Smallest inner chainring for standard Shimano crank?
05-26-08, 12:32 AM
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Smallest inner chainring for standard Shimano crank?
I am building up a 1994 Serotta Colorado TG frame and have become interested in compact cranks. Since I already have an extra standard Shimano crank and a 50t outer ring, I am wondering if I can get a 36t that would fit or if 39 is as low as I can go.
Thanks
RFC
Thanks
RFC
05-26-08, 12:44 AM
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Compact cranks are typically 110 BCD (bolt circle diameter). Standard double cranks are typically 130 BCD (for Shimano). So do a search for 130 BCD chainrings and see how small of a ring you can find.
05-26-08, 01:03 AM
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smallest 130bcd ring is 38T
I think FSA makes one
If you want any smaller, you have to go with a compact 110bcd and quite possibly a new BB to match the compact crankset, unless you can find a compact crank to match your current BB.
I think FSA makes one
If you want any smaller, you have to go with a compact 110bcd and quite possibly a new BB to match the compact crankset, unless you can find a compact crank to match your current BB.
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
