NZ 300ZX Owners Club Forum

ZFetsh · Forum Admin Joined: 12 Jun 2003 Posts: 2531 Location: Aux

UTQG 140 AA A

195/55R15, 195/50R15, 205/50R15
205/55R16, 205/50R16, 225/50R16, 225/45ZR16
215/45ZR17, 235/45ZR17, 245/45ZR17, 235/40ZR17, 245/40ZR17, 255/40ZR17, 275/40ZR17, 245/35ZR17
225/40ZR18, 245/40ZR18, 255/35ZR18 265/35ZR18

Has anyone used these yet?
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Asterus · Posted: Fri Nov 07, 2008 12:36 pm Post subject:

Any pricing on those yet?
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Another one bites the dust...

baffa · Posted: Fri Nov 07, 2008 12:59 pm Post subject:

Wow, they have a semislick look going on there

This is the the T1R which I'm running atm to compare:

I'd be keen on prices too, might be worth the upgrade.
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fome dome · Posted: Fri Nov 07, 2008 1:08 pm Post subject:

Have just rang our Toyo suplier & said they are not avalible yet, can get some prices when they arive Cool

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ZFetsh · Forum Admin Joined: 12 Jun 2003 Posts: 2531 Location: Aux

Much appreciated - I may just put them on my next road Z, hopefully going by xmas Cool

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MikeC · Posted: Sat Nov 08, 2008 10:22 am Post subject:

was going to get them, but don't come in the sizes i use, they are available ex-usa if you realllllllllly want them now.

ultrapulse · Posted: Sat Nov 08, 2008 12:20 pm Post subject:

I'm still smoking my last set of t1s's so maybe after that which shouldnt be too far away.
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Hot350zTrack · Posted: Sat Nov 08, 2008 1:13 pm Post subject:

Looks pretty good for summer tyres.... Cool

assuming they'd be priced similar to eagle F1s?

BRONZEE · Posted: Mon Nov 10, 2008 7:15 am Post subject:

Each time I've priced out tyres in the past the Toyo's and F1's are normally a fairly comparative price, F1's usually a tiny bit more.

fome dome · Posted: Mon Nov 10, 2008 12:40 pm Post subject:

Have got some tyre prices with a bit of a club discount. All prices include fitting, balancing & GST

225/50/16 Toyo T1R $186.30
Toyo R888 $253.80
Toyo RA1 $236.25

235/45/17 Toyo T1R $204.53
Toyo R888 $305.10

225/45/18 Toyo T1r $288.90
245/45/18 Toyo T1R $285.53

255/35/18 Toyo R1R $472.50 - These are A road legal semi slick which arnt evan avaliblein NZ yet , If Nation Wide get more intrest in them they will import them & drop the price...
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If there's a bird behind me Murphy its going to bite me on the prickle!

Mad Mike · Posted: Mon Nov 10, 2008 1:34 pm Post subject:

The standard 16" tyre size is 225x50/16 all round, or 245x45/16 on the rear for some.

Using the wrong size, such as 225x45/16 will affect final drive ratios and speedo accuracy etc.

Most of the sizes quoted are incorrect, so probably pay to check before going ahead. A guide I use is to try and get the circumference within 1% of stock. Here is my view of ideal sizes for each rim size:

225x50/16 (standard)
245x45/16 (-0.7%)
245x40/17 (-0.6%)
255x35/18 (+0.7%)

My view is also to try and fit the same size all round for a better balance. The reason a lot of people get smaller front/larger rear is either to reduce cost, or there is more room for bigger tyres at the rear. I have slightly smaller front for space reasons. Next set will be same all round for better turn in and braking than smaller front.

Here are my calculations for variance to the standard 225x50/16:

Width Profile RIM Height Variance Circumference
225 50 16 631.4 1984 (standard)
225 45 16 608.9 -3.6% 1913
245 45 16 626.9 -0.7% 1969
235 45 17 643.3 1.9% 2021
245 40 17 627.8 -0.6% 1972
225 45 18 659.7 4.5% 2073
245 45 18 677.7 7.3% 2129
255 35 18 635.7 0.7% 1997
235 40 18 645.2 2.2% 2027

N.B Variance figure is on circumference and will therefor reflect change to drive ratio and speedo error.

Also please excuse the table - this forum does not format them very well.

Cheers,

Mad Mike.

fome dome · Posted: Mon Nov 10, 2008 2:20 pm Post subject:

Mungyz · Posted: Mon Nov 10, 2008 3:08 pm Post subject:

New tyre = 6mm tread (more or less depending on tyre) worn tyre = 1.5mm tread. This will have an effect on the speedo also, as will tyre pressures (in more extreme cases).

1% is a harsh standard there Mike Shocked

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12.4 @ 118mph (on 18" semi slick circuit tyres)

Mad Mike · Posted: Mon Nov 10, 2008 3:52 pm Post subject:

I agree with your tyre wear explanation and this will account for 1.4% variance in circumference. So any initial tyre size variance will be on top of this. How much is variance is OK? Interesting discussion....

Mungyz · Posted: Mon Nov 10, 2008 4:15 pm Post subject:

I was going to have a read of the rules but ran out of time Rolling Eyes

work to do and all that Laughing

Maybe I will go search for it now.

AA says the tire circumference must remain unchanged Laughing

damn time for me to go buy tires as they have worn a tiny bit and therefore have changed Rolling Eyes

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12.4 @ 118mph (on 18" semi slick circuit tyres)