Bike Forums - View Single Post - Cassette and Rear Derailleur Question

07-31-10 | 05:57 AM

#13

Retro Grouch

Senior Member

Joined: Feb 2004

Posts: 30,225

Likes: 649

From: St Peters, Missouri

Bikes: Catrike 559 I own some others but they don't get ridden very much.

Quote:

Originally Posted by vincejohnston

Thanks everyone for the suggestions. I found a Sugino 26t chain ring on Amazon for less than 20, so I think I'll grab one and give it a try. One other question, on order to get a Jump stop I need to know what my seat tube diameter is. Is there an easy way to measure the down tube size without a caliper? I know the seatpost is a 27.2 if that helps. Thanks again, Vince

1. Wrap a piece of paper around it and mark where it overlaps. Measure carefully in millimeters. Divide by 3.14.
2. Gently clamp an adjustable wrench around the tube. Measure the distance between the jaws.

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