Originally Posted by
stuartjmiller
Thanks Hillrider - very helpful! You are quite right - there is some paint overspray in the bottom bracket shell - I'll take it to my LBS for a clean-out.
Am I right in thinking that all Italian threads are the same? Is it 24 threads per inch?
Thanks again!
Stuart.
Yes , all Italian threads are the same at 36 mm x 24tpi, an interesting mix of metric and SAE dimensions. BTW, both cups are right-hand threaded so be sure the fixed (drive side) cup is installed to the proper torque (i.e. VERY tight) so it doesn't loosen in use.