Riding a Genesis Brixton. When I ride, every ~20 minutes the read wheel seems to ‘rotate’ slowly until the sidewall of the rear tyre is rubbing heavily against the chainstay.
The only thing I can think of is it has something to do with the glossy paint job being applied to the part where the thru-axle is gripping the frame? Pic attached if it is any help (not mine but same model).
by pakchoi_
5 Comments
What tool are you using to tighten the axle nut?
The nut on those style of dropouts (or rather fork ends) should be torqued up to 35Nm+
If you’re doing it with a piddly little 15mm spanner, you probably need a bit more leverage.
There should be an anti slip washer under the axle nut that bites into the frame so that things don’t slip. Those bolts also need quite a lot of torque, you need a proper wrench to tighten them if you aren’t already.
you take it to a bike shop…
Post a close up picture. I suspect you’re missing the required washer that you need with the Alfine hub.
Which side is making contact? Drive side or the brake side?
Are you hauling anything or just riding regularly?
Contact with the chainstays is pretty common when your tires are too wide, you lean an awful lot on turns, or you very rapidly accelerate or decelerate. The force necessary for each of those things twists the tire a different direction.
The randomness of it makes it sound like the TA is installed wrong, or like maybe it’s royally out of true or dished poorly. But as you turn, brake or accelerate you will twist that part of the bike, if it’s twisting too much the frame’s about to go (it’s supposed to have some compliance, but if the wheels are right – not that much).
I’d probably take this to a bike shop and have a pro take a look. You don’t want to ruin your frame or wheel, and if it’s about to fail you probably dont want a pile of sharp metal flying in the air with you while your flung from your now broken bike.