Hey Guys,

I just bought a set of the 22x10 srt replica wheels and paired them up with a 305 45 22 tire. I had a question when it comes to using the superchips flashpaq to reprogram the speedo. I noticed the OD of the tire i am using is 32.8 in inches however the superchips only give diameter sizes in increments of 25 so i have it programmed to 32.75 but it still seems quite a bit off, is it better to do the 32.75 or 33? I am ok with it being a couple of mph's off but not like 10.

Thanks.

Steve K.

 

Some folks have mentioned have to fiddle with the settings to get the speedo to a degree of accuracy. I used my GPS to determine the error. I just live with it. My 285/70x17s make the speedometer about 4.3% low. The odo is about that much off, too.