What size wheels on an NC?

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Discussion

LaurasOtherHalf

Original Poster:

21,429 posts

196 months

Wednesday 25th March 2015
quotequote all
Car is a 2015 (is that a 3.75?), and there seems to be some conflicting advice. Can you fit 8x17"?

I know the car comes on 7x17" but these will be a spare set for track use, car will be lowered as well.

shogun001

253 posts

166 months

Wednesday 25th March 2015
quotequote all
7x8 fits fine as long as you don't have some stupidly low offset wheels. Anything over 40ish should be fine. Also depends on the size tyres you're fitting. Remember that trackday tyres seem to be quite a bit wider. My 215/45/17 federal RSR measure more like 235.

LaurasOtherHalf

Original Poster:

21,429 posts

196 months

Wednesday 25th March 2015
quotequote all
What are you running yourself shogun001?

g40steve

925 posts

162 months

Wednesday 25th March 2015
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I run Speedline 2021, 8J 17

g40steve

925 posts

162 months

Wednesday 25th March 2015
quotequote all
I run Speedline 2021, 8J 17

LaurasOtherHalf

Original Poster:

21,429 posts

196 months

Wednesday 25th March 2015
quotequote all
g40steve said:
I run Speedline 2021, 8J 17
Now they look lovely, in magnesium? What set up are you using?

sbird

325 posts

178 months

Wednesday 25th March 2015
quotequote all
shogun001 said:
7x8 fits fine as long as you don't have some stupidly low offset wheels. Anything over 40ish should be fine. Also depends on the size tyres you're fitting. Remember that trackday tyres seem to be quite a bit wider. My 215/45/17 federal RSR measure more like 235.
Similar width tyres (NS2-R rather than RSR) on 8" caused me problems on the rear arches with lowering springs. The edge of the tyre rubbed. I've yet to see anyone else have an issue though.

OTOH, 16x8 works fine for me.

g40steve

925 posts

162 months

Thursday 26th March 2015
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LaurasOtherHalf said:
Now they look lovely, in magnesium? What set up are you using?
The flowformed ones in gloos black.
Running 2154517 NS2Rs, MeisterR suspension.

mizx

1,570 posts

185 months

Thursday 26th March 2015
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I would go 17x8 215/45, should be ideal if you would rather avoid arch rolls etc, but get a good alignment done. As shogun over ET40 for an 8" should be fine.

With an alignment, on road tyres you can go 30mm further out under the arches without rubbing;

I'm running 235/40 on a 17x9 et 49, lowered about an inch on Tein Street Flex coilovers, front camber is 2.0 and rear 1.5, and it doesn't rub at all. They are a closer rolling radius to 205/45 than 215/45 is, and believe it or not having had them a year, I do not think it is overtyred at all.

Though outside of trackday tyres 235/40 is not an easy size to find which is why I'm not suggesting them, and probably why you don't hear much about larger tyres on MX5s here, compared to reading around on a US site like miata.net where you regularly see 245/40s on track cars (very easy size to find as it happens).

Edited by mizx on Thursday 26th March 20:17

MX-5 Lazza

7,952 posts

219 months

Friday 27th March 2015
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Why are you going for 235 width tyres? 195 width is fine on mine with over 240bhp!

g40steve

925 posts

162 months

Friday 27th March 2015
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It's an American thing rolleyes

mizx

1,570 posts

185 months

Friday 27th March 2015
quotequote all
Partly the wheels I wanted. Because mine is an auto (I expect I'll get it for this too.. makes 235s sound even sillier!), though I know they are popular size, I read into things at the time 215/45 would be to much of an increase in rolling radius making acceleration slower than it already is. So why not keep the standard tyre size? Without going into detail about why etc., I wanted to change the wheels and didn't want 7" width.

I should have explained why in the first place than trying to put it into some sort of context, badly; I admit that website is the only yardstick I based choosing wide tyres on. Unnecessary, yes, they are for the road, but it isn't as if it's unheard of.

All that said I will be changing to 17x8 and 215s once these are worn!

Edited by mizx on Saturday 28th March 16:51

LaurasOtherHalf

Original Poster:

21,429 posts

196 months

Friday 27th March 2015
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I've only had a small nightcap but I'm not convinced I understand any of that. smile

LaurasOtherHalf

Original Poster:

21,429 posts

196 months

Thursday 23rd April 2015
quotequote all
Ok just to throw a curveball into the mix, I can get Nanking Track semi-slick Nankang NS 2R - 205/55 R16 91W (120) TL at stupidly low prices.

Would a 16x7 wheels with 40 offset cause any problems? These will only be used for track days bare in mind.

Car is on a 35mm drop in suspension