Tires & stuff

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Tires & stuff

Postby Apexcone » Tue Jul 28, 2015 1:21 pm

Have you guys ever fitted the 235 x 45 17 on the NC. Does it rub anywhere, and how dos it change the ride hight
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Re: Tires & stuff

Postby Brian » Tue Jul 28, 2015 6:16 pm

Too TALL, does rub when you hit big enough bump.

Correct size 235/40/17
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Re: Tires & stuff

Postby Apexcone » Wed Jul 29, 2015 6:50 am

Problem is you cant buy the 235x40 17, in the RE71 R :cry:
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Re: Tires & stuff

Postby Apexcone » Wed Jul 29, 2015 7:11 am

Does a 215 x 45 17 work, I see on the comparison charts its slightly taller, which would make it slightly taller geared.
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Re: Tires & stuff

Postby Castro » Wed Jul 29, 2015 7:17 am

Apexcone wrote:Does a 215 x 45 17 work, I see on the comparison charts its slightly taller, which would make it slightly taller geared.


Yes. 215 works really well with the stock wheels specially if you a have the 6 speed manual. Your speedo will be off a bit about 2% but you'll cruise at lower RPMs in the highway and gain a couple extra MPH in second if doing autocross.
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Re: Tires & stuff

Postby Apexcone » Wed Jul 29, 2015 7:22 am

Castro wrote:
Apexcone wrote:Does a 215 x 45 17 work, I see on the comparison charts its slightly taller, which would make it slightly taller geared.


Yes. 215 works really well with the stock wheels specially if you a have the 6 speed manual. Your speedo will be off a bit about 2% but you'll cruise at lower RPMs in the highway and gain a couple extra MPH in second if doing autocross.


What's remarkable is the the 215 x 45 is taller than the 235 x 40, before I order these tyres I need to be 100% sure that the 215 doesn't rub.
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Re: Tires & stuff

Postby Castro » Wed Jul 29, 2015 8:20 am

Is not the sidewall height that will rub is the tire width. Unless you go to a crazy tall profile tire. Stock wheels and suspension you could even fit a 225/45 with no rubbing. This are 215 pilot super sports on 7.5 width rims.
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Re: Tires & stuff

Postby Brian » Wed Jul 29, 2015 9:26 am

My wife has 215/45/17 on her car, works great.
Many do run 225/45/17, that is about as tall as you want to go.
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Re: Tires & stuff

Postby dmicah » Thu Jul 30, 2015 11:26 am

I suspect the writer is talking about mounting these tires on the stock Mazda rims, based on the other thread. Those are 7 or 7.5 width, aren't they? Will these tires work on them?
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Re: Tires & stuff

Postby Brian » Thu Jul 30, 2015 11:31 am

The wider the tire on that stock 7 inch rim, the sloppier it gets. Stock class guys do it all the time and what they do to compensate as best they can is run higher tire pressure to try to get the most from the tire when not ideally supported.
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Re: Tires & stuff

Postby Apexcone » Thu Jul 30, 2015 4:17 pm

In your experience Brian what size would you run on the stock rim, I would agree that the 235 would be oversized for the rim, you'd end up having to over inflate the tire and it would be running on the centre of the tread.
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Re: Tires & stuff

Postby Brian » Thu Jul 30, 2015 5:43 pm

Got a 5speed or 6speed?

Local courses fast or slow? And by that I mean, are you running out of 2nd gear and forced to shift often?
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Re: Tires & stuff

Postby Apexcone » Thu Jul 30, 2015 8:54 pm

Very occasional run out of 2nd gear
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Re: Tires & stuff

Postby Brian » Fri Jul 31, 2015 3:29 pm

Well, 225/45 would mean you go a bit faster before you run out of 2nd gear...which would be handy for days you otherwise run out of 2nd gear. It will feel sloppy, yet prove fast if you run the higher pressures to make it work (depending on tire and surface conditions that might be 40psi). That 225/45 is a choice lots of 6speed guys do in particular since running out of 2nd gear is a common issue for them.
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Re: Tires & stuff

Postby Miata boy » Sun Aug 16, 2015 8:27 pm

image.jpg
Brian wrote:Too TALL, does rub when you hit big enough bump.

Correct size 235/40/17

Here is my 2012 S.E. Enkei PF01 17 x 8 with Yokohama ADVAN AD08R 235/40 17. Car lowered with Bilstein PPS10 coilovers. No contact or rubbing on fender. A perfect fit . Received the Wilwood big brake kit from Brian last week. Waiting for his new Wilwood rear brake kit with separate parking brake calipers.
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