Bottom Bracket or something else ??
My relatively new Canyon has developed a pretty nasty sounding clunking and i just want to rule out everything before it takes trip to the LBS.
Under heavy load - pushing a low cadence out of the saddle it makes a very loud clunk when the drive side crank is at the bottom of the pedal stroke.
The bike is under 300 miles old and i noticed this issue after about 200 miles. It got progressively worse over a ride on Saturday which involved a lot of steep climbs.
What does seem weird is that it only clunks under heavy load, out of the saddle on the drive side. Out of the saddle on the flat there is no noise and when in the saddle under load there is no noise.
Any ideas ??
Under heavy load - pushing a low cadence out of the saddle it makes a very loud clunk when the drive side crank is at the bottom of the pedal stroke.
The bike is under 300 miles old and i noticed this issue after about 200 miles. It got progressively worse over a ride on Saturday which involved a lot of steep climbs.
What does seem weird is that it only clunks under heavy load, out of the saddle on the drive side. Out of the saddle on the flat there is no noise and when in the saddle under load there is no noise.
Any ideas ??
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Comments
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Tighten up skewers. If bling Ti models, keep tightening and grease dropouts.0
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You say clunk rather than a "ping" or "click" but check where the spokes cross on the rear wheel too. Sometimes under load they move a little causing noise, especially when standing on the pedals. Try a bit of lubrication where the spokes cross and see if it solves the problem.I ride a bike. Doesn't make me green or a tree hugger. I drive a car too.0
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philthy3 wrote:You say clunk rather than a "ping" or "click" but check where the spokes cross on the rear wheel too. Sometimes under load they move a little causing noise, especially when standing on the pedals. Try a bit of lubrication where the spokes cross and see if it solves the problem.
Think most wheels nowadays are radial spoke layout so they dont cross over each other.0 -
I had something similar on my bike a while back, thought the BB was knackered but just needed nipping up, quarter turn later (not antwhere near that really) noise had gone
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Flashart wrote:I had something similar on my bike a while back, thought the BB was knackered but just needed nipping up, quarter turn later (not antwhere near that really) noise had gone
After checking pedals, spokes, cassette and skewer iv still got the noise.
Spoke to the LBS and they have said its probably exactly this -the OH is dropping it into them this afternoon to have a quick look and just double check everything else.
Will update once they have had a look0 -
The rear wheel must have at least some crossed spokes, because radial spokes are incapable of transferring torque.SmoggySteve wrote:Think most wheels nowadays are radial spoke layout so they dont cross over each other.0 -
The rear wheel must have at least some crossed spokes, because radial spokes are incapable of transferring torque.
How does a front brake transfer the torque then?0 -
Rim brakes generate no torque at the hub, so radial spokes work fine there. Hub brakes (e.g. disc brakes) are different, and require crossed spokes the same as a rear wheel.paulwood wrote:How does a front brake transfer the torque then?0 -
SmoggySteve wrote:philthy3 wrote:You say clunk rather than a "ping" or "click" but check where the spokes cross on the rear wheel too. Sometimes under load they move a little causing noise, especially when standing on the pedals. Try a bit of lubrication where the spokes cross and see if it solves the problem.
Think most wheels nowadays are radial spoke layout so they dont cross over each other.
"Most"?? I really don't think so. Quite a few radial fronts, but (and I'm prepared to be proven wrong here) I don't think I've ever seen a radially spoked rear wheel - the spokes just wouldn't handle the torque in that configuration.0 -
Tjgoodhew wrote:Flashart wrote:I had something similar on my bike a while back, thought the BB was knackered but just needed nipping up, quarter turn later (not antwhere near that really) noise had gone
After checking pedals, spokes, cassette and skewer iv still got the noise.
Spoke to the LBS and they have said its probably exactly this -the OH is dropping it into them this afternoon to have a quick look and just double check everything else.
Will update once they have had a look
It was the above - BB just needed a tighten - about half a turn. Took it out for a long ride Saturday and the noise has completely gone0
