On Sunday, July 8, 2018 at 9:58:47 AM UTC-5, Emanuel Berg wrote:
mike.phone.schwab wrote:
1/8 inch 3.2 mm is fixed / freewheel single
speed only. 3/32 inch 2.4 mm is derailuer
wheel inside width. Some fixed / freewheel
also use this size to allow switching.
Okay, but what do the digits 3.2 mm and
2.4 mm indicate?
--
underground experts united
http://user.it.uu.se/~embe8573
Those are the metric equivalent of the gap inside the chains. The outside width varies by 6, 7, 8, 9, 10, 10N, 10ND, 11 gears.