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Old 02-13-12, 12:02 PM   #1
trek330
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mixing chain rings

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.
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Old 02-13-12, 01:36 PM   #2
rhenning
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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
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Old 02-13-12, 02:25 PM   #3
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Not unless you are in love with the Bio-pace rings.
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Old 02-13-12, 02:35 PM   #4
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Ive never had a problem when replacing biopace with a normal chainring.
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Old 02-13-12, 02:40 PM   #5
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40T 130BCD Biopace rings are rare, but sometimes come up for sale. A cassette swap could help, too.
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