D
Derek Mark Eddi
Guest
Hi Folks,
I'm trying to upgrade my early nineties Basso Gap road bike, which has a 126mm rear wheel spacing.
I have a Dura Ace drivetrain on this bike, and Dura Ace SIS-capable bar end shifters.
Unfortunately, the back wheel has a SBI hub with a Regina 7-speed freewheel, and it's incompatible
with Shimano SIS. I can use it with the friction setting on the shifter, but the shifting is lousy.
The chain easily rides on top of the freewheel gears unless you tweak the shifter sightly one way or
the other. It's also difficult to downshift on a significant grade.
I'd rather not scrap this bike and replace it because it's in very good shape, and fits well. I'm
considering two options:
1. Finding a replacement freewheel that is SIS compatible.
2. Frame bending to fit a more up to date wheelset with a SIS-compatible freehub.
For #1, I looked on Harris Cyclery's pages and can only find SIS compatible freewheels that go up to
28 teeth or larger. The chain wrap on the Dura Ace RD limits it to 27 teeth max. I haven't seen
something smaller so far that is SIS compatible. If there was, I'd be set!
For #2, this is of course more $$$. The wheels I have are very good and I'd rather not replace them.
I'm not too worried about frame alignment issues if I spread the stays though. The Gap frame has
rear wheel position adjusters if it turns out to be slightly off.
Does anyone remember a better solution for this problem?
Thanks for any help.
-dreq
I'm trying to upgrade my early nineties Basso Gap road bike, which has a 126mm rear wheel spacing.
I have a Dura Ace drivetrain on this bike, and Dura Ace SIS-capable bar end shifters.
Unfortunately, the back wheel has a SBI hub with a Regina 7-speed freewheel, and it's incompatible
with Shimano SIS. I can use it with the friction setting on the shifter, but the shifting is lousy.
The chain easily rides on top of the freewheel gears unless you tweak the shifter sightly one way or
the other. It's also difficult to downshift on a significant grade.
I'd rather not scrap this bike and replace it because it's in very good shape, and fits well. I'm
considering two options:
1. Finding a replacement freewheel that is SIS compatible.
2. Frame bending to fit a more up to date wheelset with a SIS-compatible freehub.
For #1, I looked on Harris Cyclery's pages and can only find SIS compatible freewheels that go up to
28 teeth or larger. The chain wrap on the Dura Ace RD limits it to 27 teeth max. I haven't seen
something smaller so far that is SIS compatible. If there was, I'd be set!
For #2, this is of course more $$$. The wheels I have are very good and I'd rather not replace them.
I'm not too worried about frame alignment issues if I spread the stays though. The Gap frame has
rear wheel position adjusters if it turns out to be slightly off.
Does anyone remember a better solution for this problem?
Thanks for any help.
-dreq