Wheel wobble after swivel hub rebuild

[1989hj75]

Hi all,

Chasing a bit of wisdom here.

Just finished up a full swivel hub rebuild (DSF). Everything seems to be going pretty smoothly with no movement until I put my wheel on and spin it. It spins freely, can’t wobble it by hand it’s nice and firm but when spinning it waves in and out. Have tested to see if it’s a buckled rim but it’s still wobbling with the spare on. Any ideas?

 

[Felde]

Sounds like the centering of the hub is not correct and you face a radial runout.
To check, take off the wheel, put a static pointer from the knuckle housing to the hub, rotate the hub and see what you get..
The hub rotates on the spindle, guided by the bearings. The inner and outer bearing sit on a distance (from each side of the hub / hub thickness), so they form a geometric axis, which needs to be parallel to the spindle the bearings ride on / 90° to the hub surface the wheel mounts to. If not, it's wobbling / has a runout.
Reason thus could be
- the bearings not being seated flush and parallel in the hub
- hub and brake disks not being parallel (the brake disk actually centers the wheel studs and the wheel)
- hub bent.
Recall how you installed the bearings: Pressed them in (probably with a hydraulic press, which could even press a besring in off camber or even deform a hub) or gently hammered them in? Any difficulty you recall?
Good Luck Ralf

 

[Tigris]

There are a few variables at play but my money is on what is stated above by @Felde

How did you set your preload on the bearings? Were the nuts locked in after setting the preload? Just me thinking out loud.

 

[1989hj75]

Thanks everyone for your advice it was actually a much simpler issue. I had multiple people on the rebuild job with me and somebody had put the assembly bolts for the brake calliper on backwards. The bolt heads were hitting up against the rim causing it to not sit on straight.

Such a silly thing to have not noticed!