Tire Size Calculator

[surebuttercringe]

Thought I would share this website with everyone that I used for hours when trying to determine what tire size to put on my truck. I really like that you can physically see what it's going to look like on the wheel and the charts at the bottom that tell you what differences you'll see in spacing and speedometer.

 

Used 265/65/18 with 8 in. rim width and 31 offset for stock size for my truck (LT Z71 with All-Star).

 

http://www.rimsntires.com/specspro.jsp

[JonRyan]

I've used this for about two hours now haha. I bought a 2.25" Ready lift level. Does anybody know if I could fit Nitto Trail Grapplers 295 x 60 on Rockstar II 20X9s (offset of -12mm and 6-139 bolt pattern.) I have the LT z71 All Star with 18s right now. I haven't put the ready lift on yet until I know this set up would work. I have no idea what I'm doing.

[kstruckcountry]

I have an app for my phone that does it. Very handy

[surebuttercringe]

I've used this for about two hours now haha. I bought a 2.25" Ready lift level. Does anybody know if I could fit Nitto Trail Grapplers 295 x 60 on Rockstar II 20X9s (offset of -12mm and 6-139 bolt pattern.) I have the LT z71 All Star with 18s right now. I haven't put the ready lift on yet until I know this set up would work. I have no idea what I'm doing.

 

You will be close. I know others are running 295s on stock wheels with a little rubbing.

[JonRyan]

I guess according to Ready lift's site it wouldn't be possible.

CHEVY/GMC SILVERADO/SIERRA 2007-2014 2WD/4WD - 6 LUG 2.25" 33"*** 33" x 11.5" 9" 5.5"

66-3085

33" x 11.5" is the max diameter and width if I am reading that chart right.

[surebuttercringe]

BTW, I had the wrong offset listed in my first post. LT Z71 18" All Star wheels have a +24 offset, not +31.

[JonRyan]

I need more lift I guess haha. dia. width

LT275/65R20 E126Q 206-600 19.1 34.33 10.98 7.5-(8.0)-9.5

3750

@

80

LT285/55R20 E122Q 206-830 18.9 32.60 11.69

It is such an aggressive tire, but the top one is too tall for the lift and the other too wide.

[xranger90]

Thanks for this helpful tool.