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Rota's On R34 25gt

Giaccovitch

By Giaccovitch,
in Exterior & Interior Styling

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Giaccovitch Enthusiast

Giaccovitch

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Hi guys, I'm looking at buying 18" Rota Grid R's as there's too much wheel gap with the current 17" Work Emotion Cr Kai's. I can't lower my car anymore because the exhaust is already 100mm off the ground and sometimes scrapes. Will 18" wheels fill in the gap or will I need to get 19's? Also I'm not 100% on the width and offset of the wheel. I've seen Magicks setup and I really like it, http://www.sau.com.au/forums/topic/404792-magicks-na-r34/ he has 18 x 9.5 +20 all round. I can get my hands on 18 x 9.5 +18 but I don't want the wheels to stick out much at all. Also would it look better if I had different offsets for the fronts and rears and different tyre width? I've attached photo's of my current setup.
Any suggestions would be appreciated, thanks.

post-142082-0-49561200-1454167397_thumb.jpg

post-142082-0-08713900-1454167405_thumb.jpg

post-142082-0-46007600-1454167413_thumb.jpg

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https://www.sau.com.au/forums/topic/462605-rotas-on-r34-25gt/
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V28VX37 Veteran

V28VX37

Posted
Posted

Nope a larger wheel size won't fix the 'wheel gap'. As you know with larger wheels the tyre profile comes down so that the overall tyre diameter is maintained roughly the same.

The wheel gap is a function of your ride height, suspension settings and wheel offset. For instance if you pushed out your existing wheels (or got a new set with a different offset) by say 10mm it'd make the gap look smaller from the front/rear quarter angle.

To get to the kind of fitment Magick is running (which looks great btw) you will have to drop the car more. You'll most likely need to modify the exhaust to tuck it in better to avoid scraping. Also when you drop the car more you're introducing more neg. camber all around and will probably start needing adjustable camber arms to correct. Then depending on how low you go you'll need rear traction rods to correct bump steer.

Anyway chasing good fitment is great fun. And expensive. Good luck.

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Giaccovitch Enthusiast

Giaccovitch

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  • Author
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Nope a larger wheel size won't fix the 'wheel gap'. As you know with larger wheels the tyre profile comes down so that the overall tyre diameter is maintained roughly the same.

The wheel gap is a function of your ride height, suspension settings and wheel offset. For instance if you pushed out your existing wheels (or got a new set with a different offset) by say 10mm it'd make the gap look smaller from the front/rear quarter angle.

To get to the kind of fitment Magick is running (which looks great btw) you will have to drop the car more. You'll most likely need to modify the exhaust to tuck it in better to avoid scraping. Also when you drop the car more you're introducing more neg. camber all around and will probably start needing adjustable camber arms to correct. Then depending on how low you go you'll need rear traction rods to correct bump steer.

Anyway chasing good fitment is great fun. And expensive. Good luck.

The exhaust is almost touching the body under the car, so It can't be changed at all. I;ll calculate the offset of my current wheels and will see what offset I should get on the new set. Maybe +30? Also wouldn't I be able to have a higher tyre profile?

Giaccovitch Enthusiast

Giaccovitch

Posted
  • Author
Posted

Nope a larger wheel size won't fix the 'wheel gap'. As you know with larger wheels the tyre profile comes down so that the overall tyre diameter is maintained roughly the same.

The wheel gap is a function of your ride height, suspension settings and wheel offset. For instance if you pushed out your existing wheels (or got a new set with a different offset) by say 10mm it'd make the gap look smaller from the front/rear quarter angle.

To get to the kind of fitment Magick is running (which looks great btw) you will have to drop the car more. You'll most likely need to modify the exhaust to tuck it in better to avoid scraping. Also when you drop the car more you're introducing more neg. camber all around and will probably start needing adjustable camber arms to correct. Then depending on how low you go you'll need rear traction rods to correct bump steer.

Anyway chasing good fitment is great fun. And expensive. Good luck.

Maybe if I get 20mm spacers it will look better, you suggested this to me on another post I made

V28VX37 Veteran

V28VX37

Posted
Posted

The exhaust is almost touching the body under the car, so It can't be changed at all. I;ll calculate the offset of my current wheels and will see what offset I should get on the new set. Maybe +30? Also wouldn't I be able to have a higher tyre profile?

There's ways around the exhaust, for instance you could replace mid muffler with a resonator, or try a completely different system. I'm not familiar with the GT exhaust system in terms of where there cat and muffler sit but I wouldn't expect it to be massively different to the GTT's.

What tyres are you running? Stock tyre on the GTT is 225/45R17. If you go wider and/or higher profile you'll start getting an error in the speedo and odometer readings because you're increasing the outer diameter of the tyre.

Maybe if I get 20mm spacers it will look better, you suggested this to me on another post I made

To work out the spacer size - with your current suspension setup - put the car on a flat surface and hold a spirit level across the wheel surface so that it's fully upright when looking from the side of the car. Tuck the end under the guard and measure against it how far back the tyre is sitting from the guard. That's how far off a 'flush' fitment you currently are.

Based on your photos here my guess is about 10mm off at the front and 20-25mm in the rear: http://www.sau.com.au/forums/topic/462520-spacers-on-34/

Giaccovitch Enthusiast

Giaccovitch

Posted
  • Author
Posted

There's ways around the exhaust, for instance you could replace mid muffler with a resonator, or try a completely different system. I'm not familiar with the GT exhaust system in terms of where there cat and muffler sit but I wouldn't expect it to be massively different to the GTT's.

What tyres are you running? Stock tyre on the GTT is 225/45R17. If you go wider and/or higher profile you'll start getting an error in the speedo and odometer readings because you're increasing the outer diameter of the tyre.

To work out the spacer size - with your current suspension setup - put the car on a flat surface and hold a spirit level across the wheel surface so that it's fully upright when looking from the side of the car. Tuck the end under the guard and measure against it how far back the tyre is sitting from the guard. That's how far off a 'flush' fitment you currently are.

Based on your photos here my guess is about 10mm off at the front and 20-25mm in the rear: http://www.sau.com.au/forums/topic/462520-spacers-on-34/

Thanks for the help mate, I might try and lower the car a bit more and see if it will scrape, it doesn't scrape atm but it is fairly low

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