Originally Posted by cda7333
How bad did either size throw off ur speedometer? Has the bigger size messed with your ESC any? Thanks
I used a gps to determine the speedo difference. My speedo was bang on with my gps on stock tires. Both showed me traveling @ 100km/h.
But with these tires Jeep speedo is off by 4-5%.
I was traveling 100km/h according to Jeep's speedo, but gps was showing 104-105km/h.
I called dealership and they can fix this by changing the tire revolutions in the ecm, they charge half hour labor. They can only do this if the tire difference isn't very big, if the tires are even bigger then the reprogramming wont work.
I didn't bother with it, 4-5% isn't much.
And no affect on esc.