Is the shock bottoming out? I’m not familiar with that shock but something definitely doesn’t look right with it.
Big-Don-Kedic on
Why is the shock fully compressing so easily? You’re fully compressing it with just your body weight
Barde_ on
hard without having the bike in front of me, but maybe you can look at the shock eyelet bushing? if they’re the plastic fox like ones they can develop play quickly, if they are rockshox like DU bushings they last longer but can still do that.
do you feel this knocking while riding?
-ImMoral- on
I would start by checking all the linkage and shock mount bolts/bushings/bearings for play. Take off the shock and see if the knocking happens off the frame.
That way you can isolate the source. If it is the shock itself I’d imagine there is something broken inside, that doesn’t sound normal.
Edit. Oh and r/bikewrench will give better reaults than posting here.
Willbilly410 on
Use your finger to feel around the pivots/ eyelets/ shock body and try to pin point where that is coming from. You should feel a vibration/ movement on the culprit
Hard to diagnose via video
Tadeh on
I can’t tell from the video, but is this one of the coil shocks with a lockout? When this happened to my air can, it was bc the lockout switch was slightly engaged
TieHungry3506 on
As others have said pretty hard to diagnose from a video. But sounds a bit loud and unusual.
Might be a cracked damper shaft inside the shock. Does it make more of a CRACK when it’s loaded quickly? Like drop the rear wheel/while bike from like 40cm
Main symptom of that is it won’t make noise when compressed slowly but makes a hell of a racket when the shaft speed is high and the 2 broken pieces impact together.
Seems a little like the above might be happening from your video but also that it’s making a fair bit of noise without particularly fast compression.
Swapping the shock is the easiest way to diagnose if it’s a shock issue.
Other than that…
Standard stuff – all points tightened correctly?
All pivots greased properly?
Seat post greased?
Derailleur bolt tightened correctly?
Rear axle tightened correctly and greased?
Basically just have to go over the whole damn bike if you’re sure it’s not the shock. And if you’re not sure if its the shock you basically just have to go over the whole damn bike! 😂
fortnitefucker2000 on
Pretty sure it’s the clevis. I had same issue a year back, talked to Commencal about it and they provided me a new clevis
8 Comments
Is the shock bottoming out? I’m not familiar with that shock but something definitely doesn’t look right with it.
Why is the shock fully compressing so easily? You’re fully compressing it with just your body weight
hard without having the bike in front of me, but maybe you can look at the shock eyelet bushing? if they’re the plastic fox like ones they can develop play quickly, if they are rockshox like DU bushings they last longer but can still do that.
do you feel this knocking while riding?
I would start by checking all the linkage and shock mount bolts/bushings/bearings for play. Take off the shock and see if the knocking happens off the frame.
That way you can isolate the source. If it is the shock itself I’d imagine there is something broken inside, that doesn’t sound normal.
Edit. Oh and r/bikewrench will give better reaults than posting here.
Use your finger to feel around the pivots/ eyelets/ shock body and try to pin point where that is coming from. You should feel a vibration/ movement on the culprit
Hard to diagnose via video
I can’t tell from the video, but is this one of the coil shocks with a lockout? When this happened to my air can, it was bc the lockout switch was slightly engaged
As others have said pretty hard to diagnose from a video. But sounds a bit loud and unusual.
Might be a cracked damper shaft inside the shock. Does it make more of a CRACK when it’s loaded quickly? Like drop the rear wheel/while bike from like 40cm
Main symptom of that is it won’t make noise when compressed slowly but makes a hell of a racket when the shaft speed is high and the 2 broken pieces impact together.
Seems a little like the above might be happening from your video but also that it’s making a fair bit of noise without particularly fast compression.
Swapping the shock is the easiest way to diagnose if it’s a shock issue.
Other than that…
Standard stuff – all points tightened correctly?
All pivots greased properly?
Seat post greased?
Derailleur bolt tightened correctly?
Rear axle tightened correctly and greased?
Basically just have to go over the whole damn bike if you’re sure it’s not the shock. And if you’re not sure if its the shock you basically just have to go over the whole damn bike! 😂
Pretty sure it’s the clevis. I had same issue a year back, talked to Commencal about it and they provided me a new clevis