Tandem Cycling - Big ring

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oldacura

04-08-09, 01:24 PM

We have a 1998 Co-Motion Co-Pilot with a Ritchey (Sugino?) crank. Crank is a square-taper with 54/44/32 rings. The 54 is a TA and has no ramps or pins. When the ring was fairly new, up shifting to the big ring was OK. It now has maybe 2000 - 3000 miles on it and has recently got very balky at upshifting. I've adjusted the front derailer as best I could and replaced the chain but to no avail.

Does anyone know of a source of 110mm BCD rings with 52 or more teeth that have ramps & pins?

This one I got from Harris Cyclery and I emailed them but have not yet heard back.

rmac

04-08-09, 02:05 PM

Did you try Wiggle? They have pretty good prices on TA middle and large rings with ramps and pins.

oldacura

04-09-09, 01:05 PM

Thanks for the tip but Wiggle didn't have the right ring.

Harris Cyclery emailed back and they do have the right ring - a TA 110 BCD x 54 tooth ring.