fix the 2x crankset ratios. 48/31 still makes no sense, too long and too short at same time. We need a 44/34 or even the good old 46/36.