 |  | | | |  | |  |  | Rear Dropout Width of 85-86 Professional |  | |  |  | |
 Posted: Sat Jan 26, 2008 10:11 am |
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| verktyg |
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| Joined: 14 Jan 2007 |
| Posts: 2814 |
| Location: SF Bay Area |
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Stephan and other Professional owners, what's the rear dropout width on a 1985-86 Professional frame?
My frame is at a local frame builder's to have the alignment adjusted. The forks are off by at least 1/8" (3mm). We didn't check the rear width carefully but it seems to be around 128-130mm.
Most frames even some custom built ones are not aligned very well. I check the alignment on all of my frames before assembly. "Cold setting" alignment can make a world of difference in how the bike handles.
The rear hub widths varied from year to year with some manufacturers during the late 70s through the 1980s. It wasn't standardized until Shimano took the the bull by the horns when they brought out their SIS index shifting.
Here's what I've seen published for road bikes:
5sp - 120, 121mm
6sp - 125, 126mm
7sp - 126, 127, 128, 129mm
8sp - 128, 129, 130mm
Post Shimano SIS "standards" for road bikes
5sp - 120mm
6sp - 126mm
7sp - 126, 130mm
8sp - 130mm
9sp and 10sp becomes a can of worms again with 130mm and 135mm widths being produced.
I have a nice set of almost new wheels with a 126mm wide Campy Victory rear hub and the correct Mavic rims for the 85-86 Professional.
If I have the rear dropouts set to 130mm then I'll have to put in a longer rear axle and re-dish the rear wheel. The Victory hub with a 130mm rear axle is an invitation to bend or break but I'll be able to use 130mm wide freehub wheels if I wanted to.
Chas. |
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| Posted: Sat Jan 26, 2008 2:57 pm |
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| Paul Wiseman |
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| Joined: 09 Mar 2006 |
| Posts: 584 |
| Location: Brisbane, Australia |
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G'day Chas
I have 4 bikes from that period. One Professionnel, one defi, and two victoires.
The Professionnel was in mint condition when I rec'd it from Sandman. It has unstamped tips, but they are almost certainly Vitus. Spacing was 126mm on the dot.
The Defi also had 126mm spaced Vitus tips, but they had been stretched to a shade under 127mm, by a badly spaced axle.
The Victoires, had flat stamped tips that were all over the cook shop. If anyone is still riding a low end model from that period, please check both front and rear drop outs regularly. They had a tendency to crack. |
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Wisey
Brisbane, Australia
1974 Paris - Nice
1985 Defi
1985 Victoire
1985 Victoire (yes, another one!)
1985 Professionnel |
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