Force to move shock is just a shaft area multiplied by IFP pressure. It has nothing in common with small bump sensitivity (after shock is loaded). On the other hand - If you want to have good sensitivity at first 1mm of travel then using too soft spring with added preload is counterproductive. Preloaded soft spring it is not the same as right spring for you. Especially progressive one (you lose even move small bump sensitivity). One more thing: DHX does not have HBO at all, not just "does not have external HBO externally adjusted".
I ran it with a perfectly preloaded 570 Sprindex. 600 lbs fox spring and none preloaded 520 in the video, no change on small bump. Even with the 520 cranked up to 570. I am aware of this formulas, but your also wrong, I dropped the IFP pressure to 100, from 150, also no change. I have another video on it, but this is for setup. The piston is massive compared to the X2. That is the friction. HSC is bottom out control as much as HBO is. Have it be not as pleasant. To answer your last statement. 🍻
@@OtterMTBtech dude it has no HBO - period. If you cannot feel a difference in a 520 and a 600 lbs spring, there might be some other problems going on and you should evaluate where this insensitivity is coming from. I can clearly feel a 50 lbs difference in spring rate on my shock on small bumps. And you should differentiate between static and kinetic friction. I like your channel, but this video is disinformative.
I am not an expert so I appreciate your input. 520- 570 spring no change in small bumps, Tightened it up to 570 because it rode better like that. I may have just been ruined by the EXT. I have ohlins shock has no small bump either.
@@OtterMTBtech again, showing you don't understand what you deal with. Sprindex doesn't preload your spring, it effectively shorten the spring by reducing the number of active coils, which increase the spring rate of the spring. In other words you spring curve starts at 0, no matter the setting of your sprindex. On the opposite, if you preload a spring with the shock's collar, this will shift the spring cuvre. If you add 75lbs of preload, that means that the shock won't move for any impact that doesn't create at least 75lbs of impact, which basically destroy any form of small bump sensitivity. As for the DHX2 vs DHX friction, the reason why the DHX has higher threshold is because it is a mono-tube design which needs high IFP pressure and a lot of IFP movement to function especially with a big shaft. On the other hand DHX2 is a twintube design, by nature if creates very little IFP movement and because it doesn't rely on shaft thickness to create damping at the base valve, it also benefits from less seal stiction due to the smaller shaft diameter. But all in all seal stiction isn't what is creating the bulk of the threshold you measured with the table scale.
Graphic at 5:35 says 1 turn adds 25lbs of spring rate. Spring rate is fixed at coil rate. Preload shifts the curve over but does not change the slope of force vs distance . Disagree with adding preload to prevent bottom out. Ideally you want just enough preload to keep the spring from rattling. I use one turn on my CC inline. I think that before assessing bottom out, you need to ride first and set your lsc and hsc. If you are still bottoming out easily with a prog spring after that, a coil shock is not for this bike.
I bought this shock for my Forbidden Druid about 4 months ago when it was on sale for dirt cheap. Right out of the box it had a noticeable knock/click while going over high speed chatter type stuff. Feels great but kind of annoying. I came across your other dhx video last week and saw you change the ifp pressure so i bought the adapter,checked mine and it was at 100psi. I pumped it up to the recommended 150psi and it felt like absolute garbage in terms of small bump sensitivity. My question for you is if I drop it back down to 100psi am I damaging the shock in anyway? And have you dealt with any sort of “clunk” with this shock? I read the float x had the same issue and was replace with a “no knock main piston” from fox. Thanks for the great videos 👍
It does have a risk of getting air and oil mixing with lower pressure, but the X2 runs a 100 Psi on the piggyback. Ext 55 psi. I didn’t hear any clunks, weirdly i found the the Float X ride fantastic, and DHX almost pure garbage, except in rocks gardens (Just got some float X) to make sure I was not tripping The only improvement was mentioned in video 2 clicks of lsc and progressive spring. Sluggish performance on anything but the chunk I have a friend with Orbea same results as me, stiff no small bump weird feel
As a bike mechanic and riding XL frames I have to emphasize NOT to measure sag seated! The seated measure is always way bigger than the only correct measurement in your preferred standing position on the trails. In addition to that: The longer the frame, the worse seated sag measurements get because most frames have a way too similar chainstay length across different sizes - also, there are flatter and steeper seat angles... Conclusion: Always measure sag in your personal, most comfortable trail riding position STANDING UP with knees and elbows slightly bent. This is very important for shock as well as fork sag.
Trying to find the right spring rate for my new YT Decoy MX. It came with the fox dhx shock with no adjustments like the one in the video. It’s a 450lb spring I’m around 175lbs kitted up. I need more support in berms and big hits. Any advice?
I have big issues with my dpx2, i m quite heavy 210 lbs and i don t know what to do should i upgrade or repair this shock. Mostly i d like a coil shock but which one?
For anyone looking for information on this shock it's probably best to look elsewhere. This guy might be correct in his assessment but he doesn't seem to have the required knowledge to be making such videos.
Force to move shock is just a shaft area multiplied by IFP pressure. It has nothing in common with small bump sensitivity (after shock is loaded). On the other hand - If you want to have good sensitivity at first 1mm of travel then using too soft spring with added preload is counterproductive. Preloaded soft spring it is not the same as right spring for you. Especially progressive one (you lose even move small bump sensitivity). One more thing: DHX does not have HBO at all, not just "does not have external HBO externally adjusted".
I ran it with a perfectly preloaded 570 Sprindex. 600 lbs fox spring and none preloaded 520 in the video, no change on small bump. Even with the 520 cranked up to 570.
I am aware of this formulas, but your also wrong, I dropped the IFP pressure to 100, from 150, also no change. I have another video on it, but this is for setup.
The piston is massive compared to the X2. That is the friction.
HSC is bottom out control as much as HBO is. Have it be not as pleasant. To answer your last statement. 🍻
@@OtterMTBtech dude it has no HBO - period.
If you cannot feel a difference in a 520 and a 600 lbs spring, there might be some other problems going on and you should evaluate where this insensitivity is coming from. I can clearly feel a 50 lbs difference in spring rate on my shock on small bumps. And you should differentiate between static and kinetic friction. I like your channel, but this video is disinformative.
I am not an expert so I appreciate your input.
520- 570 spring no change in small bumps,
Tightened it up to 570 because it rode better like that.
I may have just been ruined by the EXT. I have ohlins shock has no small bump either.
@@OtterMTBtech again, showing you don't understand what you deal with. Sprindex doesn't preload your spring, it effectively shorten the spring by reducing the number of active coils, which increase the spring rate of the spring. In other words you spring curve starts at 0, no matter the setting of your sprindex. On the opposite, if you preload a spring with the shock's collar, this will shift the spring cuvre. If you add 75lbs of preload, that means that the shock won't move for any impact that doesn't create at least 75lbs of impact, which basically destroy any form of small bump sensitivity.
As for the DHX2 vs DHX friction, the reason why the DHX has higher threshold is because it is a mono-tube design which needs high IFP pressure and a lot of IFP movement to function especially with a big shaft. On the other hand DHX2 is a twintube design, by nature if creates very little IFP movement and because it doesn't rely on shaft thickness to create damping at the base valve, it also benefits from less seal stiction due to the smaller shaft diameter. But all in all seal stiction isn't what is creating the bulk of the threshold you measured with the table scale.
Graphic at 5:35 says 1 turn adds 25lbs of spring rate. Spring rate is fixed at coil rate. Preload shifts the curve over but does not change the slope of force vs distance . Disagree with adding preload to prevent bottom out. Ideally you want just enough preload to keep the spring from rattling. I use one turn on my CC inline. I think that before assessing bottom out, you need to ride first and set your lsc and hsc. If you are still bottoming out easily with a prog spring after that, a coil shock is not for this bike.
The shock has no hsc. There is no 570 lb progressive spring. There was no difference in shock preloaded or not
@@OtterMTBtech No hsc? Trash can for this unit, sir.
Just found your channel love your videos and humor
haha, adding bottom out control via preloading the spring is what we broke guys did in the early 2000s.
Bro it’s better than a hard bottom out
I bought this shock for my Forbidden Druid about 4 months ago when it was on sale for dirt cheap. Right out of the box it had a noticeable knock/click while going over high speed chatter type stuff. Feels great but kind of annoying. I came across your other dhx video last week and saw you change the ifp pressure so i bought the adapter,checked mine and it was at 100psi. I pumped it up to the recommended 150psi and it felt like absolute garbage in terms of small bump sensitivity. My question for you is if I drop it back down to 100psi am I damaging the shock in anyway? And have you dealt with any sort of “clunk” with this shock? I read the float x had the same issue and was replace with a “no knock main piston” from fox. Thanks for the great videos 👍
It does have a risk of getting air and oil mixing with lower pressure, but the X2 runs a 100 Psi on the piggyback. Ext 55 psi.
I didn’t hear any clunks, weirdly i found the the Float X ride fantastic, and DHX almost pure garbage, except in rocks gardens (Just got some float X) to make sure I was not tripping
The only improvement was mentioned in video 2 clicks of lsc and progressive spring.
Sluggish performance on anything but the chunk
I have a friend with Orbea same results as me, stiff no small bump weird feel
As a bike mechanic and riding XL frames I have to emphasize NOT to measure sag seated! The seated measure is always way bigger than the only correct measurement in your preferred standing position on the trails. In addition to that: The longer the frame, the worse seated sag measurements get because most frames have a way too similar chainstay length across different sizes - also, there are flatter and steeper seat angles...
Conclusion: Always measure sag in your personal, most comfortable trail riding position STANDING UP with knees and elbows slightly bent. This is very important for shock as well as fork sag.
Thanks dog I’ll give it a shot tomorrow
I had to get a custom tune from CM RM to CL RM
Trying to find the right spring rate for my new YT Decoy MX. It came with the fox dhx shock with no adjustments like the one in the video. It’s a 450lb spring I’m around 175lbs kitted up. I need more support in berms and big hits. Any advice?
They shock sucks get dhx2 and use the tf tune for spring
For $199, is this still a worthy upgrade over my stock Float DPS that came on my Orbea wild? Small bumps would be my main reason for an upgrade
It’s not half bad shock. For sure better than literally any air shock in the chunk
‘23 Fox DHX shock on mega sale shorturl.at/l0xJJ
Have you tried any of the MRP suspension components? Or plan on reviewing there stuff?
Probably not, but I’m sure it’s great small companies have tight control over products
I have big issues with my dpx2, i m quite heavy 210 lbs and i don t know what to do should i upgrade or repair this shock. Mostly i d like a coil shock but which one?
what bike are you on?
I'm same weight & have same shock on my Kenevo - total shite!!
Switching to Rockshox coil very soon - steel shaft 👍
@@sdigsy4414 Bomber CR with Avalanche tune
I couldn’t find one, then discontinued the shock 🫢.
@@trentvlak cool, I'll check it out 👍
Does anybody know if they upgraded something in this coil for the 2025 version?
It does gold stickers on piggyback 😜
Do a video on ohlins
Ttx soon
so do you recommend progressive springs on all kenevo coil shocks.
Not at, but that one for sure
For anyone looking for information on this shock it's probably best to look elsewhere. This guy might be correct in his assessment but he doesn't seem to have the required knowledge to be making such videos.
If you want to help people make, say what I did wrong.
But but but but FOX is the best suspension company right?
Forks yes
Your approach to sag is wrong. How much sag depends on your bike and your riding style and not what Fox recommends.
It’s not a pro level setup video get started kind
FYi, Bikesonline has this shock for $229 shipped.......
That’s not bad
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