biopace chainrings

[nuovo_record]

are all outer biopace rings the same BCD of 130mm? regardless of when they were made?

 

[fossyant]

Should be, unless MTB rings, they are 110

 

[PpPete]

I saw a 74mm BCD one on Ebay recently, I think it was a 28T

 

[nuovo_record]

ok, theres a couple on ebay..these look good for a pair

http://cgi.ebay.co.uk/Shimano-Biopa...sure_cycling_bikeparts_SR?hash=item27ade1d3f9

 

[e-rider]

....if it has less than 38 teeth is can't be 130mm BCD

 

[mickle]

Why the f do you want Biopace chainrings when proper round rings will fit your cranks?

 

[Norm]

I love them and, if Sheldon rates them, I won't argue.

 

[mickle]

Sheldon? Who he? Have you considered Egg rings by Highpath Engineering?

 

[jimboalee]

I skimmed mine into the canal.

 

[Dave5N]

I skimmed mine into the canal.

How many bounces?

 

[Sheffield_Tiger]

I've got some, but am giving them away. Always wanted them for the novelty, but never could get on with them when I tried them out whilst all the rage.

Someone gave me a Dyna-Tech 500 which had Biohazard, erm, I mean Biopace rings in decent (tatty but straight) nick, shame it's a 23" frame

My assistant at work is near to the 7' mark so once I've restored it, it's his for the price of the tyres and tubes.

 

[nuovo_record]

Why the f do you want Biopace chainrings when proper round rings will fit your cranks?

i'm a campag fan, my friend wants some for originality on his australian REPCO.
they were £11 for the pair and far better condition than his present ones. when he has more cash he will but a new chainset

 

[nuovo_record]

ooh and does anyone have a diagram on the correct orientation of these damn things?