Juddering Fork Under Braking

adowling92

Basically i bought myself a new wheelset. I put them on today and when for a ride. When i brake, the forks vibrate and i can feel it through the handlebars.

I cannot see anything that is loose.

Any ideas? i'd be grateful.

fludey

Brand new wheels? I had similar issue but was on 6month old wheels, you couldn't see it with naked eye...but the wheel at the joint had slightly collapsed..could be found with vernier....so each time brake hit this spot it would judder..only fix was a new rim!
Worth a check.

adowling92

Brand new wheels though mate

bikeit65

Was everything okay before you fitted the new wheels?

dee4life2005

Could be a very slight bit of play in the bearings in the hub - do you get the same with your old wheel ? This would rule out the headset. As above though, if the wheel is ever so slightly out of true (which can happen with new wheels) then the brakes can grab which can give a juddery type feeling.

mattcroad

I would check the the point where the rim is joined. I got a new RS30 wheelset about a year ago and the front wheel was about 0.25mm at that point, sent judders through my forks whenever I applied the brakes. Any slight imperfection along the brake track will cause the brakes to bounce over, or drop down to the new level resulting in the brakes / forks jarring. I contacted supplier and they replaced it immediately.

ugo.santalucia

dee4life2005 wrote:

Could be a very slight bit of play in the bearings in the hub - do you get the same with your old wheel ? This would rule out the headset. As above though, if the wheel is ever so slightly out of true (which can happen with new wheels) then the brakes can grab which can give a juddery type feeling.

+1

keef66

What happens if you fit the wheel the other way round?

adowling92

Bikeit65 wrote:

Was everything okay before you fitted the new wheels?

Swapped the wheels back over and the problem isnt there with the old wheels.

mattcroad wrote:

I would check the the point where the rim is joined. I got a new RS30 wheelset about a year ago and the front wheel was about 0.25mm at that point, sent judders through my forks whenever I applied the brakes. Any slight imperfection along the brake track will cause the brakes to bounce over, or drop down to the new level resulting in the brakes / forks jarring. I contacted supplier and they replaced it immediately.

can't even see the join. Not even on the inside of the rim with no inner tube or tyre.

keef66 wrote:

What happens if you fit the wheel the other way round?

Still does it.

adowling92

Just got the vernier out. The rest of the rim is 2.5mm thick, but the join is just over at about 3mm!! Gonna get hold of wiggle and hopefully they'll let me send just the one wheel back, as my rear one has hat its cassette and everything put on it!

Cheers guys.

fludey wrote:

Brand new wheels? I had similar issue but was on 6month old wheels, you couldn't see it with naked eye...but the wheel at the joint had slightly collapsed..could be found with vernier....so each time brake hit this spot it would judder..only fix was a new rim!
Worth a check.