2002 Wheel size

[Marky Dissod]

I’m currently running the stock rims and tire on my 2002 Yukon and they are at the end of their life.
I’m wondering if a set of rims and tires 255/70R18 would fit without rubbing.
The rims have the same bolt pattern but I would need to add a hub centric ring which wouldn’t be an issue.

When I bought my '02 Tahoe Z71 a year ago, it came with 265/65R18.
The wheels were OE GM RPO UHN: 18" x 8.5". No hubcentric ring of any kind needed.

Sitting still on the ground, 0.5" clearance or less between the tires and the wheelwells when the wheels were turned fully left or fully right.
Hit a bump mid-turn, however, occasional evidence of the tires' corners making light contact with the wheelwells.

That's actually why I switched from 265/65R18 (31.56" tall) to 255/70R18 (32.05" tall).
Now it's 1.5" clearance or more, everywhere.

Here's my favorite simple tire calculator:

https://www.angelfire.com/pa5/carclub/tiresize.html

 

[dinoedwards]

I use Tire Size Calculator they show side but side and rpms, Marky is that backwards? I'm running 265 65 18 and they are same as 265 70 17 no rubs.

 

[Marky Dissod]

I use Tire Size Calculator they show side but side and RpMs, Marky is that backwards?
I'm running 265/65R18, and they are same as 265/70R17 no rubs.

When I bought this '02 Z71, it came with 265/65R18 (31.56"). Driven normally, no rub.
The way I drive (I'd've preferred a PPV), OCCASIONAL rubs at full steering lock.

My RPOs show it originally came with 265/70R17 (31.60"), by the way; no experience with these.

255/70R18 (32.05") does not rub because, at full lock, the tires' 'corners' are a lil bit further away from the body.

Given how little I offroad (presently) I'm considering 235/60R18 (29.10") or 255/55R18 (29.04").
I'll likely decide this November.

 

[Scott in AZ]

I upsized my 2001 from 16” to 18” wheels and 275/60R-18 tires and the speedometer is absolutely dead nuts on, measured with GPS.