tyre sizes
Submitted: Thursday, Jul 07, 2005 at 00:45
ThreadID:
24511
Views:
5397
Replies:
2
FollowUps:
2
This Thread has been Archived
bware
I'm sure this has been explained before, but once more for the dummies! Why are some tyre sizes listed as 31x10.5x15 and others as 235/85R16? I know the last figure is the wheel diameter. I'm presuming that some are inches and some are millimeters but is the 31 the tyre width (same with the 235)?
Secondly, I have just purchased a base model 80 series LC (93 model) with standard rims and wish to upgrade. I would ike to stay with 16 inch rims but wider and get some good rubber. I think I have read somewhere that you can't put wider 16 inch rims on due to interference with brakes or something?
ps thanks for all the advice on Troopy back seats everyone!
Reply By: GQ_WA - Thursday, Jul 07, 2005 at 01:44
Thursday, Jul 07, 2005 at 01:44
31X10.5X16 = 31" Overall diameter, 10.5" Section width and 16" Rim diameter
235/85/16 = 235mm Section width, 85 is the Aspect ratio and 16" Rim diameter.
Aspect ratio is calculated by dividing the section height by the section width and multiplying by 100. (In this example, the sidewall will be 85% of 235)
Converting metric to inches will give you the following:
Section width:
= 235 x 0.0393701
= 9.25"
Overall diameter
= [(0.85 x 235) x 0.0393701] x 2 + 16
= 31.73" Overall diameter
The following website might be able to explain it better:
http://www.1010tires.com/tech.asp?type=tires#sizing
or just use the tyre calculator:
http://www.1010tires.com/TireSizeCalculator.asp
Hope this helps.
Cheers,
Mike
AnswerID:
119216
This place has been deleted