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K. Wiggins
K. Wiggins, Chevy Technician
Category: Chevy
Satisfied Customers: 2514
Experience:  ASE Certified Technician AA in automotive Technology, 15+ years in the trade
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What kind of problems will i run into if i changed the wheel

Customer Question

what kind of problems will i run into if i changed the wheel size from 16" to 18 " or even 20" wheels I have a 2007 chevy duramax.
Submitted: 5 months ago.
Category: Chevy
Expert:  K. Wiggins replied 5 months ago.

There's a couple of things that will happen when changing to a larger wheel

1. Speedometer becomes off

2. Rear gear ratio is effectively changed

3. ABS/Traction control will most likely not function properly

The above can be avoided by doing what is called "plus sizing" It's where a tire is used with the new larger rim so the diameter is the same as the old rim and tire.

I'll post some more info about it here