Freewheel thread on old Campy hub?
10-22-20, 03:52 PM
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Freewheel thread on old Campy hub?
Hi,
I just removed a Sachs Maillard 7 speed freewheel from a campag hub. The sprockets are badly worn and I need to replace, but I'm wondering... is the thread always the same on a freewheel, or is there the rear wheel equivalent of an Italian thread/British thread option.
Thanks in advance
Matt
I just removed a Sachs Maillard 7 speed freewheel from a campag hub. The sprockets are badly worn and I need to replace, but I'm wondering... is the thread always the same on a freewheel, or is there the rear wheel equivalent of an Italian thread/British thread option.
Thanks in advance
Matt
10-22-20, 04:24 PM
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Matt,
There are differences in the older hubs. Easy way to check is to use a bottom bracket lock ring. The English threads are the same as the English threaded bottom bracket. If the lock ring screws onto the hub easily it is and English threaded hub. HTH, MH
There are differences in the older hubs. Easy way to check is to use a bottom bracket lock ring. The English threads are the same as the English threaded bottom bracket. If the lock ring screws onto the hub easily it is and English threaded hub. HTH, MH
10-22-20, 04:44 PM
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10-22-20, 08:57 PM
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Manufacturing tolerances can be greater then threading spec differences (WRT Itl and BSA). However it's generally best to not switch between the two any more then you have to. BTW ISO FW threads have taken over from these older specs.
Back in the day Campy hubs were marked with which spec they were made for. So to many freewheels had marks or other indicators to the spec. Andy
Back in the day Campy hubs were marked with which spec they were made for. So to many freewheels had marks or other indicators to the spec. Andy
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10-23-20, 09:30 AM
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Old Campagnolo hubs (say, before 1978 or so) indicated thread spec with the presence or absence of a groove in the space between the freewheel threads and the hub flange. Later Campagnolo hubs were explicitly marked with the thread spec.
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