kdgreen,

the answer is right here

http://www.dakota-truck.com/TIRECALC/tirecalc.html

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2000 Silver XLT 4.6 Extended Cab

SO FAR:
- ARE Z-series Color Matched Cap (for the Rotties...)
- Flowmaster 40 Series with Edelbrock Oval Tips
- Airaid Intake System
- Sony, Lanzar, Profile, Polk, Kenwood, 500W Sound System
- Closer to the Ground 3" front and & 5" rear
- Clear Corner Lenses

WISH LIST:
- 20" Rims with 275/45/20 Tires
- Street Scene Color Matched Mirrors
- SVT Bumber Cover
- Supercharger (when Whipple has one for the 4.6)

 

I have went from factory tires (235/70/16) to a (225/60/16) tire to lower my truck. According to calculations, this is going to throw my speedo off 8%. How do I adjust for this? Will it add more miles than I am really running? Thanks,
Kevin

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Kevin D. Green

http://www.my-f150.com/kdgreen