I'm squeezing a Suntour Ultra - 6 freewheel into the space of a conventional 5-speed freewheel, on a Campagnolo low-flange hub between normal 120mm-spaced dropouts.
I figured out that I had to adjust the screws on the dropout adjusting bolts toward the rear, so that the teeth of the smallest cog don't hit the seatstay.
However, in the large chainring/small cog combination, the chain rubs on the seatstay, ever so slightly. I would like to use that combination some times . . .
So, what are the options?
1) Are thinner (2.7 mm vs. 3.2mm) spacers available for between the larger cogs for the Ultra? (would 1mm space make enough difference? maybe not)
2) Should I look for a 132mm or 134mm #29/R rear axle, to replace the 129mm one, (I'm assuming that this is the length of the axle, since that is the default length in the nearest-to-date Campy catalog) and add a spacer on the freewheel side, and ever-so-slightly widen the space between the dropouts?
Suggestions appreciated, and, if you happen to have a longer axle -- I'd go for the 134mm -- let me know off line.
thanks, Joel Niemi / Snohomish, Warshington bberryacres at hotmail dot com
Oh, and by the way, no problem getting my 1971 NR rear derailleur to cover 14-26.