Jakowski321

how much will my speedometer be off if i go from a stock tire to a 31 inch tire. will it be enough to care about?

jmm0122

Mine is off 4-7mph after 60.

mcssls

same setup reads 71 when my speedo is at 65

1996XJSport

Not enough for me to care. I was suprised at the fact that it didnt adjust too much after the tires. I don't think anything of it anymore. If you're worried about cops and whatnot, get a good radar detector. I'm running an 8 year old whistler detector that I found in my garage and it picks up cops that are farther than I can see! I drive fast every once in a while so it helps out

rikinwyoming

put a tomtom gps in my rig which displays speed,,, so no worries no matter what tire size I run

mike.2492

I run 31's and the actual speed is 8% faster than whatever the speedometer reads. When the speedometer reads 65 your actual speed is about 70.

1996XJSport

Now you have me worried... I don't want my XJ to rack up the miles too quickly so if I ever do sell it, it'll have more than the actual mileage.

jmm0122

You can always change the speedo gear so your recorded mileage is correct.

1996XJSport

True, I'll probably wait till spring to do it though. I really wish my XJ could recalibrate like how digital odometer equipped vehicles can

SteelBlue99

It's actually the opposite. With bigger tires, you're going further then your odo reads. So you'll actually have less miles.

BLACKSPORT

Just about to say that. No good when reading mapquest directions and the turn come up a lot sooner haha. If i would leave my gps in the jeep more often i wouldn't have to worry about it though now would i lol.