Tire Sizes

rtrogers

New member
Dec 29, 2016
11
0
0
18" by 9" rims. I want a total of 33 inches from the ground to the top of the tire. What size tire? 305? 315?

Thanks.
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,681
5,835
113
Phoenix Az
18" by 9" rims. I want a total of 33 inches from the ground to the top of the tire. What size tire? 305? 315?

Thanks.

find a metric tire size caculator and start plugging figures in on available tire sizes. none are a "true" 33" tall. they will be over or under that figure

305 and 315 are the actual width of the tire in MM, not the size. size comes from the aspect ratio which is a percentage of the tire width to create the side wall height.
 

Awenta

Active member
Sep 28, 2014
4,090
2
38
CT
What kind of tire do you want? Find a tire look at the sizes and google tire size calculator and it will tell you how tall it is. It's not rocket science.

33x12.5 would be a good choice



Hahaha


Sent from my iPhone using Tapatalk
 

8lug

Escalade HD
Oct 16, 2009
175
0
0
Canada
255/70R18 32.1x10R18 32.1"-2.7%
275/65R18 32.1x10.8R18 32.1"-2.7%
305/60R18 32.4x12R18 32.4"-1.8%
265/70R18 32.6x10.4R18 32.6"-1.2%
285/65R18 32.6x11.2R18 32.6"-1.2%
33X12.5R18 33.0x12.5R18 33.0"Equal
*33X13.5R18 33.0x13.5R18 33.0"Equal
*33X13R18 33.0x13R18 33.0"Equal
295/65R18 33.1x11.6R18 33.1"+0.3%
275/70R18 33.2x10.8R18 33.2"+0.6%
325/60R18 33.4x12.8R18 33.4"+1.2%
305/65R18 33.6x12R18 33.6"+1.8%
285/70R18 33.7x11.2R18 33.7"+2.1%
*34X12.5R18 34.0x12.5R18 34.0"+3.0%
 

rtrogers

New member
Dec 29, 2016
11
0
0
Thank you. Read a quick synopsis on tire sizing and understand now. Please excuse me, I've only ever run stock tires and rims for work and travel; just recently needed more clearance. I don't spend my existence worrying about how to make my duramax look big and pretty. I don't drive it to attract attention, it needs to be functional.
 

rtrogers

New member
Dec 29, 2016
11
0
0
255/70R18 32.1x10R18 32.1"-2.7%
275/65R18 32.1x10.8R18 32.1"-2.7%
305/60R18 32.4x12R18 32.4"-1.8%
265/70R18 32.6x10.4R18 32.6"-1.2%
285/65R18 32.6x11.2R18 32.6"-1.2%
33X12.5R18 33.0x12.5R18 33.0"Equal
*33X13.5R18 33.0x13.5R18 33.0"Equal
*33X13R18 33.0x13R18 33.0"Equal
295/65R18 33.1x11.6R18 33.1"+0.3%
275/70R18 33.2x10.8R18 33.2"+0.6%
325/60R18 33.4x12.8R18 33.4"+1.2%
305/65R18 33.6x12R18 33.6"+1.8%
285/70R18 33.7x11.2R18 33.7"+2.1%
*34X12.5R18 34.0x12.5R18 34.0"+3.0%

Appreciate that