musiclover wrote: ↑
Sun Oct 24, 2021 8:34 am
Maddie wrote: ↑
Sun Oct 24, 2021 6:25 am
In that case just get a new derailleur hanger and add some middle strength loctite to the m4 bolts.
The stock nuts had a thread locker from the factory, unfortunately, it did not work.
Karvalo wrote: ↑
Sun Oct 24, 2021 7:57 am
Will the nut on a standard QR be improved by the addition of a second nut?
Isn't QR equipped with a preload lever? I thought it's design is different to a standard thru axle without the preload handle
Addressing just the title first: "Why thru axles are used without nuts and washers?"
As has been mentioned, the threaded insert in the fork/frame is
the nut. Tensioning the axle sufficiently
(preload) prevents this system loosening, or moving excessively in normal use. There's no reason for an additional nut, nyloc, spring or otherwise; it's simply not necessary.
A washer at the lever/hex key end should be standard, to prevent any damage to the mating surfaces; every thru-axle I use has one, but that's because they all have a preload lever - the part that the lever acts against also acts as a washer.
Moving on to what seems to be your real complaint about a traditional 10mm rear dropout with a particular type of hanger.....
It has taken me a while to understand what you mean, but I think I do now.....
musiclover wrote: ↑
Sun Oct 24, 2021 11:18 am
Also, don't know how common it is but the rear drop out is two in one with the derailleur hanger.
Is the hanger placed on the outside of the frame, or the inside? If it's on the inside, so that the hub axle sits directly on/in it then that will be the problem I suspect. Hanger on the outside is standard - a "two in one" hanger on the inside doesn't work as soon as you ride much (perhaps ok if you're really light). If your hanger is on the outside, then I think we'll need a picture to understand what's happening.....
Edit: I should make clear that this issue, for two-in-one hangers, affects traditional hubs (10mm dropout). As an example, Cervelo's thru-axle rear dropout/"nut"/hanger works well. It all depends on exactly how the dropout/"nut"/hanger is attached to the frame