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Is Frame spacing for 7 Gears = to 5 Gears?
Hi there.
My sister who lives 400+ plus kilometres from me wants me to overhaul and upgrade her old NORCO Fiori bicycle. It is a 10 gear setup. She wants to go to 21 gears because ofthe hills she is encountering and also to reduce the jumps between gears. I have everything I need to convert this bicycle to 21 gears for her. I can't remember if the distance between the rear dropouts is the same for a 7 gear Shimano 600 hub and a regular 5 gear hub. Is it the same distance for both a 5 gear and a 7 gear hub? Thanks and cheers from Peter |
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Is Frame spacing for 7 Gears = to 5 Gears?
wrote:
My sister who lives 400+ plus kilometres from me wants me to overhaul and upgrade her old NORCO Fiori bicycle. It is a 10 gear setup. She wants to go to 21 gears because ofthe hills she is encountering and also to reduce the jumps between gears. I have everything I need to convert this bicycle to 21 gears for her. I can't remember if the distance between the rear dropouts is the same for a 7 gear Shimano 600 hub and a regular 5 gear hub. Is it the same distance for both a 5 gear and a 7 gear hub? 5-speed spacing is 120mm, but 5-speed freewheels have frequently been used on cheap department store type bikes with wider spacing. The original 7-speed systems were made for hubs with 126mm spacing, but 7-speed has also been standard with 130mm and 135mm spacing. To my knowledge, everything with 7 speeds and branded Shimano 600 rather than Shimano Ultegra is spaced to 126mm. Chalo |
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Is Frame spacing for 7 Gears = to 5 Gears?
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Is Frame spacing for 7 Gears = to 5 Gears?
On Apr 12, 5:27*pm, AMuzi wrote:
wrote: My sister who lives 400+ plus kilometres from me wants me to overhaul and upgrade her old NORCO Fiori bicycle. It is a 10 gear setup. She wants to go to 21 gears because ofthe hills she is encountering and also to reduce the jumps between gears. I have everything I need to convert this bicycle to 21 gears for her. I can't remember if the distance between the rear dropouts is the same for a 7 gear Shimano 600 hub and a regular 5 gear hub. Is it the same distance for both a 5 gear and a 7 gear hub? Fives were traditionally 120mm. Late series five bikes were built to 126mm for use with 5 or 6 speed wheels. Early sevens were proprietary, often 128mm but quickly settled on 130mm. Make it 130 and you'll be fine with modern equipment. If you use a Shimano MTB format CS ub (basic models are still quite affordable) at 135mm, simply remove the 5mm left side spacer before building the wheel. If your hub has the modern 8-9-10 cassette body, use the 4.4mm spacer behind your seven cassette. A seven freewheel hub wants 38mm of gear space. -- Andrew Muzi * www.yellowjersey.org/ * Open every day since 1 April, 1971 Thanks Andy. The Shimano 600 7 gear hub I have is already built into a wheel. It is the old style that needed the special tool (not just an Allen Key) to remove. IIRC it is an N600 hub. It is not the older 600EX hub. It has a cassette body that can take 8 cogs and spacers of a 9 gear cassette. I will be using 7 cogs from an 8 gear cassette cluster so I can use the 7 gear shifters I have in the parts bin. This hub has a large Bunion(?) on the cassette side that tapers to the standard hub diameter at the centre and left side of the hub. I guess it will fit with perhaps a very slight spreading of the dropouts. Cheers from Peter |
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