on 8/11/09 9:31 AM, Thomas Lynn Skean at thomaslynnsk...@comcast.net wrote:
> Does anyone have direct experience with any of the specific IRD > freehweels sold by RBW used with Shimano 8-speed indexing? I've been > told (and believe) that the spacing between the cogs of the 7-speed > freewheels (and maybe the 6-speed freewheels as well, but I don't > remember the exact question/response text) is the same as the spacing > expected by Shimano 8-speed shifters. > > However, I'm not confident that I've thought through any potential > gotchas of trying to use the freewheels with my current shifting set- > up. I don't mind the notion that one or two "clicks" of my indexing > shifters will basically be dead. I'm assuming that I can set up the > derailer to avoid the chain actually going too far inboard or > outboard, as needed. But I don't know anyone who's actually done it. With an indexed system, the limit screws on the derailleur are largely redundant. NOT that I'm recommending ignoring the setting, but that the shifter actually determines the range of the derailleur. Of course, if the cable slips or shifter fails, it could introduce dangerous slack into the system. I still set up the limit screws first, before a chain is installed. > In case it matters... the shifters I'd be using are either Shimano > EF-60 Rapid-Fire trigger shifters or the Shimano 8-speed bar-ends sold > by RBW (mounted on Paul Thumbies). The rear derailer would be either a > Shimano Acera or a Shimano Rapid-Rise Deore (LX?). The hub would > definitely be a RBW-sold 135mm 36H Phil 7-speed freewheel hub (out of > the constellation of concerns to consider, axle-strength is not one > I'm worried about). AASHTA - General Freewheel info: http://www.sheldonbrown.com/freewheels.html Durace Compatibility and Shifting Hacks: http://www.sheldonbrown.com/dura-ace.html#indexing Sprocket spacing difference on standard 6 to 7 is 5.3 to 5.0 mm's, which may be unnoticeable. But, the 7 sprocket, 8 speed shifter hack has been done many times. Have fun! - J -- Jim Edgar cyclofi...@earthlink.net Cyclofiend Bicycle Photo Galleries - http://www.cyclofiend.com Current Classics - Cross Bikes Singlespeed - Working Bikes Your Photos are needed! - http://www.cyclofiend.com/guidelines "I thought the idea was to waste the rest of our lives together.." -- Cyril, "Breaking Away" --~--~---------~--~----~------------~-------~--~----~ 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 rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
