Join Date: Aug 2004
Bikes: Litespeed Teramo, Argon 18 Road, Fuji Mt Fuji Pro MTB, Fuji Track Pro FG, & Cannondale Quick CX Cross
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700c is the modern standard for rim size, 32 is the tire width.
32 is already pretty fat but you can put skinnier tires such as 21-25 known usually as "road tires"
I used to own the 7.2 fx and for most (city) purposes a 700x25 is a great compromise.
I believe the fatter you can go with those rims are about 40ish and definitely you do not have change rims just tubes and tires but a second wheelset can become really handy for say a "cross tires" for dirt paths.