That’s interesting. I have an ST600 with a July 1990 production date that has 130mm spacing.I'm curious if anyone knows when the rear spacing went from 126mm to 130mm to 135mm? I have a 90 ST1000 at 126mm, and a 98/99 T700 at 135mm. I'm guessing something may have changed around 94 as that looks like the first year they had replaceable derailleur hangers.
The hub width is based on number of gears intended for use on the freewheel or cassette. So as the industry went through the progression of adding more gears the spacing became wider and wider. Higher end bikes used the newest styles, and cheaper models stuck with the old stuff, so frame spacing wasn't the same across the whole product line for any given year. You need to look at the catalogs for whatever model you're interested in and go through every year and see what drivetrain was offered then make a chart. Anyone interested in doing that?
126mm is for 7 spds., 135mm was 8spd. and up. Cassette clusters can vary in widths by manufacturers. A Shimano 9spd. cassette is 36.5 mm wide, A Campy is 38.2mm. Nothing is standardized, although I think that Sram and Shimano are the same overall width, though their sprocket and spacer widths are different.
I was wondering if you might post a few pictures of your 1990 ST1000 on either this thread, or on the Gallery page? There are no pictures of that year and model on this site, and I'd love to see it.I'm curious if anyone knows when the rear spacing went from 126mm to 130mm to 135mm? I have a 90 ST1000 at 126mm, and a 98/99 T700 at 135mm. I'm guessing something may have changed around 94 as that looks like the first year they had replaceable derailleur hangers.
Yep you're right, that hub came in 130mm and 135mm lengths for 7sdp. cassettes. Looking at the 1990 catalog only the SR2000 model had 8spd. everything else was 7.
Here are the listing photos of the ST1000, along with the serial number, and finally as I have it built up. I believe very little was changed from stock before I acquired the bike. Now, very little is original and the original parts have been scattered to the winds via sales. It's also interesting to note that the XC Comp crankset seems to be the same as the XC Pro. The markings on the back of the crank arms (not pictured) are the same. The Nitto stem also has "Pat. Pending" engraved on the triangular locknut for the stem bolt.I was wondering if you might post a few pictures of your 1990 ST1000 on either this thread, or on the Gallery page? There are no pictures of that year and model on this site, and I'd love to see it.
And that's the bike that started this whole thread!