It's an alpenchallenge. The spec just says BSA threaded bottom bracket. I gather most BBs tighten anti-clockwise on the drivechain side, but this is a BBB to undo and i want to make sure i'm straining in the right direction - i.e. clockwise. Thanks for any assistance.
Bottom Bracket - left or right-hand thread?
- Thread starter autolycus
- Start date
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Cubist
Still wavin'
- Location
- Ovver 'thill
The right hand, drive side is reverse thread, so clockwise to loosen. The non drive side is standard thread, so anticlockwise to loosen.
accountantpete
OAP
For British threads always undo in the direction the crank rotates when pedalling.
Thanks for that. I managed after a struggle.
A good tip seems to be to screw an appropriate size (40mm M8 in this case) bolt through the middle of the extractor into the axle with a big washer to hold the tool firmly in place. Without this technique i found that the tool popped out when any appreciable torque was applied. I also first first located a big (22mm in this case) ring spanner on to the flats of the tool - the open end would have rounded them with the force (basically jumping on it) that was required.
A good tip seems to be to screw an appropriate size (40mm M8 in this case) bolt through the middle of the extractor into the axle with a big washer to hold the tool firmly in place. Without this technique i found that the tool popped out when any appreciable torque was applied. I also first first located a big (22mm in this case) ring spanner on to the flats of the tool - the open end would have rounded them with the force (basically jumping on it) that was required.
Ajax Bay
Guru
- Location
- East Devon
Bit o' juice first is a recommended prophylactic (in the circumstances related above 
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