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down grading from 7 spd to 6 spd
Zyggy Wrote: I have an old 7 spd Ultegra non-cassette hub and I would like to change the rear wheel to a 6 spd disk for time trialing. Is it possible to make the drivetrain compatible to the disk wheel? With minimal effort and cost, 'cause I know with a lot of effort and a lot of money anything is possible Thanx If your rear shifter has friction mode you should be OK. -- daveornee |
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down grading from 7 spd to 6 spd
Zyggy wrote:
I have an old 7 spd Ultegra non-cassette hub and I would like to change the rear wheel to a 6 spd disk for time trialing. Is it possible to make the drivetrain compatible to the disk wheel? With minimal effort and cost, 'cause I know with a lot of effort and a lot of money anything is possible Pretty much any hub that will work with a 6-speed freewheel will also work with a 7-speed freewheel. Although there's one more sprocket, the spacing between them is tighter, so the overall width is very nearly the same. See: http://sheldonbrown.com/harris/freewheels Sheldon "Odd Numbers Are Better" Brown +-------------------------------------------------+ | Search the Quality Bicycle Products Catalog | | and order on line: | | http://sheldonbrown.com/quality | +-------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
#3
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down grading from 7 spd to 6 spd
Sheldon Brown wrote in message ... Pretty much any hub that will work with a 6-speed freewheel will also work with a 7-speed freewheel. Although there's one more sprocket, the spacing between them is tighter, so the overall width is very nearly the same. What? But I want a wide ratio compact six. TJ |
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down grading from 7 spd to 6 spd
I wrote:
Pretty much any hub that will work with a 6-speed freewheel will also work with a 7-speed freewheel. Although there's one more sprocket, the spacing between them is tighter, so the overall width is very nearly the same. Trevor Jeffrey caviled: What? But I want a wide ratio compact six. "Compact" or "Ultra" 6 speed freewheels are quite unccommon, they were made to allow 6 sprockets to be fit onto a 120 mm (5 speed) hub. See: http://sheldonbrown.com/harris/freewheels.html#6u The original poster had some kind of a disc wheel. I've never heard of a 120 mm disc wheel, I'm pretty sure he has a 126 hub with a standard 6 freewheel, and I advised him accordingly. _Wide-ratio_ Ultra 6 freewheels have a reputation for very poor shifting performance, and are not generally available any more. 120 hubs have been obsolete for about 25 years. Sheldon "All Generalizations Are False" Brown +----------------------------------------------------+ | A little inaccuracy sometimes saves tons of | | explanation. --H.H.Munro ("Saki")(1870-1916) | +----------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
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down grading from 7 spd to 6 spd
on 8/4/2004 11:30 AM Sheldon Brown said the following:
Pretty much any hub that will work with a 6-speed freewheel will also work with a 7-speed freewheel. Although there's one more sprocket, the spacing between them is tighter, so the overall width is very nearly the same. If the overall width is nearly the same, can I assume a 6-speed friction shifter would have enough reach to cover the 7-speed freewheel? David dja dot mail at comcast dot net |
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down grading from 7 spd to 6 spd
_Wide-ratio_ Ultra 6 freewheels have a reputation for very poor shifting performance, and are not generally available any more. 120 hubs have been obsolete for about 25 years. Obsolete? That is a harsh word. "Superseded" may have been a better choice. As for the freewheel. Do you think he reputation was well founded? TJ |
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