Not sure if this video really shows what is going on, but I'll try to explain.
My brother bought a new G line recently, and it is a thing of beauty, no question. I was takong a look and giving it the once-over, and there was something I wasn't sure about.
Initially I thought this was some play in the steering column, but it's the rear wheel. When the rear brake is FULLY ON there is a small movement from the rear hub when I rock the bike forwards and backwards. I'd expect there to be ZERO movement when the brake is enabled. Before anyone says, it's not the tire moving on the floor, the hub itself seems to be moving, while the rotor stays still.
Any thoughts on what this might be? if it's normal for these sort of hubs I'd accept that, but I don't have this on other bikes. Thanks.
G Line – Rear wheel shift with brake full on
byu/archibaldflibble inBrompton
by archibaldflibble
3 Comments
That’s odd my advice check the caliper bolts first and ensure they’re tight followed by the locking for the disc. The centrlock disc mount is part of the hub body itself so it can’t move independently.
It’s probably the pads in the caliper, they’re not an interference fit, so there’s plenty of slop.
The other places you might be getting this from:
Rear hinge clamp (behind the seatpost) it’s not a retained clamp, so has about 1mm of play, this looks right for this movement as well
Front hinge clamp, if this isn’t tight enough, then the hinge can wobble like this, but it doesn’t look right to be that.
Disc brake need bed in
Just give it a ride