Outer Limits 4x4 Board

Im looking at making 33" tyres a permenant part of the hilux in the very near future- I havent decided on tread pattern yet, but it will probably be MTZ's again because i can get the old ones traded in on new ones.

But im not sure what way to go with rims- To safely fit a 12.5" wide tyre, you really need a 8" wide rim minimum, so its new rims time.

Now what im trying to decide on is do i get a set of brand new 15x8" Steel rims, and run 33x12.5x15 tyres, or do I upsize to 16x8" rims and run 285/75R16s'?

Im tempted towards the 16" tyres as ive been told they are a lot more rugged than the 15" tyres- Crock or not?

price wise, the 15" rims are about $60 each, the 16" are about $110 each.

What direction do i go?

Look at the load ratings of both sizes. The 16" tyres are rated to carry significantly more weight, which means that under any given set of load/speed/road conditions the 16" tyres will be further inside their limits.

To me, this means they're less likely to fail.

yeah- just in the MTZ's alone, a 33x12.5x15 is a 106 load rating, but a 285/75R16 is a 122.

Also, the 285/75's are actually a 33.1x11.5x16, which i think i would prefer over the wider 33x12.5.

Guess i'll go for a wander at some point and find out how much the local mickey thompson dealer will give me for my 5000km old MTZ's in an upgrade to 285/75R16 MTZ's

Or i'll go find out what my mates rates for MTR's is- I got quoted $305 ea for 33x12.5x15 MTRs the other day

ferrit wrote:yeah- just in the MTZ's alone, a 33x12.5x15 is a 106 load rating, but a 285/75R16 is a 122.

I just looked up a table to see how much difference that really is - 950kg vs 1500kg.

http://www.michelin.com.au/tyres/tyreBa ... Rating.asp per tyre.

I'll take the 16s, thanks... Oops. Already did.

-Scott- wrote:

ferrit wrote:yeah- just in the MTZ's alone, a 33x12.5x15 is a 106 load rating, but a 285/75R16 is a 122.

I just looked up a table to see how much difference that really is - 950kg vs 1500kg.

http://www.michelin.com.au/tyres/tyreBa ... Rating.asp per tyre.

I'll take the 16s, thanks... Oops. Already did.

Why do would you need 16s? Your SWB Pajero doesn't weigh close to 6000kg! The 15 inch tyres give you 2000kg, that what my SWB GQ weighs.

also look at the price difference in rim sizes from 15 to 16in..
Some tires it can be $50per tire different.
Also rim prices.
you can get 15x8's for $50-60... 16x8's are over $100.

-Scott- wrote:

ferrit wrote:yeah- just in the MTZ's alone, a 33x12.5x15 is a 106 load rating, but a 285/75R16 is a 122.

I just looked up a table to see how much difference that really is - 950kg vs 1500kg.

http://www.michelin.com.au/tyres/tyreBa ... Rating.asp per tyre.

I'll take the 16s, thanks... Oops. Already did.

As did i, despite them being a bit more expensive.

Team overkill.

mind you now that my GQ isnt a daily driver I would have probably gone for the 15's. Oh well. No real big loss!

Another thing I considered was the 16" provides better onroad handling thanks to the lower sidewall (i went 285/75r16 on a GQ). Well, should do in theory.

ferrit wrote:Im looking at making 33" tyres a permenant part of the hilux in the very near future- I havent decided on tread pattern yet, but it will probably be MTZ's again because i can get the old ones traded in on new ones.

But im not sure what way to go with rims- To safely fit a 12.5" wide tyre, you really need a 8" wide rim minimum, so its new rims time.

Now what im trying to decide on is do i get a set of brand new 15x8" Steel rims, and run 33x12.5x15 tyres, or do I upsize to 16x8" rims and run 285/75R16s'?

Im tempted towards the 16" tyres as ive been told they are a lot more rugged than the 15" tyres- Crock or not?

price wise, the 15" rims are about $60 each, the 16" are about $110 each.

What direction do i go?

You can sell them to me at a highly discounted rate as I'm looking for a set of 31's muds?

SIM79 wrote:Why do would you need 16s? Your SWB Pajero doesn't weigh close to 6000kg! The 15 inch tyres give you 2000kg, that what my SWB GQ weighs.

-Scott- wrote:Look at the load ratings of both sizes. The 16" tyres are rated to carry significantly more weight, which means that under any given set of load/speed/road conditions the 16" tyres will be further inside their limits.

To me, this means they're less likely to fail.

The 15" wheels are not only cheaper but the rubber to go on them are much cheaper. I've used 33" 15's on my maverick for years and it is a very heavy beast without any blow outs or punctures whatsoever.

atari4x4 wrote:

ferrit wrote:Im looking at making 33" tyres a permenant part of the hilux in the very near future- I havent decided on tread pattern yet, but it will probably be MTZ's again because i can get the old ones traded in on new ones.

But im not sure what way to go with rims- To safely fit a 12.5" wide tyre, you really need a 8" wide rim minimum, so its new rims time.

Now what im trying to decide on is do i get a set of brand new 15x8" Steel rims, and run 33x12.5x15 tyres, or do I upsize to 16x8" rims and run 285/75R16s'?

Im tempted towards the 16" tyres as ive been told they are a lot more rugged than the 15" tyres- Crock or not?

price wise, the 15" rims are about $60 each, the 16" are about $110 each.

What direction do i go?

You can sell them to me at a highly discounted rate as I'm looking for a set of 31's muds?

Could be tempted... I keep the rims tho!

i'll find out some prices tomorrow

IMO go the 16s you will also find that in the 16" size the tyres generally have more ply in the sidewall also. As well as the fact you dont end up with as much sidewall on the road so the bigger rims drive better on road imo.

i have been wondering about this as well for when i need new rims and tyres which will probably be early next year.

anybody have any idea on the weight difference between 2 tyre/rim combos of the same width/diameter/make etc, one on a 15' rim and one on a 16' rim? just curious.

bit hard to guess really- The 285/75R16 is a thinner tyre than a 33x12.5x15 (11.5vs12.5) but its a heavier construction.

A 16" rims also going to have more steel in it and therefore weigh more.

Weight difference between the 15" and 16" rims were stuff all when I picked them up!

Fatter tyres aren't always better than a skinny. Depends on where you drive i guess.

Turns out theres less than $20 a tyre difference in MTZ's between a 33x12.5x15 and a 285/75R16.

ferrit wrote:bit hard to guess really- The 285/75R16 is a thinner tyre than a 33x12.5x15 (11.5vs12.5) but its a heavier construction.

A 16" rims also going to have more steel in it and therefore weigh more.

Why don't you take a look at a 305/70/16? Same rolling diameter as the 285/75 but slightly wider and a lower profile again which means increased on road handling.

T_Diesel wrote:
Why don't you take a look at a 305/70/16? Same rolling diameter as the 285/75 but slightly wider and a lower profile again which means increased on road handling.

I'm confused.

Yom wrote:

T_Diesel wrote:
Why don't you take a look at a 305/70/16? Same rolling diameter as the 285/75 but slightly wider and a lower profile again which means increased on road handling.

I'm confused.

My bad, I mean't compared to the 33/12.5/15 in terms of profile and on road handling. That's what happens when you post whilst watching footy and drinking wine.