Hi all,

It's getting to be time to replace the 14 inch tires on my 85
Westfalia.  So I'm thinking about an upgrade to 15 inch wheels.  I
know on my hybrid bicycle the tires are much narrower than on my
mountain bike, and the rolling resistance is much lower (empirical
testing from an arts student!).  So I'm wondering how moving to larger/
wider wheels and tires would affect my fuel economy.

Thanks in advance
Jeff in Winnipeg (hey summer just arrived!)