YST Threadless Bottom Bracket
YST BB993 Threadless Bottom Bracket
A solution to stripped threads
Instead of threading onto the threads of the frame's bottom bracket shell, the YST BB993's steel cups thread on to the steel body of the cartridge sealed bottom bracket unit.
- The cups are tapered to centre themselves in the bottom bracket shell.
- Shimano-compatible square-taper axle (not splined).
- 68mm shell width.
Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.
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|This is an asymmetrical bottom bracket with a JIS taper. Its symmetrical equivalent is 115-116mm - this is really important to know as it will affect your chainline measurement (the bottom bracket code is UN 73). I bought this not knowing this (!) and my front derrailleur would not shift onto the large chainring due to the effect on the chainline measurement. I'm now going to replace it with the Velo Orange thread less bottom bracket (which comes in smaller sizes and is symmetrical). Having said this it is good quality and good value so if you can make the measurements work then it's a good option. I would recommend to threadlock it in place as it does have a tendency to loosen. I managed to install it easily with a single shimano type bottom bracket tool (you may have read elsewhere that 2 tools are required). The 110mm option may be more suitable for a road double but i'm not sure about the axle symmetry on this one.|