I’m struggling with my Brompton’s front hub. I noticed weeks ago that it wasn’t spinning freely, so I pulled it apart. The preload was ridiculous, the bearings had slight wear, and one of the cones had v. light pitting. The races had a decoloured line but they weren’t scored or pitted.
I replaced the bearings, regreased, and reassembled. A few weeks later, the wheel again wasn’t spinning freely, and the cones had tightened against the bearings. I disassembled, inspected, deduced I hadn’t tightened the cones correctly previously, and reassembled.
Well a week ago it happened again. I’ve barely used the bike, not that it should matter anyway.
Any ideas? I’ve serviced hubs in far worse state than this, and they don’t self-tighten like this.
I’m struggling with my Brompton’s front hub. I noticed weeks ago that it wasn’t spinning freely, so I pulled it apart. The preload was ridiculous, the bearings had slight wear, and one of the cones had v. light pitting. The races had a decoloured line but they weren’t scored or pitted.
I replaced the bearings, regreased, and reassembled. A few weeks later, the wheel again wasn’t spinning freely, and the cones had tightened against the bearings. I disassembled, inspected, deduced I hadn’t tightened the cones correctly previously, and reassembled.
Well a week ago it happened again. I’ve barely used the bike, not that it should matter anyway.
Any ideas? I’ve serviced hubs in far worse state than this, and they don’t self-tighten like this.