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COG CONFUSION? 7/8/9 speeds - Gavin Donahue
Bike Friday has used a variety of industry cassette standards.
First there was 7speed. This standard was expanded to
8 speeds by using a wider cassette drive body and adding
the 8th cog. The chain width and shifter indexing spacing
stayed the same, but one more shift point was added to
the shifters. The component makers then developed narrower
cogs and chains so that 9 cogs could fit on the 8-speed
drive body. This is termed 8/9 speed spacing. The narrower
9 speed chain works well on both, but the 7/8 speed chain
will not work on the 9 speed cogs, as it is too wide.
Additionally, the 9 speed cassette spacing requires the
narrower 9 speed shifter indexing spacing. A persistent
point of confusion... MORE |
A BENT FOR TRAVEL
The Bike Friday Recumbent Tandem - By Lynette Chiang
We've had an outstanding response to our call for Beta Testers for the TwoEasy,
now code named DoubleDay (we had a large uprising of people telling... MORE |
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