Rock Shock 29er.. Wheel not center..

[Wyatt Earp]

This implies that if the disc was on the other side of the same wheel it would pull the other way? Sorry...disagree. If the spoke tension is wrong the rim will 'warp' away from the side with the loose spokes. Disc position irrelevant.

 

If disc position was causing bikes to pull to one side then all bikes would do it to some extent - none of mine ever have!

 

ONLY way for a braked wheel to impart torque to the steerer tube (thus pulling the bike off line) is if the tyre's contact patch is off centre to one or other side of the steerer axis so :

- dish or uneven spoke tension or lacing causes wheel rim to warp away from centre under braking forces or it is offline all the time

- fork or axle is bent so that tyre contact patch is off centre of the fork/steerer

- hub displaced to one or other side so tyre not rotating centrally between fork legs

- leaning hard in a corner ( or off-camber trail) so the tyre contact patch is not centralised on the tyre tread

I am gonna go with the dishing is out, but I will even try a more farfetched approach, the front brake is on the left and the OP has a heavy braking hand with the tendency to shift his body to the left subconsciously .

[The Riding Realtor]

I am gonna go with the dishing is out, but I will even try a more farfetched approach, the front brake is on the left and the OP has a heavy braking hand with the tendency to shift his body to the left subconsciously .

whahaha! Ok, this has made for seriously enlightening reading!

 

So, I dropped it off to be trued, to pick it up in the morning! I will def revert back with the results!

 

Very curious to see how it all turns out. I don't know too much of the bike's history, as I mentioned, 2nd hand. The seller didn't seem to be hiding anything. Reason for selling was along the lines of family time becoming vital, new baby, etc. Less time to ride.. Bike seemed to be in good shape. No visible heavy damage, cracks, etc. So, let's hope solution is simpler than bent forks!

[martinvdw]

Had the same problem with my DT swiss wheels in my SID xx world cup fork. Had it dished and it is all good now.

[The Riding Realtor]

Ok, so now, according to LBS, my wheel is true as Bob. However.. My issues remain. About a 5mm deviation to the left if I apply brakes hard, and the gap on the left side between wheel and fork is a few mm smaller than the right side whilst staionary.

 

DT Swiss Rims.

QR

[The Riding Realtor]

See..

[Daniel J Méssem]

qr or thru axle?

 

what qr is it?

[The Riding Realtor]

Update: If I flip my bike over, and release the QR, the wheels sits center, as the QR relinquishes its hold...

[The Riding Realtor]

Sign of QR being screwed?

[Daniel J Méssem]

Sign of QR being screwed?

if its a poor quality qr it wont be tight enough to hold thw wheel straight...

[The Riding Realtor]

I was actually concerned that it was too tight. Can it be too tight?

[Daniel J Méssem]

I was actually concerned that it was too tight. Can it be too tight?

not really, but the poor quality ones will feel tight in the qr lever and not pull the qr tight enough

[JXV]

See..

Ok so your whole tyre/rim clearly off centre from the steerer/frame centreline. This is the root cause as I suspected. Now...why is it doing this? Some possibilities:

1- Wheel dish. By loosening spokes on left and tightening on right the rim can be pulled across to the centreline. A decent wheelbuilder to be used for this but before you do, first check....

2- check the spacers on your hub. On DT Swiss hubs they should just pull off if you wiggle them ..wrap in a layer of cloth and gently grip with waterpump pliers if fingers dont work. Once off check if both spacers are same height...they should be different with the one on disc side being shorter (thats how they were on the last DT Swiss 240s 9mm QR hub I stripped). If different...swop them over and see if that solves the problem. Also check if washers have been used between the spacer and bearing...again, try swopping over to centralise the wheel. If spacers are correct then go back to 1-dishing

[The Riding Realtor]

Ok, so got a new one of these... Previous one had the screws on one end seized on. Also at a bit of an angle. So I assume that pulled the fork 'skeef' when applying the pressure of the QR.

 

Will revert back in a few min

[Mr X]

These Scotts with DT Swiss or Alex wheels and qr forks have the tendency to fold completely up under strain and throwing the rider over the handle bar, I have heard of this happening a few times, and saw this happen twice, once with DT wheels and the other time with Alex wheels, but all occurrences with qr forks. BAD SCOTT!!! (not great scott) these older models were/are a danger to their riders!

 

My recommendation is to replace the fork with a 15-20mm thru-axle fork, and get some proper wheels too. 

[JXV]

Ok, so got a new one of these... Previous one had the screws on one end seized on. Also at a bit of an angle. So I assume that pulled the fork 'skeef' when applying the pressure of the QR.

 

Will revert back in a few min

Oh....not DT Swiss hubs then......I see I mixed you up with another reply about DT hubs.....so half my previous post irrelevant....sorry (embarassed!).

 

I'm pretty sure the new axle will help you to centre the rim in your forks ????

[The Riding Realtor]

Hehe!!! Yep, my rim is all sorted! Even when applying the brakes!!! Happy day!

 

Now let's go get dusty!