Rolltide10
New member
what's the biggest tire i can run on 20" rims with no lift or spacers.
Tire size help!
- Thread starter Rolltide10
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CJ3Flyr
Super Moderator
www.rims-n-tires.com/rt_specs.jsp This site will probably lead you to a 285/??/20 that will be about 32" tall.
:cheers:
:cheers:
Rolltide10
New member
do you think a 285/50/20 Terra Grappler would fit without rubbing? And i'm new at all this so can comeone tell me what the numbers mean. I know the last number is rim size but what do the other two mean?
CJ3Flyr
Super Moderator
Rolltide10 said:
Get a calculator out and...
285mm wide/50%aspect ratio/20inch rim size.
50% of 285 =142.5mm... The width of the tire is approx 285mm. The sidewall height is about 50% of the width at 142.5mm.
To get overall height take 142.5 x 2 (top and bottom of tire on a rim)= 285mm. 285/25.4 puts it into inches and that # is 11.22". Now add the rim diameter and you get 31.22" as an overall tire diameter. So depending on backspace/offset I'd say that tire would fit. In general up to 32" seems to fit a 4th gen T4R with no issues.
Now each tire manufacturer measures a little differently, the tire 'settles' with the weight of the vehicle etc but that method is how it's done and it get's you pretty close. Tirerack.com has a FAQ section that will explain all that better than I can...
:cheers:
Rolltide10
New member
Wow i never realized how complicated tires were haha
