Changing the rim size

1999 CADILLAC DEVILLE
116,000 MILES • V8 • FWD • AUTOMATIC
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KATEANNETTE
  • MEMBER
  • 1 POST
Mine has 16 in wheels and if I put 20in rims on it will it through off my speedometer
Feb 17, 2011 at 2:06 AM
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FACTORYJACK
  • CERTIFIED EXPERT
  • 4,159 POSTS
The wheel size is not the factor that is going to affect speedometer. What will determine the affect, is the overall tire diameter. If you used a 20" rim with a tire size that closely matched the O.E. diameter, the affect would be minimal if any.
Feb 17, 2011 at 3:17 AM