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33" tyres in a 16" rim, what size?
Posted: Fri Dec 21, 2007 1:46 pm
by sidewayz
hey
just wondering what the equivilant tyre is in a 16" for a 33x12.5x15"
is it 305 70 r16?
thanx in advance
matty
Posted: Fri Dec 21, 2007 1:58 pm
by RoldIT
Yes, and a 285/75R16.
Posted: Fri Dec 21, 2007 2:51 pm
by Slunnie
The 285/75-16 is a 33x11.5-16 though.
Posted: Fri Dec 21, 2007 2:57 pm
by sierrajim
Posted: Fri Dec 21, 2007 5:16 pm
by 4runner2.8
285's are more a 33.5 there taller then a 305
Posted: Fri Dec 21, 2007 6:16 pm
by rezpkt
305x70x16 is indeed a 33 x 12.5
A 285 is NOT a 33.5, they are merely 32.8
A 290x75 is more like a 33.2 (jungle trekker)
Posted: Fri Dec 21, 2007 7:34 pm
by sidewayz
so in QLD a 305x70x16 would be perfectly legal for road use?
Posted: Fri Dec 21, 2007 11:16 pm
by RN
I am running 275 x 75?? x 16...so would that be classified as 31's???
Posted: Fri Dec 21, 2007 11:17 pm
by -Scott-
RoadNazi wrote:I am running 275 x 75?? x 16...so would that be classified as 31's???
Over 32" I do believe - which I reckon is illegal!
Where's a cop when you need one.
Posted: Sat Dec 22, 2007 1:15 am
by RN
-Scott- wrote:RoadNazi wrote:I am running 275 x 75?? x 16...so would that be classified as 31's???
Over 32" I do believe - which I reckon is illegal!
Where's a cop when you need one.
Illegal..hardly ???? They were standard factory issue on a L/Cruiser.
Home on the puter.....
Posted: Sat Dec 22, 2007 8:02 am
by Rogue Patrol
The formula is.......
width x aspect ratio x2 / 25.4 + rim diameter
275 x .75 = 206.25
x2 = 412.5
/ 25.4 = 16.240157
+ 16 = 32.240157
Posted: Sat Dec 22, 2007 8:33 am
by seaeagle
how much does rim width play a part in choosing tyres
Posted: Sat Dec 22, 2007 9:19 am
by -Scott-
RoadNazi wrote:-Scott- wrote:RoadNazi wrote:I am running 275 x 75?? x 16...so would that be classified as 31's???
Over 32" I do believe - which I reckon is illegal!
Where's a cop when you need one.
Illegal..hardly ???? They were standard factory issue on a L/Cruiser.
Home on the puter.....
If they were standard issue LC I expect they would be 275/70R16 - a little over 31".
seaeagle wrote:how much does rim width play a part in choosing tyres
Each tyre size has a defined range of suitable rim widths. A tyre fitted to a rim outside that range is considered unroadworthy.
Posted: Tue Dec 25, 2007 10:14 am
by DavidM
305/70 and 285/75 have the same diameter, unless you get really picky and go to the 100th degree and then the 285 is .02 inches bigger. In Qld the law states that you can't fit a tyre that is 15mm greater diameter than the largest factory optioned tyre. So yes a 33 inch tyre is illegal as its more than 50mm over the patrols largest tyre. Yet I have never heard of a cruiser or patrol being pinned for 33's during a RWC. Check out the Qld Transport site for Vehicle Modifications and it spells it out for you.
Personally I wouldn't worry too much about it, or you would see every 2nd Cruiser/Patrol off the road with a defect notice from the Qld Transport. By the way your Sidewayz, your Patrol and my Cruiser are almost identical. Factory rust and custom panels
Posted: Tue Dec 25, 2007 2:36 pm
by Rogue Patrol
DavidM wrote: So yes a 33 inch tyre is illegal as its more than 50mm over the patrols largest tyre.
it's 25mm larger but yes, still technically illegal. Largest original fitment is 32".
Posted: Fri Dec 28, 2007 8:50 am
by sidewayz
ok sweet. 305 70 it is
thanx for the info
and david m, hopefully once its back on the road it wont hav so much rust and mayb even some straight panels. for now...
Posted: Fri Dec 28, 2007 6:42 pm
by DavidM
You're a better man than me. I just live with it. Might explain why my 80 looks like sh*t most of the time. But have owned it for 12 years and know the exact location of every love tap. Getting a teary eye. I think
I will go for a play
Posted: Sat Dec 29, 2007 12:29 am
by midi73
Planning on doing her up now are we Matt?