Question about 20 inch tires

[Ken Bowers]

When I bought my Hummer, it came with 5 X 20 inch tires mounted and four 17 inch tires unmounted (with 4 rims too).

I plan some serious up mountain, up wash, driving soon.

Which set should I use? I assume the 20 inch tires are best, but I want to hear from you experts too.

I plan to sell one set.

[Ken Bowers]

Would I get better gas milage with the 17 inch tires?

[[__--MUD--__]]

The 17" and 20" are your wheels. Tires mount on them. ;) Its impossible to answer your question w out knowing the tire size on each set.

Weight of the wheel/tire combination will effect braking. You won't feel it as much under acceleration.

[HUMTECH]

X2, need more info

[guruerror]

What exactly is "up wash" driving?