For Sale Shimano Biopace road chainrings, steel.

[M_Chavez]

Have a set of road double shimmy biopace steel rings. 52t and 42t.

Used, 52 seems to have a fair amount of life left, 42's a bit more used.
Not sure about BCD - looks oval (?) about 125mm hole centre to far hole centre.

I have absolutely no use for these - would these raise me £10 towards bike parts + £4 signed for P&P?

Thanks.

 

[pigman]

They are standard shimano fit 130bcd

 

[M_Chavez]

Thanks pigman.
Must be an optical illusion.

Am I too greedy with the valuation? Or about right?

 

[pigman]

Im not sure about price. No-one today wants them and are seen as one of Shimano's fails.
i like my 48T 110bcd biopace

Are you sure they are steel,? ive only seen them in alloy, apart from some very bottom range mountain bikes

 

[M_Chavez]

I think so. Quite heavy they are.
42T is 108g, while my 42T narrow-wide alloy chainring is about 78g.

 

[Chest_Rockwell]

They came with Exage Motion chainsets. Not the lightest but hard wearing...

exage motion chainset - Google Search

 

[M_Chavez]

Thanks - yes, the crankset is in the bin (stripped threads ds).