bike wrench

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A place to ask bicycle repair questions, and for bike shop monkeys to share advanced non commercial wrenching resources (no YouTube self promotion). This is only for repair related topics.

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j4k3

DIY true a wheel (self.bikewrench)

submitted 6 months ago* (last edited 6 months ago) by evasync to c/bikewrench

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I had some wheel made but when they rotate they come in contact with the disc break pads (slightly).

The bikeshop that built them will take another month to look at this, as they are fully booked, and I dont want to pay 35+ on another bikeshop..

Is it doable to DIY this with a spoke key and using the fork as a stand?

(I think it would be a useful skill to learn as it will make me less dependent on bikeshops)

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[–] evasync 2 points 6 months ago (1 children)

If wheel wobbles wouldnt that also make the disc wobble?

[–] j4k3 7 points 6 months ago

The rim is positioned by the spokes, but the hub is constrained by the bearings and dropouts. It is a rigid member. The rotor disc is attached to the hub directly.

Disc brakes are not easy to setup and get them right. I'm a hardcore roadie from back before disc brakes were a thing for road. I also have a top shelf mountain enduro bike that has disc brakes. While I work on all of my own road stuff, I avoid working on fork/shock internals and disc brakes. I've worked in several bike shops and I always pay the mechanics to setup my disc brakes. I've learned the hard way of having the annoying things make tons of noise and problems.

There is a Park Tool rotor truing tool that they use to tweak the positioning of the rotor by bending it slightly. It is difficult to tweak them right without making the problem worse. Here is the tool used with a special jig on a truing stand that allows more accurate adjustment without turning the thing into a wavy piece of junk: