Current Projects chat and miscellany

Tightening torque for AC-S and AC-H cartridge square taper BBs is 70Nm, right cup first. If your BB shell is properly prepared, this should work, without distorting the cartridge housing. You'll probably find your left cup shoulder is closer to the shell once you've done it up to the correct torque.

There are only two versions, 68mm BSC and 70mm ITA, using the same cartridge core with different cups.

I see.

The cups do say 70nm on them. I don't have a torque wrench so I can't test this but it was pretty fucking tight on both sides I was heaving quite hard. Perhaps its the fact that the bb shell hasn't had the threads run through for a while and it has never been reamed (correct term?)

The only possible Issue I can see is that the left crank arm runs closer to the left cup than the right hand arm runs to the right cup. I guess that proves that the left hand cup is not tight against the BB unit yet.

As long as no one thinks its going to cause any major problems I will deal with it as soon as i get the time.