Jump to content
SAU Community

Gtr Tyre & Wheels Size Problem

PAV34
 Share

Recommended Posts

PAV34 Mentor

PAV34

Posted
Posted

So i have BBS LM's on my 32 GTR right....

But the rears are 9" wide with 255/40/17 tyres

And the fronts have 8" wide with 235/45/17 tyres

As you know this isnt good for the 4wd system

What if i put 245/45/17 all round, would that be ok? I really like these wheels and dont want to sell them, but if this doesnt work i will.

Link to comment
https://www.sau.com.au/forums/topic/220004-gtr-tyre-wheels-size-problem/
Share on other sites
Sydneykid Grand Master

Sydneykid

Posted
Posted
So i have BBS LM's on my 32 GTR right....

But the rears are 9" wide with 255/40/17 tyres

And the fronts have 8" wide with 235/45/17 tyres

As you know this isnt good for the 4wd system

What if i put 245/45/17 all round, would that be ok? I really like these wheels and dont want to sell them, but if this doesnt work i will.

No problem from an ATTESA perspective.

Cheers

Gary

Sydneykid Grand Master

Sydneykid

Posted
Posted
255/40's and 235/45's will be better for the ATTESA system than 245/45 and 235/45.

But smaller tyres on the front just makes them understeer even worse. A 10% narrower tyre on the end of the car that weighs 50% more can't possibly be a good idea.

Cheers

Gary

PAV34 Mentor

PAV34

Posted
  • Author
Posted
But smaller tyres on the front just makes them understeer even worse. A 10% narrower tyre on the end of the car that weighs 50% more can't possibly be a good idea.

Cheers

Gary

Yeah thats what i have, i think its about a 2% difference in rolling diameter, yet the Front Torque Gauge still goes up to about 10 when doing around 100kms on the freeway - will that still cause problems?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      New fix for low tyre pressure from bmw

      By MBS206 · Posted

      Yep, pretty much what you said is a good summary. The aftermarket thing just attached to the rim, then has two lines out to valve stems, one to inner wheel, one to outer wheel. Some of the systems even start to air up as you head towards highway speed. IE, you're in the logging tracks, then as speeds increase it knows you're on tarmac and airs up so the driver doesn't even have to remember. I bet the ones that need driver intervention to air up end up seeing a lot more tyre wear from "forest pressures" in use on the highway!
    • sunsetR33
      Anyone know this frontpipe?

      By sunsetR33 · Posted

      Yes, but you need to do these type certifications for tuning parts. That is the absurd part here. Meaning tuning parts are very costly (generally speaking) as well as the technical test documentation for say a turbo swap with more power. It just makes modifying everything crazy expensive and complicated. That bracket has been lost in translation many years ago I assume, it was not there.
    • dbm7
      New fix for low tyre pressure from bmw

      By dbm7 · Posted

      Hahaha, yeah.... not what you'd call a tamper-proof design.... but yes, with the truck setup, the lines are always connected, but typically they sit just inside the plane of the rear metal mudguards, so if you clear the guards you clear the lines as well. Not rogue 4WD tracks with tree branches and bushes everywhere, ready to hook-up an air hose. You can do it externally like a mod, but dedicated setups air-pressurize the undriven hubs, and on driven axles you can do the same thing, or pressurize the axles (lots of designs out there for this idea)... https://www.trtaustralia.com.au/traction-air-cti-system/  for example.... ..the trouble I've got here... wrt the bimmer ad... is the last bit...they don't want to show it spinning, do they.... give all the illusion that things are moving...but no...and what the hell tyre profile is that?...25??? ...far kernel, rims would be dead inside 10klms on most roads around here.... 😃
    • joshuaho96
      Anyone know this frontpipe?

      By joshuaho96 · Posted

      You're just describing how type certification works. Personally I would be shocked to discover that catalytic converter is not in the stock mounting position. Is there a bracket on the transfer case holding the catalytic converter and front pipe together? If so, it should be in stock position. 
    • GTSBoy
      New fix for low tyre pressure from bmw

      By GTSBoy · Posted

      You talking about the ones in the photo above? I guess that could make sense. Fixed (but flexible) line from the point up above down to the hubcap thingo, with a rotating air seal thingo. Then fixed (but also still likely flexible) line from the "other side" of the transfer in the hub cap thingo up to the valve stem on the rim. A horrible cludge, but something that could be done. I'd bet on the Unimog version being fed through from the back, as part of the axle assembly, without the need for the vulnerable lines out to the sides. It's amazing what you can do when you have an idea that is not quite impossible. Nearly impossible, but not quite.
×
×
  • Create New...