What shifters are you using?
whoa, those are some teeny tiny numbers. curious, did you use vernier or digital calipers to make your measurements, and have you verified that the instrument is properly calibrated?davep said:Running a 9 speed shifter (with a gear locked out as Veritechy's is) might work in a pinch, but it is FAR from 'correct'. Each and every shift will be .46mm too 'short'. In the furthest cog, with this set-up, your derailleur will be out of alignment with the cog by 3.22mm (with a cog to cog space of 4.8mm on an 8 speed cog, the derailleur is closer to alignment with cog 7 rather than cog 8....even though your shifter is at the 8th gear).
There is no need to measure anything...these numbers are all directly from the mfg specs for both 8 and 9 speed cassettes.boomforeal said:whoa, those are some teeny tiny numbers. curious, did you use vernier or digital calipers to make your measurements, and have you verified that the instrument is properly calibrated?
You have a problem with mfg spec??? I dont get it. I did not just make this up, there are accepted standards for parts like this (cog pitch, cogset width, cassette carrier dimensions, hub OLD width, axle diameters, BB threads and widths, chainlines, brake mounts, headset diameters and depths, steertube diameters, etc, etc. A simple search will give you all of this information right from the standards documentation.boomforeal said: