Fork judder

[presta]

I think you're doing Halfords' job for them for free, but if you're bent on it I'd be looking for free play in the headset, suspension fork legs, axle, brake disc, or calliper, and failing that, contaminated disc and/or brake pads. If you're cleaning the disc, make sure you don't use anything that leaves an oily residue, like white spirit.

 

[Jody]

My money is on the brakes not being bedded correctly or machining pattern on the disc

 

[fossyant]

My money is on the brakes not being bedded correctly or machining pattern on the disc

And or a bit of contamination. Brake disc cleaner.

 

[Jody]

And or a bit of contamination. Brake disc cleaner.

I would expect contamination to cause poor performance or noise.

That's why I asked what the OP feels is judder as it can cover anything from a loose headset, fork bushes, brake issues. There isn't enough info to help them.

Halfords blaming the fork lowers would suggest it isn't the headset so could be flex in the stanchions when braking or an issue with the front disc. Or the guy at Halfords isn't very knowledgable and is trying to blag his way out the query.

 

[figbat]

Is this not just contaminated pads/disc? Or the wrong compound? Or not bedded in?

 

[fossyant]

Is this not just contaminated pads/disc? Or the wrong compound? Or not bedded in?

It can be. I bought some new wheels and some lightly used discs (170mm front so a fussy size) and I forgot to bed them in. Braking was a bit snappy rather than juddery.

 

[DRM]

Also have you bedded in the brake pads. Do this on the street near home (somewhere quiet). The judder will still happen. You need to brake hard a number of times, but don't fully stop. Check the headset first and there is no rocking/clunking when front brake pulled.

I asked the OP to check for free play in the head set bearings further up, they came back saying there’s no movement at the bearings

 

[fossyant]

As the bike is new, it needs to go back to the shop !

 

[Ian a 17]

Thanks guys all sorted halfords change brake pads and clean disc also soften the air forks and seems all good thanks for advice everyone