Tire Size/Weight increase affects...

I'm looking to replace the 30x9.5x15 tires on the Jeep Wrangler with...

31 x 10.5 x 15

I noticed that both AT's and MT's (Looking at Kumho Venture at tirerack.com) weigh about 5 lbs more per tire with the size increase.

The Jeep is a 2000 with a 4.0 6 cyl and 5 sp manual. Not sure what the gear ratio is though (it came with the 30" tire package). The wheels are stock Canyon's.

Couple of questions...

Will this setup rob alot of power?

Will fuel comsumption increase dramatically?

How will this affect my speedo readings?

And which handles better in snow/ice? the AT or MT ? I assume the AT is a better road/commute tire than the MT.

Thanks!

it will not rob you of TOO much power, but it will feel more sluggish off the line because of the lower effective gear ratio.

It should actually get better gas mileage.

and yes, your speedometer will read a few mph lower than you are actually going, especially at high speed.

AT's and MT's tend to perform similarly in snow. The large tread blocks that make the MT's better in mud tend to do very little on snow and ice. On ice AT's can actually be better.