Put front brake on and one hand on fork brace and I get a definate knocking/rocking back and forward motion. It's not the headset. With no brake on the bike does not knock when pressed against wall. Pair of 12 month old Rebas. Is this a LoCo job.
Floating discs... ?
Worn bobbins... ?
No floating disc - but I know what you mean - they did a similar thing.
Is it a pro2 hub by any chance
Could be lack of oil in lowers, they rely on hydraulic action to lubricate them.
Easy way to tell if that's the case, pop the bike upside down for 5 minutes, and try again. If it doesn't knock, you need to change the oil in the lowers.
If not, go give Simon at Loco a bell 🙂
Some brake pads create this sensation: they seem to move to and fro in the calipers when the lever is squeezed. You sure its not this? You can ususally see them move though if looking very closely.
could be movement in the disc pads?
Yep a pro2 hub - running at 15mm.
From speaking with tft, its not easy to wear out bushings and you likely to see stanchion wear first iirc. Stick your little finger between the stanchion and fork brace near the wiper seal then rock the bike with the brake on...should feel it pinch if bushings
Reckon you might be right - it's something else... Dammed if I can work it out at the mo though..
What calipers and what pads? I know superstar pads in my slx's knock / clunk when doing the headset test.
XT brakes knock too...
Wally.It's the pro2.Some of the older ones hate 15 and 20mm.It's a tolerance issue with the adapters.Hope know about this one.
I have one of these pain in the arse hubs.There have been threads about it on here.I narrowed it down by putting another front wheel in with a newer pro2 hub and it totally disappeared.
Grab the top of the wheel and gently rock it from side to side.You will feel the play.This translates that when you pull the front brake and rock the wheel it feels like the bushings or the headset.Might take you a couple of attempts to feel it.
Remove the front wheel, turn the bike upside down, stand with your feet on the handlebar grips and grasp the fork legs, if you can rock them back and forward then the bushings are ****ed - dependant on how bad they feel it may be possible to replace the bushings otherwise they may be beyond reasonable repair....cry into handkerchief and suck it up like the man you wish to become.
turn the bike upside down, stand with your feet on the handlebar grips
Do [i]what[/i]?!
Could be lack of oil in lowers, they rely on hydraulic action to lubricate them
No. It's not that. A few ml of oil won't stop bushes knocking.
Anyway, if you've checked your headset, all the disc and calliper bolts, and the fork bearings, all you need to do to check it IS the forks is jam your finger between the stanchion and the arch, and you can feel it
It's no biggie if there is play, the bushes will most likely not need replacing as all the tuning and servicing guys simply adjust the bushes you have and size them to the stanchions as part of a routine service anyway
I've had a few pairs of RS forks (ahem.....) and there's the odd one that goes slack remarkably quickly, but once they've been sorted they're fine for years after.
then the bushings are **** - dependant on how bad they feel it may be possible to replace the bushings otherwise they may be beyond reasonable repair....cry into handkerchief and suck it up like the man you wish to become.
Not gonna happen. They'll be fine.
Done upside down bit and wheel out. Wheel is fine - new Evo2 hubs - knocking was almost gone. I will do a complete fork strip down after ride and see then. Many many thanks for advice - useful stuff, how unlike STW! If I work it out I will post up.
Could be lack of oil in lowers, they rely on hydraulic action to lubricate them
No. It's not that. A few ml of oil won't stop bushes knocking.
Yes it will. Give it a go, remove the oil from your lowers and you'll hear them knock.
Put the front brake on.wrap your hand around the intersection of the lower leg
and stanchion. Rock back and forwards. If it's the bushings then you'll definitely feel it.
Somafunk has described the definitive test
is the bike in question a full suspension by any chance.try lifting bike up and down by the seatpost.
did you manage to solve this problem
is the bike in question a full suspension by any chance.try lifting bike up and down by the seatpost.
I'll have a fiver on rear shock eye bushing if it is!