roXor_boXor

What is the lightest wheel and tire combo you have seen for the xB2?

I found myself looking at lighter wheels and tires today. I could do even 18's at as little as 37 pounds each. That would be about 5 pounds per wheel lighter than stock steelies. Anybody got 18's that the wheel and tire combo is lighter than 37 pounds each?

uberspeed

Looked here?
http://www.wheelweights.net/

djct_watt

You shouldn't concentrate on only rotating mass... Rotational inertia is the enemy here, and mass is only a portion of the formula. It is actually possible for a smaller, heavier wheel put more power to the ground than a larger lighter wheel.

Rotational inertia is a function of mass and radius (and the larger the wheel is, the greater the amount of weight is on the furthers radii.

roXor_boXor

Nice site uberspeed. Thanks.

That makes comparing wheels easy enough.
Don't know of a place to doing similar tables with tires do you?

uberspeed

No boss, sorry.

In searching recently since I'm planning on going with 18's (18x7.5) I've put this together as a loose guideline, hope it helps.

Tire: 225/40R18 - Avg of 23lbs. Range 21-25.

What size rim/tire combo are you looking for and I'll look for it as best I can.
/attempts to not be a waste of space

roXor_boXor

Nah don't spend any time on it. I have a pretty good idea what tires I'm interested in using. I am doing a couple of trips on the stock tires in the next couple of weeks that will tell me if the change is worth it.
Thanks for the help.