Tire size questions

[Apex IV]

I have 37 x 13.50 x 17's on one of my H2's, 37 x 12.50 x 17's on another and the other two have stocker tires. The 37 x 13.5's are about an inch and a half taller than the BFG 37 x 12.50's and about that much wider. I've been out of the country for a while, which is why I have not been able to post, but if you search by my user name (apex4), you may find some pictures I posted when I installed the 13.50's. I live in a moderately hilly area, so I notice the change in "effective" gear ratio with both of the 37's - more so on the 13.50's (they are actually taller than the BFG 37's and wider, so they also weigh considerably more.) We did the intake/chip/exhaust on all four H2's and that helped some, but not enough on the ones with 37's. Ended up supercharging one with the larger tires and one with the stockers - Big improvement and about 3 mpg better on the one with 37 x 13.50's. Slight decrease on the one with stock tires. Both more fun to drive... :-)

Hope this helps!

-Randall Garrett-
Apex Software

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