Calibrating for new 18" rims and tires with Xcal II help please.

[astronut1885]

Hi guys. Wednesday my new 18x8.5/9.5 rims will be coming in and getting installed. The rear tire will be a 285/35/18. What I need to know is what value to set my speedo to with my XCalII. It's set up for revs/mile, not just tire size. So if anyone knows, I'd appreciate it so I can be ready when they get here.
Thanks!

 

[97speedster]

Check with the manufacturer for this info. Some web sites have this info posted for each size tire they sell. Try the Tire Rack I know they list but it depends on what brand as they vary.

 

[astronut1885]

Ah. These are BF Goodrich KDWIIs

 

[astronut1885]

I found it at tirerack. Thanks a mil!