Leaving custom cassettes aside for the moment, pretty much what they did when they went from 7 to 8 was space the sprockets closer together and add an 11 or 12 tooth sprocket. Many of the standard 7s had 13T as the smallest sprocket, and all but one of the standard 8s had either an 11 or a 12T as the smallest.
This can easily produce a situation where less (i.e., fewer sprockets) is clearly more. With a 7spd cassette mounted on a 135mm cassette hub (7spd cassettes now seem to come with the spacer you need to put behind the cassette to make this work) I find I'm able to use all 7 sprockets on the big ring without suffering chain line problems. Add an outer 11 or 12 to the mix, and now you can't get to the innermost big sprocket without running into chain line issues; in return for this, you get a high gear that's usually too high to use. Bottom line: add 1, lose the use of 2! You've just reminded me that I have a 14-32 7sp HG cassette on my 20+ year old MTB. It came with this silly 12-28. The replacement was a cheap stock Shimano part. So there are 13 & 14 tooth last position cogs out there. That's one constraint on building a custom cassette. I'm with you - 11 & 12 tooth cogs are silly unless you're racing. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
