09-15-2009, 05:31 PM
Hi Folks, my Bike has a shimano Biopace crankset with a 52 teeth and 40 teeth chainrings, these are worn and are stretching my chain so I want to replace them. I have been able to source a 52 Teeth and 42 Teeth chainring, but unable to find a 40 Teeth chainring. Will this 52/42 combination work or should I resell the 42 and keep trying for a 40? The Biopace says "for narrow chain only", but measuring across the chain is around 7.1 mm which I think is the normal size chain which was fitted 9 months ago by my local shop - any clues as to what chain I should buy?
Thanks for the tutorials Alex, so far I've serviced my headset and replaced my pedals and repaired 3 punctures and put a new tyre on! all thanks to you!
My Bike is an old Dawes Galaxy circa 1985 and I think the crankset is probably original.
Thanks for the tutorials Alex, so far I've serviced my headset and replaced my pedals and repaired 3 punctures and put a new tyre on! all thanks to you!
My Bike is an old Dawes Galaxy circa 1985 and I think the crankset is probably original.