Mud-club

Vehicle & Technical => Not Anything Listed Above.... => Topic started by: TRACMAN on July 03, 2007, 22:33:25

Title: tyre sizes
Post by: TRACMAN on July 03, 2007, 22:33:25

can any one explain the tyre sizes that 31/10.5 15 corresponds with
some thing like 265/50/15?
cheers
chris

Title: tyre sizes
Post by: fudge on July 03, 2007, 22:39:55

I've got 31.10.5x15's and theres no way they are a 50 profile equivilent, more like 70 or 80!

(http://i124.photobucket.com/albums/p35/MarkBloomfield/DSCF0006-1.jpg)
(http://i124.photobucket.com/albums/p35/MarkBloomfield/DSCF0008-1.jpg)

Title: tyres sizes
Post by: TRACMAN on July 03, 2007, 22:45:59

thanks fudge for the reply,is there any cross reference to sizes?
cheers  
chris

Title: tyre sizes
Post by: SWEETY on July 05, 2007, 22:01:53

This may help 265/50R15 means 265=width of the tyre, 50=height of sidewall & R15=size of the wheel. 31/10.5 15 means 31=31" across the hole wheel & tyre, 10.5=the width of the tyre & R15 is the wheel size all the sizes are in inches not mm :D

Title: tyre sizes
Post by: Mudlark on July 05, 2007, 22:16:19

31 -10.5 - 15 = 265/75 approx

31 - 10.5 - 16 = 265/65 approx


These are only approx - to the nearest metric size

Title: tyre sizes
Post by: clbarclay on July 06, 2007, 12:22:29

Quote from: "SWEETY"

This may help 265/50R15 means 265=width of the tyre, 50=height of sidewall & R15=size of the wheel. 31/10.5 15 means 31=31" across the hole wheel & tyre, 10.5=the width of the tyre & R15 is the wheel size all the sizes are in inches not mm :D

Slight ammendments...

The 50 in 265/50r15 is the % height of the sidewall. The sidewall in the above example is 50% of the tyres width (265*50%=132.5mm height side walls)

The R designates that the tyre is radial ply construction, as apposed to bias ply or cross ply.