3 replies to this topic

[yamahammer342]

Sorry because I know these are repetitive, but I couldn't find any threads with this exact setup.  Looking at the purchasing the following:

 

Rohana RFX11

 

Front: 20x10 +20

Rear: 20x11 +20

 

Stock suspension.

I'm hoping to be able to swap over my current almost new MP4S (255/40) (285/35)

 

Will this work out ok?  Should I get a spacer for the rear?  I would prefer the wheels stick out as much as possible without rubbing.  

 

Also I would like the option of running 888r in the future.  

 

 

Thanks.

Edited by yamahammer342, 13 January 2021 - 09:29 PM.

[AutoXGTR]

Using OEM suspension and compared to OEM wheels-

 

Front wheel will poke out 31mm more, tire will stick out 25mm more than OEM tire. Usually to get a flush fitment, a 15mm front spacer can be used so with this rim you will likely be about 16mm more poke on the wheel than flush.

 

Rear wheel will poke out 11mm more, tire will stick out 5mm more than OEM tire. Usually to get a flush fitment, a 20mm front spacer can be used so with this rim you will likely be about 9mm less poke than flush. This can be fine or you can use a 10mm wheel spacer.

 

In your case the wheels are not likely to rub because the suspension is OEM and the tires are OEM, but they may poke out some.

 

Toyo R888R tires in the future should not be a problem unless you choose sizes that are taller than OEM tire diameter.

Front 285/35-20

Rear 325/30-20

 

305/35-20 square (on both front and rear wheels) has a tall tire diameter of 28.4" - slight risk of rubbing under load.

[yamahammer342]

Using OEM suspension and compared to OEM wheels-

 

Front wheel will poke out 31mm more, tire will stick out 25mm more than OEM tire. Usually to get a flush fitment, a 15mm front spacer can be used so with this rim you will likely be about 16mm more poke on the wheel than flush.

 

Rear wheel will poke out 11mm more, tire will stick out 5mm more than OEM tire. Usually to get a flush fitment, a 20mm front spacer can be used so with this rim you will likely be about 9mm less poke than flush. This can be fine or you can use a 10mm wheel spacer.

 

In your case the wheels are not likely to rub because the suspension is OEM and the tires are OEM, but they may poke out some.

 

Toyo R888R tires in the future should not be a problem unless you choose sizes that are taller than OEM tire diameter.

Front 285/35-20

Rear 325/30-20

 

305/35-20 square (on both front and rear wheels) has a tall tire diameter of 28.4" - slight risk of rubbing under load.

 

I've seen your replies in this forum before and you are the man. I was a little worried about the front, thank you!

[AutoXGTR]

For your case, key is tire diameter of the front tire. As long as it is OEM 28" or less then you are fine with rubbing. Wheel offset determines how much poke you get. Aggressive offset is fine and should be OK with handling and performance for normal use and limited track.

 

Best situation is to buy wheels with the offset that doesn't require wheel spacers. If in doubt you can mount the wheels and look at the poke before deciding if you want to add the wheel spacer. If the wheel spacer is thick then you might need to add wheel studs that are longer than OEM. A thin hubcentric wheel spacer like 5mm is fine with OEM studs. If you use multiple wheels with different offsets and don't always need wheel spacers for fitment then open ended nuts will work with any combination of wheel offsets and longer studs. Close end nuts require a tight lock on the wheel so fitment is critical.