I've worked with many, many Shimano cranksets that came stock with Biopace rings; all took the standard 110/130 BCD round rings with no problems.
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(always looking for 40t/130 and 50t/110 Biopace rings)
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You know it's going to be a good day when the stem and seatpost come right out.
(looking for a picture and not seeing it? Thank the Photobucket fiasco.PM me and I'll link it up.)