I do love my current 11spd GRX Di2 so not sure if I would seek out the 12spd unless I was shopping for a new bike. Have been a Shimano guy since the 90s for both road and gravel. That said, I got a new road bike this spring which has Sram Force AXS and Quarq powermeter. It is darn sweet with the exception of the FD. Oh the dilemma next time I go bike shopping. Thanks JOM.
From Oz … like other comment, I imagine the larger cassette will work ok. I hope so. As an older cyclist with hills in mind, lbikepacking/ touring still on the agenda, lower gears are important!
Hmm. I have the GRX 12 speed 1x driveline with the 10~51 cassette, I chose mechanical because there was no Di2 option. But now that the Di2 12 speed is out, I imagine I could use the GRX 12 speed Di2 shifter with an XTR 9200 series Di2 12 speed SGS derailleur (I'm using a XTR cassette). I have a couple of bikes using Dura Ace Di2 derailleurs with XTR shifters, so I imagine a GRX/XTR hybrid bike is doable? I prefer the 1x driveline over a 2x.
I would imagine what you are asking is possible, as I have done it using the XTR Di2 11 speed rear derailleur. However, the 12 speed version has not been officially launched.
According to the Shimano dealer manuals the RX825 shifter levers cannot be wired to the rest of the system, but it appears the RX825 rear derailleur can, presumably with Dura-Ace or Ultegra shifters - maybe even cable brake ones. (There are numerous documents though and finding things out is painful.)
I relayed what the Shimano product development team shared with us. No way am I going to run this system wired, but it would be interesting to know what works, and what doesn't.
Shimano will hopefully drop the 11-40 (or 42)cassette in HG format as part of their 1x release. They’ll want to split the difference between the 11-36 and the 10-45, pretty glaring omission. I think an 11-41 would be kinda cool. 11-12-13-15-17-19-21-24-28-32-36-41
All my bikes are shimano mechanical, how long does the battery powering the rear and front derailers last and how do you charge it? Do you need to remove the seatpost to charge?
Battery life will depend on shifting load, more so with the front derailleur. However, around 3 months is pretty standard based on average riding. I showed the charging port in the video, it is located at the back of the rear derailleur. No removing a seatpost to charge.
Odd decisions from Shimano. Not offering a 1x setup and a max cassette of 11-36. SRAM must be rubbing their hands. OK, it's in the works...why is it taking so long?
Have to agree. I was hoping for an 11-40. Regarding 1x Di2 12-speed, I was thinking Shimano would have delayed the launch of GRX Di2 overall to launch both at the same time. I expect we'll see the 1x variant in a few months?
Hard pass on 1x and mullet :) Regarding mixing / matching Di2, I've only tinkered with the original XTR Di2 11-speed (still got those derailleurs, so so good), and the wired road shifters (the original RS785 Di2 hydro lever). They work perfectly together, just ensure the firmware is up to date, etc.
@@f1hotrod527 Cassette gaps drive me nuts, dude, especially if I am riding in a group. Admittedly, I don't notice them so much riding solo. I am sure we'll see 1x 14 speed in the near future, then I may come to the Dark Side 😄
No short crank options. No PM. No 11-40 cassette. NOT an upgrade to my GRX 11-speed with a 11-40 cassette. With a wide range cassette my group is like having two 1x systems. Very disappointed.
Really? Whats the problem? You do not have to use a GRX crank. Right now I use a SRAM RED crank with power meter with GRX 12 speed mechanical, and a XTR 10-45 cassette, works great with the right chainring. Shimano power meters are terrible anyway (although I do expect them to get this right at some point). GRX electronic will have wide range cassettes soon as well, with the 10-45 and 10-52 cassettes.
@@tonyg3091 100% on this configuration. I bugged Shimano about this during the mechanical 12 speed GRX camp as well. I much prefer 46/30, 46x11 is a large gear, especially when you factor in larger tyre casings. I really hope they offer an 11-40 sooner rather than later.
@@GravelCyclist I am on 46/30 to 40t cassette mechanical on my gravel bike and it is simply unbeatable. Gravel bike heaven. Trumps all SRAM mullets with 40t chainrings- lower bottom gear and higher top gear. Can climb up walls and at the same time is no slouch on flats. It really beats me why Shimano cannot see how perfect this is.
The hoods are uglier than the 11spd ones. The front derailleur looks like the 11 speed one. Ultegra 12spd cranks and front derailleur looks so much sleeker.
I’m glad you like my bike build. Happy it came out good.
Justin! Thanks so much for putting everything together!! The bike has been perfect.
That Framework bike 😍🤩😍
Review coming later!
Great looking bike 👍
@@GravelCyclisthave you reviewed the Litespeed Ultimate G2 Jom???
Awesome groupset display and info,looks excellent on the Framework frameset,love the alloy lugs and carbon tubes.💯👌🏻✌🏻🚴♂️
I do love my current 11spd GRX Di2 so not sure if I would seek out the 12spd unless I was shopping for a new bike. Have been a Shimano guy since the 90s for both road and gravel. That said, I got a new road bike this spring which has Sram Force AXS and Quarq powermeter. It is darn sweet with the exception of the FD. Oh the dilemma next time I go bike shopping. Thanks JOM.
From Oz … like other comment, I imagine the larger cassette will work ok. I hope so. As an older cyclist with hills in mind, lbikepacking/ touring still on the agenda, lower gears are important!
Ian, at this time, I am unaware of a third party 11-40 12 speed cassette.
I have XT on my bike with a 135mm hub. I prefer it as I don't use wider than 35mm tyres. GRX is way to limited for me.
Hmm. I have the GRX 12 speed 1x driveline with the 10~51 cassette, I chose mechanical because there was no Di2 option. But now that the Di2 12 speed is out, I imagine I could use the GRX 12 speed Di2 shifter with an XTR 9200 series Di2 12 speed SGS derailleur (I'm using a XTR cassette). I have a couple of bikes using Dura Ace Di2 derailleurs with XTR shifters, so I imagine a GRX/XTR hybrid bike is doable? I prefer the 1x driveline over a 2x.
I would imagine what you are asking is possible, as I have done it using the XTR Di2 11 speed rear derailleur. However, the 12 speed version has not been officially launched.
After ditching my front mech I enjoy my bike even more.
@@Leo-gt1bx I still have my front mech and enjoy my bike no matter what is there, or not.
😂 perfect timing just fitted it on my Time ADHX45
The Framework frame is worthy of comparison to the latest Colnago C series. It is beautiful. But the name is not that original.
According to the Shimano dealer manuals the RX825 shifter levers cannot be wired to the rest of the system, but it appears the RX825 rear derailleur can, presumably with Dura-Ace or Ultegra shifters - maybe even cable brake ones. (There are numerous documents though and finding things out is painful.)
I relayed what the Shimano product development team shared with us. No way am I going to run this system wired, but it would be interesting to know what works, and what doesn't.
Shimano will hopefully drop the 11-40 (or 42)cassette in HG format as part of their 1x release. They’ll want to split the difference between the 11-36 and the 10-45, pretty glaring omission. I think an 11-41 would be kinda cool.
11-12-13-15-17-19-21-24-28-32-36-41
All my bikes are shimano mechanical, how long does the battery powering the rear and front derailers last and how do you charge it? Do you need to remove the seatpost to charge?
Battery life will depend on shifting load, more so with the front derailleur. However, around 3 months is pretty standard based on average riding. I showed the charging port in the video, it is located at the back of the rear derailleur. No removing a seatpost to charge.
Why such a short seat tube on a custom bike??😫
Sloping top tube.
Lol that is high in my book
Can you shift all the way down to the 11 cog in the small chain ring like you can on the 12 speed road group??
On this system, negative, same restriction as with 11 speed GRX Di2.
@@GravelCyclisti cant believe shimano blocks this “gear control” feature in software in 105/ultegra di2. How lame
I’m wondering if the 1x will be wireless not semi wireless
It will
I've got a semi, and i'm wireless. 👍🏿
Noice!
I’m still smarting over the fact my Chris King hub won’t take a 12 speed cassette (forcing a 450$ aud freehub swap)..
Seriously? Not good news. A Shimano 12 speed cassette works no worries on a typical 11 speed HG compatible hub body, but not for Chris King?
@@GravelCyclist Doesn’t work on the CK stuff…no probs re the DT 240’s…
Odd decisions from Shimano. Not offering a 1x setup and a max cassette of 11-36. SRAM must be rubbing their hands. OK, it's in the works...why is it taking so long?
Have to agree. I was hoping for an 11-40. Regarding 1x Di2 12-speed, I was thinking Shimano would have delayed the launch of GRX Di2 overall to launch both at the same time. I expect we'll see the 1x variant in a few months?
That group set costs twice what my bike did. 😂😂😂
Not sure it was meant for a gravel bike at least one that has to make some steep climbs. 🤷♂️
If its not 1X and mullet, it doesn't matter. ;) Does Shimano have compatibility between the road bike di2 and mountain bike di2?
Hard pass on 1x and mullet :) Regarding mixing / matching Di2, I've only tinkered with the original XTR Di2 11-speed (still got those derailleurs, so so good), and the wired road shifters (the original RS785 Di2 hydro lever). They work perfectly together, just ensure the firmware is up to date, etc.
Do not worry, 1x and mullet will be available for sure, just as it is with GRX 12 speed mechanical.
Yes, I alluded to that in the video. Under development.
@@GravelCyclist Come to the dark side my man. feels good having that 52 tooth dinner plate out back. Let the front derailleur die.
@@f1hotrod527 Cassette gaps drive me nuts, dude, especially if I am riding in a group. Admittedly, I don't notice them so much riding solo. I am sure we'll see 1x 14 speed in the near future, then I may come to the Dark Side 😄
No short crank options. No PM. No 11-40 cassette. NOT an upgrade to my GRX 11-speed with a 11-40 cassette. With a wide range cassette my group is like having two 1x systems. Very disappointed.
Yeah, SRAM seems to be pulling away. I’ve been racing gravel in the SE US for two seasons now, and now the majority of bikes I see are SRAM AXS.
Really? Whats the problem? You do not have to use a GRX crank. Right now I use a SRAM RED crank with power meter with GRX 12 speed mechanical, and a XTR 10-45 cassette, works great with the right chainring. Shimano power meters are terrible anyway (although I do expect them to get this right at some point). GRX electronic will have wide range cassettes soon as well, with the 10-45 and 10-52 cassettes.
They absolutely should make 46/30 with 40t cassette. Do they know their customers at all?
@@tonyg3091 100% on this configuration. I bugged Shimano about this during the mechanical 12 speed GRX camp as well. I much prefer 46/30, 46x11 is a large gear, especially when you factor in larger tyre casings. I really hope they offer an 11-40 sooner rather than later.
@@GravelCyclist I am on 46/30 to 40t cassette mechanical on my gravel bike and it is simply unbeatable. Gravel bike heaven. Trumps all SRAM mullets with 40t chainrings- lower bottom gear and higher top gear. Can climb up walls and at the same time is no slouch on flats. It really beats me why Shimano cannot see how perfect this is.
I bet the bigger cassette will work.
I think so as well, but I'm unaware of an 11-40 12-Speed cassette at this time.
Might have to move to 12x142 microspline hub and a 10-45 cassette.
@@thecappy Someone needs to try this 😄 Wondering if you would need a Wolf Tooth Road Link as well?
It probably is technically a great group set but jeez is it the ugliest group set especially the crank
I was hoping Shimano would have updated the 12 speed crank versus reusing the 11 speed version with different chainrings for 12 speed.
The hoods are uglier than the 11spd ones. The front derailleur looks like the 11 speed one. Ultegra 12spd cranks and front derailleur looks so much sleeker.