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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
67,924 Posts
You need to know the bolt pattern, offset, original tire outside diameter, possible brake parts interference.

Engine, transmission, and speedo calibrations are based on the original tire outside diameter. A 20" wheel won't leave much air/rubber between the wheel and ground ...... rough ride.

Here's some homework - 1992 cadillac deville tire wheel specifications - Google Search

Specifications can be checked in

Welcome to CF !!! (I moved this from the relatively dead generic Suspension forum)

Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
19,059 Posts
Will 20 in rims and tires for a 92 Devile?
sure - ASSUMING you get the CORRECT bolt pattern - offset - and width -

the problem is maintaining the OVERALL DIAMETER of the TIRE -

your original tire size is 205/70/15 -
what you are doing is swapping the outside diameter of the wheel and the inside diameter of the tire -

the OUTSIDE diameter is 26.3" - and must stay the same -
the original tire sidewall is 5.6" tall -

by changing the 15" wheel to a 20" wheel -
the sidewall of the tire MUST be drastically reduced by 2.5"
so the overall diameter stays the same -

you'll need to find a set of RUBBERBAND tires -
225/35/20 size tires would fit -

there is a reason you find these DONK wheels cheap on craigslist -
usually 3 of them are used - one looks new - and one tire is new -
hit a SMALL pothole = bent wheel and blown tire -
this WILL DESTROY the ride - you'll feel EVERY cigarette butt you drive over -
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