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Old 12-13-2015, 06:52 PM
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a_dam a_dam is offline
Motorized Bicycle Elite Member
Join Date: Feb 2009
Location: Momence, IL
Posts: 349
Default Re: New Project- Vintage Motorized Bicycle!

You can look at the tire to find tire/rim size. Old, crunchy tires might be impossible to read, but the newer (70's) ones you got should be in good enough shape to read - or I wouldn't ride em!

27 inchers should have a 630 in the size, like 32-630. Older "26 inch" tires could be a lot of different sizes. Most mountain-bike tires are 559mm by some inch width - like 26 x 2 1/4. But old road bikes had sizes like 591, and if you get the wrong "26 inch" tire, it won't fit. I don't know about 24-inch sizes.

You'll want to find out the size for buying tires and to figure out gear ratios/ rpms.

No matter what the 3-speed rear hub does, that motor looks like it could get you moving to a good speed. I rarely break 15mph when pedalling, but when the motor's on, I'm always going +20.

Keep us up on your build progress and good luck.
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