Robbie,
You were right. The 87 was originally a 6 speed. It's been a few years and I forgot about the details. When I picked up the bike for $40 from a local used bike monger, he kept the original 6 speed wheels.
I had a nice set of wheels with Shimano 600 hubs and Mavic MA2 rims. When I had the alignment checked, I had the rear triangle spread to 130mm to use the 7 speed rear hub.
The 1987 105 derailleurs plus the 6 speed SIS levers work fine with the 7 speed cassette.
Chas. verktyg
Last edited by verktyg; 03-27-12 at 07:48 PM.