Tyre Choice Confusion 205/50R15 & 245/45/R16

Tyre Choice Confusion 205/50R15 & 245/45/R16

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Discussion

Griffit

Original Poster:

370 posts

214 months

Friday 15th May 2020
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With lockdown eased I've taxed my Griff ready to enjoy it but am in need of new tyres almost immediately as I have about 2mm on the rears. My 500 (non-PAS) has always run 205/50R15 and 245/45R16 and I'm struggling to determine what to fit now?

For the past 12 years I've been running the ubiquitous and once common-fit Toyo T1Rs that I know are now discontinued and only had a V rated front. The forums seem to have very mixed views on these tyres but a lot of that seems to come from how the car is used. I use my car purely on the road so am not worried about track damage and I drive in the rain when it falls but don't make a point of going out specifically to drive in the rain!

When I bought the car it was running well-worn Porsche-specification Conti SportContact 2s on the rear and nearly new Toyo T1S on the front and the Conti's were so good that the front-end was terrifying in the wet. When I first fitted the T1Rs all round I hated the soft sidewalls and the 2-stage movement into a corner of tyre flex then suspension but the tyres bed in and you get used to it and the car is one of our most comfortable!

Looking to replace with the same sizes now seems nigh impossible and limited as follows:

Toyo T1R with TVR logo (late 2018) all round but with wider 225/50 fronts so higher aspect ratio and no PAS remember
Toyo TR1 all round (cannot find any feedback on these from TVR owners yet?)
Uniroyal Rainsports 5s all round with the front in correct size and the rear in 225/50/16 (sub-500 size)

Am I missing anything? What is current perceived wisdom? I see lots of love for the Uniroyals but am not sure I want a narrower rear and equally am not sure I want a wider front? Will I be a TR1 Guinea Pig?!

Thanks for any guidance, this used to be much easier I'm sure!


magpies

5,145 posts

189 months

Friday 15th May 2020
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what width wheels are you using?

Griffit

Original Poster:

370 posts

214 months

Friday 15th May 2020
quotequote all
Standard Estorils - 7* 15 & 7.5*16

griffdude

1,837 posts

255 months

Friday 15th May 2020
quotequote all
I put soft tyres on mine- as the cars do such low mileage grip is more important than longevity.
I use R888Rs.😁

lancepar

1,041 posts

179 months

Friday 15th May 2020
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Mines an early pre-cat, non PS, and had these very old Toyos on it.



So I've replaced them recently with Uniroyal Rainsport 5 tyres same size but rears are OTT "Y" speed rated.

And gone back to Amil rims.



Just waiting to give em a go now GA flying restrictions are being relaxed.clap

Stay Alert
cool


Griffit

Original Poster:

370 posts

214 months

Saturday 16th May 2020
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Seems my memory has failed me and I have 205/55R15 on the front.

Not sure that makes choice any better as rear size still an issue. Am I going to notice dropping from 245 to 225? I assume less propensity for understeer, less outright traction, more progressive recovery from breakaway?

Hoover.

5,988 posts

249 months

Sunday 17th May 2020
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Toyo R1R are the way to go...…fantastic tyre for road use wink

Griffit

Original Poster:

370 posts

214 months

Monday 18th May 2020
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Sadly also discontinued as far as I can tell?

Hoover.

5,988 posts

249 months

Monday 18th May 2020
quotequote all
Ohhh yeah... sorry about that.....

Might be worth looking at the Yokahama AD08RS... you may have to play around with different width/heights to get the same rolling radius..... precat original spec on rear was 225/50/16 from memory

magpies

5,145 posts

189 months

Monday 18th May 2020
quotequote all
according to all the guides 245 is too wide for 7.5" rims - min 205 ideal is 215 or 225 and max 235

Griffit

Original Poster:

370 posts

214 months

Monday 18th May 2020
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Apparently so and the Bible suggests 225/50 or 235/50 so 225/50 RS5s it shall be. Losing 20mm will still be better than what's on there now!

Rob_the_Sparky

1,000 posts

245 months

Monday 18th May 2020
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Back end of last year I put the Toyo TR1 on the rear and they are much better than the previous very old rears. I'm happy with them but as I don't have a lot to compare these with I'm not sure what to say. In theory they should be better than the TR1s I have on the front...

phib

4,488 posts

266 months

Friday 29th May 2020
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Sorry bit late to this one, I have just done the same.

You can get fronts from TVR parts in Alton and you can get rears from Adams and Page in Highwycombe.

Got mine a couple of weeks ago

Phib

citizen smith

765 posts

188 months

Friday 29th May 2020
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Hello,

The 205/55 x 15 are fitted because the car has no PAS, but you can fit the 225's although the steering would be a bit heavier at parking speeds.

carl350i

145 posts

257 months

Friday 29th May 2020
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My Griffith has always had the same sizes as yours, 205/50/15 and 245/45/16

Griffit

Original Poster:

370 posts

214 months

Friday 29th May 2020
quotequote all
If you want to replace with matched make and model tyres you'll be going Uniroyal 225/50R16 rears with 205/55R15 fronts or Toyo TR1 with 245/45R16 rear and 205/50R15 fronts as they don't do a 55 profile.

I've reduced the rears to 225 like earlier cars as I don't like mismatched tyres and didn't want to lose 10mm ride height at the front with a 50 profile. That spoiler and exhaust have enough trouble without me lowering!

As a side note, you cannot get two rear tyres in the boot! Mine are going on tomorrow once I get them to my fitter.

citizen smith

765 posts

188 months

Friday 29th May 2020
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You might need to tell your insurance company about the tyre size change. Could be classified as a modification - some companies are picky!

Mr.Grooler

1,183 posts

232 months

Saturday 8th January 2022
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Griffit, how are you getting on with your 225 rear Rainsports? Is anyone else using them too?

I am in the same position now (Toyo T1R, 205/55/15 and 245/45/16), I need to change the fronts and can’t find replacement Toyos so considering options if I change all four to keep a match. Mine is a non-PAS 500 with standard Estorils.

Griffit

Original Poster:

370 posts

214 months

Sunday 9th January 2022
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Well they are still on the car... I did a 435 mile spirited days drive to see if they bedded-in properly and either they were better afterwards or I had grown accustomed to them. Annoyingly I don't remember the pressures I settled on but believe fronts were raised to match rears for a bit more turn-in response.

They are still too soft in the sidewall in my opinion and liking and turn the car from a sports car into a cruiser. I'm tempted by the Yokohama option still but not Michelin is starting to produce some "heritage" sizes in modern compounds, which might be worth watching?

Mr.Grooler

1,183 posts

232 months

Sunday 9th January 2022
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Thanks Griffit,

I don’t tend to drive my Griff too hard so those might suit me fine still.

By Yokos I assume you mean the Advan Fleva V701, which appears to be made in the same sizes as the Rainsports (205/55/15 and 225/50/16).

Is anyone here running these on a TVR yet?