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Discussion Starter · #1 ·
So I'm installing the Rough Country 5" lift soon. I'm very much planning on putting 305 trail grapplers on my truck. I'm wondering what size width or whatever you call it to fit my stock rims? I have a 2010 sierra slt all terrain. Badically, 305/??/18
 

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305 is your width. The center number (65,70,etc.) is the height/distance of the sidewall as reflected as a percentage of the width. So the width of your tire would be 305cm with a sidewall that is 70% of 305cm, or about 213cm.

Hope I got that right and helped clarify things a bit for you.

Happy Trails.

Sent from AutoGuide.com App
 

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do the 295/70R18...thats what im going with on my 3.5+1.25 body...tires should be here today n when i get off my ass to install my BL lol...but i run 305/65R18's now n they are 2 small.

your on the right track Duxx...if you take 305/25.4(mm per inch) = 12.007874 if you take we will say for instance my size the 305/65R18

65% of 12.007874 = 7.8051181"
that is the distance from the top of the rim height to the top of the tire...(so add this together because u also have the bottom part of the rim to the bottom part of the tire) so 7.8+7.8+18=33.605" tall tire (dont forget you have a rim in there in this case 18)

so this will be a tire that is 33.6 X 12 X R18

but with the width that the 5" kit will push out your front end a 11.6" wide tire wont look bad at all. it will looks awesome or do a 325/65R18 to make it looks beefy as heck!
 

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Discussion Starter · #5 ·
So what I'm wondering is if I get wider tires, do I have to worry about bubbling and uneven wear? I'm thinking 295's or 305's. Maybe even considering v-tec rims because my cousin can get me a good tire/wheels package deal
 

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If you're going with a 5" lift why don't you put 35"s on it?! I have 33"s on my truck with only a level, and they aren't tall enough for me lol. Im considering a 285/60/20 or a 305/55/20 on my next set.
 
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