Mud-club

Vehicle & Technical => Defender => Topic started by: Tractorboy16 on February 12, 2007, 17:35:22

Title: 235-75-16 vs 235-85-16?
Post by: Tractorboy16 on February 12, 2007, 17:35:22

hi,

what is the difference in these to tyres?

i know they are pretty similar but are the 75's not as tall as the 85?


cheers

James

Title: 235-75-16 vs 235-85-16?
Post by: AbyssDJ on February 12, 2007, 17:36:48

the 2nd number is the size of the sidewall, in %age of the width.... ie 235/85 = 235mm wide, 85% of 235mm sidewall height.

therefore, the 235/85 is taller - thats the one you want

Title: 235-75-16 vs 235-85-16?
Post by: extreme90 on February 12, 2007, 17:40:07

theres only a smidge in it tho  :?
and if they a remould, theres sometimes no difference  :?
the 265 is wider aswel tho, but you proberly new that  :P
dan

Title: 235-75-16 vs 235-85-16?
Post by: Guardian. on February 12, 2007, 17:43:31

in theory the 85 series is 2 inches overal taller than the 75 series, lifting your axle 1 inch, but different manufacturers vary but it gives you an idea, they wont be far out.

Title: 235-75-16 vs 235-85-16?
Post by: smo on February 12, 2007, 18:29:26

Quote from: "guardian off road product"

in theory the 85 series is 2 inches overal taller than the 75 series, lifting your axle 1 inch, but different manufacturers vary but it gives you an idea, they wont be far out.

The 235/75 has a sidewall of 7.9" the 235/85 has a sidewall of 8.9" so it will only raise the axel height by a comparison of 1/2" overall. The difference is 6.2% which equates to 60/63.7mph.

Title: 235-75-16 vs 235-85-16?
Post by: Guardian. on February 12, 2007, 18:44:45

235 75 176mm wall
235 85 199mm wall
gives 24mm  taller wall depending on tread paterns / tyre types
overall height will be 48mm.
so hows that half inch lifted?

Title: 235-75-16 vs 235-85-16?
Post by: AbyssDJ on February 12, 2007, 18:47:38

i think guardian is right here, smo :) inch taller sidewall will lift the axle and rest of it by an inch.

Title: 235-75-16 vs 235-85-16?
Post by: smo on February 12, 2007, 19:33:39

Yup, he is right, god dam maths letting me down again :p

(In my defence its been a long day....not much of an excuse for being thick tho!)

Title: 235-75-16 vs 235-85-16?
Post by: Guardian. on February 13, 2007, 02:22:02

YOU SHOULD CHEAT AND USE A CALCULATOR, I DID.

Title: 235-75-16 vs 235-85-16?
Post by: Tractorboy16 on February 13, 2007, 12:23:46

Cheers people,

probly could have worked that out my self really now i know what it is being a studend but then we don't like to work to hard!!!

looking at some 35"s now!!!

me xxx

Title: 235-75-16 vs 235-85-16?
Post by: SteveG on February 13, 2007, 13:34:22

If you want to play around with tyre sizes and difference, there's a tyre calculator on the Suffolk LR site..
http://www.slroc.com/tyre.htm

If fitting 35's, make sure you have enough clearance and also make sure your transmission is up to it. If not buy one of these http://x-eng.co.uk/X-Shaft.asp?MID=33 and some spare shafts :wink:  :wink:

Cheers

Steve