By blackmountaincycles,
Filed under: Uncategorized
For about twenty bucks in parts and another thirty to forty in labor to remove cranks, bb, press out old bearings, press in new bearings, reinstall cranks, check shifting…you can have a sweet smooth rolling crankset and not have to have to dispose the entire bottom bracket unit. Reuse the cups and center sleeve and keep on pedaling and have a better bottom bracket.
I was reminded of how much I like this fix when a bike came in for new chainrings and chain last week. After removing the chain, I marveled at how smoothly and easily the cranks spun. Give them a spin and they spun round and round and round and … They spun around a lot. I then remembered that I had replaced the bottom bracket bearings with Enduro bearings quite a while ago and they were still fresh as day one.
I also recently discovered/realized that Wheels Mfg. had produced their own bottom brackets with prices that sit comfortably between Shimano’s and Chris King’s. For $55 you can get a new bottom bracket that is assembled with Enduro’s radial ABEC-3 bearings and for $75, you can get their bottom bracket assembled with Enduro’s angular contact bearings. Twenty bucks is a good upgrade to get a bottom bracket with angular contact bearings since they are better at resisting a side-load – and it’s very common for Shimano bottom brackets to be overloaded from the side when the left arm crank arm fixing bolt is overtightened. That act is probably the main reason why Shimano Hollowtech II bearings fail prematurely. The Wheels Mfg. bottom brackets are a new addition to the shop, because they work great and offer a nice option on a new build or repair job.
“DO NOT DISASSEMBLE” – yeah, right.
Disassembled
A fresh Enduro bearing ready to be installed
Enduro bearings still like new after miles of off-road riding.
Or if you’re starting from new, this $75 Wheels Mfg. bottom bracket with Enduro angular contact bearings is a great choice – and it’s made in the USA. Shot doesn’t show the included secondary shield.
(What’s playing: The Byrds Hungry Planet)
I’ve Got A Confession
Joe’s Bike
I notice Wheels Mfg make a GXP/SRAM BB as well, good to know. Correct me if I'm wrong, but an angular contact bearing in the drive side only (as stated on the Wheels Mfg webpage for the GXP BB) would be pointless, correct (GXP crank installation pinches ND bearing)?
Evan
Even,
Yes and mostly yes. The non-drive side bearing's inner race is pinched against the axle shoulder and the cranks. If there is any mis-alignment / bb shell spacing issue, the drive side AC bearing would likely be a good option to extend bearing life compared to a radial bearing. SRAM's non-drive side bearing floats to accommodate any mis-alignment issue.