when did the standard change
05-26-06, 01:44 PM
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when did the standard change
from 120 to 126mm drop out spacing? And then from 126 to 130mm?
Just wondering...
Just wondering...
05-26-06, 04:47 PM
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powers2b answered the "why". The "when" is all at: https://sheldonbrown.com/frame-spacing.html
05-26-06, 06:16 PM
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The "when" isn't very explicit in Sheldon's article. I bought a fairly low line Bridgestone road bike new in 1985 and I have a 1983 Trek steel frame and both have 126 mm spacing so the standard changed to 126 from 120 in or before the early '80's. I also bought a 1992 Trek Al frame road bike new and it came spaced a compromise 128 mm since the same frame was sold with 7-speed (126) and 8-speed (130mm) groups so the 130 mm standard had been introduced before then. I later purchased a 1993 Trek MTB and it was spaced 135 mm.
I'm afraid I can't pin it down much better than that.
I'm afraid I can't pin it down much better than that.
05-26-06, 08:34 PM
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I have a 122mm spaced Colnago from 1988. o_O I'm thinking maybe it's supposed to be for either 120mm or 126mm wheels, though then you'd expect 123 not 122. It's also possible that the person before me tried to respace it to 120 and failed. The previous owner treated it like ****. I heart it.
05-26-06, 08:39 PM
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A lot of "120 mm" frames were actually spaced 122 mm so I believe your frame was originally spaced as you found it. The Italian makers were slow to accept changes in frame and component dimensions so Colnago may have been a holdout for a couple of years after the rest of the world changed.
05-27-06, 08:09 AM
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Keep in mind that spacing didn't change simultaneously. Freehubs and freewheels were sold at the same time, 5sp and 7sp rear wheels were sold at the same time, and so it depends a great deal on what the framebuilder or bike manufacturer spec'd for their product.
There is comparative sanity these days. Derailleur-geared road frames are spaced 130mm at the rear hub, regardless of whether the bike has 7, 8, 9, or 10 speeds on the rear cassette. Upgrading the drive does not require doctoring the frame.
There is comparative sanity these days. Derailleur-geared road frames are spaced 130mm at the rear hub, regardless of whether the bike has 7, 8, 9, or 10 speeds on the rear cassette. Upgrading the drive does not require doctoring the frame.
05-27-06, 08:50 AM
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Originally Posted by HillRider
...I later purchased a 1993 Trek MTB and it was spaced 135 mm...
05-28-06, 02:09 PM
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Thanks for the ballpark... I am just trying to place the birth of my Basso Gap using the spacing
05-28-06, 02:22 PM
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Originally Posted by jhota
FWIW, my '90 Trek is 135 mm also.
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Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
05-28-06, 03:38 PM
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yes, but i'm sure the change to 135 mm (from 130) happened around the same time as the shift to 130 from 126...
05-28-06, 06:36 PM
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I'm not up on road bike history, but MTB rear spacing went to 135mm in 1989 with the introduction of seven speed hyperglide. I once owned a 1989 Trek 950 --- it had 135mm spacing.
