whats about this combo? 18 x 10.5 with 285/30/18

[austrian type-R]

What offset is needed for 10.5x18 inch and 285/30/18 Tire in the rear. Does it work with the stock fender or do I have to get a wide body kit? I think a 285 on 9.5inch is just a bit too wide. I dont want any rubbing of course!!!!

I do not like to get an 265 or 275/35 tire, it has too much diameter. 255 is do small for the NSX ass IMO.

thought on 215/40/17 front on 7.5x17 and 285/35/18 on 10.5x18.

either Volk te37 or Volk ce28n is my choice. Enkei RPF1 and Work emotion CR kai is awesome too.


thanks!

 

[nsxtasy]

That's very wide. And I'm not sure why you're even considering it.

I do not like to get an 265 or 275/35 tire, it has too much diameter. 255 is do small for the NSX ass IMO.

I don't know why you say that the 265 or 275 has "too much diameter" - after all, the diameter of the 285/35-18 is even bigger than the 265/35-18 or 275/35-18! - or why you think the 255 is too small. The 265/35-18 is the most popular size rear tire among those who are using 18" rear wheels, and the 255/35-18 is also very popular. But even the 275/35-18 can be used. Any of these three sizes should work fine with the NSX (and, in particular, with the traction control system, TCS). Here is how they compare with the '91-93 stock size of 225/50-16:

255/35-18 +0.7 percent
265/35-18 +1.8 percent
275/35-18 +2.9 percent
285/35-18 +4.0 percent

The 285/30-18 is NOT recommended because it could cause problems with the traction control system, TCS. Remember, by using 215/40-17 front tires (which is the most popular front tire size among those with 17"/18" wheels), you are increasing their outer diameter by 3.0 percent. The 285/30-18 is 0.5 percent smaller than stock, so the ratio between the front and rear changes by 3.5 percent. Add in tire wear, as the rears wear down faster than the front, and you could experience problems with the TCS.

Personally, I would choose the 265/35-18 on an 18x9.5 or 18x10 wheel. Lots of owners have success with it, and you shouldn't need a wide body kit, assuming you choose wheels with the proper offset.

 

[nsx1164]

What offset is needed for 10.5x18 inch and 285/30/18 Tire in the rear.
...

I do not like to get an 265 or 275/35 tire, it has too much diameter. 255 is do small for the NSX ass IMO.

thought on 215/40/17 front on 7.5x17 and 285/35/18 on 10.5x18.

Assuming you haven't bought the wheels yet, then I'd suggest an 18x10 rear (not 10.5" width)... this would allow you to safely use either 265/275/285 width, 35-series tires.

A 10.5" (266 mm) wide wheel would require a minimum tire width of 275.

As Ken mentions, the combo of 215/40-17 F and 265/35-18 R is a pretty popular 17/18 tire fitment, as it offers a decent amount of (street) tire choices, and keeps the F/R outside diameter ratio within OE specs, keeping TCS happy -- I'm assuming you have a 1991-1993 model car.

265R/215F is also closer to the OE F/R width stagger... going with a much wider REAR (275/285/etc) with a 215 FRONT will increase your chances of understeer, particularly in the wet.

 

[austrian type-R]

215/40/17 = 604mm diameter
oem 205/50/15 = 586mm diameter

maybe front 225/35/17 is better for the TC with 285/30 in the rear? cause 225/35/17 has only 590mm diameter.

285/30/18 would be the diameter which is near stock: 628mm (631 is stock on 92 modell, 628 is stock on newer modells with 245/40/17)

back to my question: a 10.5inch rim is too wide for the stock rear fenders w/o rubbing?

Is the TC different on NSX which have 16inchers in front from factory? A 215/45/16 has 600 mm diameter, while the rear 245/40/17 has 628mm. There is a diff of only 28mm on newer modells, while the old ones have a diff of
45 mm. The combo 215/40/17 andn 285/30/18 has a diameter difference of 24mm.


btw: I normaly drive without TCS

PS: A 215/35/17 has 582,5mm diameter. Only possible high performance tire which I have in mind would be Conti sport contact in this dimenssion. when using 215/40 and any of the recommended rear tire choice I would use Potenza S03 PP.

SO I get it right?
205/40/17, 215/35/17 or 225/35/17 when using 285/30/18?

215/40/17 when having 255 or 265/35/18 in the rear. downside is, that acceleration is a bit slower with bigger diameter wheels.

 

[nsxtasy]

Is the TC different on NSX which have 16inchers in front from factory?

Yes. The TCS is designed for the stock size for that particular year. Based on the photos you posted of the car you were buying, I assumed it was a '91-93, with 15" front wheels.

Most 225 series front tires rub on the fender well liners at least occasionally, which is why most owners with 17" front wheels are using 215/40-17 front tires.

Only possible high performance tire which I have in mind would be Conti sport contact in this dimenssion. when using 215/40 and any of the recommended rear tire choice I would use Potenza S03 PP.

Using different brand/model front tires from rear tires is a BAD IDEA because it makes the handling unpredictable, and is NOT RECOMMENDED. Don't do it.

Many of the best tires come in 215/40-17 and 265/35-18. Those sizes will be just fine for all years of NSX. The difference in acceleration isn't significant, but if that is a concern, then get the 255/35-18 instead, which also works fine.

 

[digimanoc]

I have Techno's with 225-35-17 fronts and 285-30-18 rears..no rubbing at all.

 

[nsx1164]

back to my question: a 10.5inch rim is too wide for the stock rear fenders w/o rubbing?

Stock ride height -- should be OK. Lowered car -- it depends (offset, tire width, and amount of lowering). A 275/285 width REAR tire should not rub using "normal" offsets, with a moderately-lowered car.

Performance impact not so much due to increased wheel diameter, but wheel WEIGHT. Tire outer diameter (sum of innder diameter + sidewall thickness) might impact effective gearing, resulting in both acceleration loss/gain and speedometer/odometer miscalibration.

 

[digimanoc]

Stock ride height -- should be OK. Lowered car -- it depends (offset, tire width, and amount of lowering). A 275/285 width REAR tire should not rub using "normal" offsets, with a moderately-lowered car.

Performance impact not so much due to increased wheel diameter, but wheel WEIGHT. Tire outer diameter (sum of innder diameter + sidewall thickness) might impact effective gearing, resulting in both acceleration loss/gain and speedometer/odometer miscalibration.

True...I have Zanardi suspension that only lowered it about a 1/4".

 

[austrian type-R]

how much wil an NSX-R suspension lower the car?

 

[CrazyNSX]

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