Bicycle Mechanics - mixing chain rings
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02-13-12, 12:02 PM
I want to put a 39t round inner ring on my oval biopace crank set.The bcd is identical.Is that acceptable?Can I expect any problems?The original ring is 42t and I could use the help on the hills.
02-13-12, 01:36 PM
In the days when oval/biopace rings were common it wasn't unusual to find them that way from the factory. I still have a Sun Tour labled crank that ismoval, oval, round on the big ring and have put together sets will mixed rings without problems. Roger
02-13-12, 02:25 PM
Not unless you are in love with the Bio-pace rings.
02-13-12, 02:35 PM
Ive never had a problem when replacing biopace with a normal chainring.
02-13-12, 02:40 PM
40T 130BCD Biopace rings are rare, but sometimes come up for sale. A cassette swap could help, too.
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