Tire size for 20" wheels

RRKnight

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Hi I'm getting 20" wheels for the supra 20X9 front and 20X10.5 rear.

What tire size combo should I get?

255/30/20 front and 275/30/20 rear
OR
245/45/20 front and 285/30/20 rear (This is cheaper)

Also what tire brand?

Nitto Invo or Continental Extreme Contact DSW06 or any suggestion?

Looking for budget street setup only and no track.

What are you guys running on 20?
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OneFastDoc

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Stock front 255/35/19 diameter = 661.1mm

255/30/20 diameter = 661mm (.02% difference)

245/45/20 diameter = 728.5mm (9.25% difference). This would be a bad choice.

Alternative front tire size
265/30/20 diameter = 667mm (.88% difference)

Stock rear 275/35/19 diameter = 675.1mm

275/30/20 diameter = 673mm (.31% difference)

285/30/20 diameter = 679mm (.57% difference)

Either one of the rear tires would be ok.

Personally, I would do the 265/30/20 front and 285/30/20 rear. Overall diameters are similar to stock and both front and rear are 10mm wider than stock which would maintain balance without creating more understeer or oversteer. I did that with my GT-R and went from 255 to 285 up front, and 285 to 315 in the rear.

As a performance tire the Nitto Invo isnā€™t very good. Definitely a downgrade from the Michelins. I tried the Continentals on my GT-R and they absolutely sucked. Michelin Pilot Sport 4S are good. Bridgestone RE070 and RE71R, Yokohama Advan Neova, Hankook RS3 and RS4, Kuhmo ECSTA V720 are all good dry grip tires. Pirelli Corday are decent, and Trofeo R is great but a track tire. The only Nittos I would get are NT-01 which I had on my GT-R but those are R compound tires that only last 7,000 miles (but provide mega grip).

I looked on Tire Rack and for a 265/30/20 front and 285/30/20 rear, it looks like your best option is the Michelin Pilot Sport 4S.
 

s219

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Be sure to check clearance to the front struts if going any wider than stock up front (and/or varying offset). There is only about a finger's worth of clearance on many BMWs and I'd expect the Supra to be about the same. Worth checking before pulling the trigger.
 
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RRKnight

RRKnight

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Stock front 255/35/19 diameter = 661.1mm

255/30/20 diameter = 661mm (.02% difference)

245/45/20 diameter = 728.5mm (9.25% difference). This would be a bad choice.

Alternative front tire size
265/30/20 diameter = 667mm (.88% difference)

Stock rear 275/35/19 diameter = 675.1mm

275/30/20 diameter = 673mm (.31% difference)

285/30/20 diameter = 679mm (.57% difference)

Either one of the rear tires would be ok.

Personally, I would do the 265/30/20 front and 285/30/20 rear. Overall diameters are similar to stock and both front and rear are 10mm wider than stock which would maintain balance without creating more understeer or oversteer. I did that with my GT-R and went from 255 to 285 up front, and 285 to 315 in the rear.

As a performance tire the Nitto Invo isnā€™t very good. Definitely a downgrade from the Michelins. I tried the Continentals on my GT-R and they absolutely sucked. Michelin Pilot Sport 4S are good. Bridgestone RE070 and RE71R, Yokohama Advan Neova, Hankook RS3 and RS4, Kuhmo ECSTA V720 are all good dry grip tires. Pirelli Corday are decent, and Trofeo R is great but a track tire. The only Nittos I would get are NT-01 which I had on my GT-R but those are R compound tires that only last 7,000 miles (but provide mega grip).

I looked on Tire Rack and for a 265/30/20 front and 285/30/20 rear, it looks like your best option is the Michelin Pilot Sport 4S.
Thanks! I am going to go with 255/30/20 front and 295/30/20 rear. I like a beefier rear. I've heard the Firestone firehawk indy 500 are great bang for your buck tires. Same with the Falken Azenis FK510. Your thoughts on these size and tires?
 

OneFastDoc

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Stock front 255/35/19 diameter = 661.1mm

255/30/20 diameter = 661mm (.02% difference)

245/45/20 diameter = 728.5mm (9.25% difference). This would be a bad choice.

Alternative front tire size
265/30/20 diameter = 667mm (.88% difference)

Stock rear 275/35/19 diameter = 675.1mm

275/30/20 diameter = 673mm (.31% difference)

285/30/20 diameter = 679mm (.57% difference)

Either one of the rear tires would be ok.

Personally, I would do the 265/30/20 front and 285/30/20 rear. Overall diameters are similar to stock and both front and rear are 10mm wider than stock which would maintain balance without creating more understeer or oversteer. I did that with my GT-R and went from 255 to 285 up front, and 285 to 315 in the rear.

As a performance tire the Nitto Invo isnā€™t very good. Definitely a downgrade from the Michelins. I tried the Continentals on my GT-R and they absolutely sucked. Michelin Pilot Sport 4S are good. Bridgestone RE070 and RE71R, Yokohama Advan Neova, Hankook RS3 and RS4, Kuhmo ECSTA V720 are all good dry grip tires. Pirelli Corday are decent, and Trofeo R is great but a track tire. The only Nittos I would get are NT-01 which I had on my GT-R but those are R compound tires that only last 7,000 miles (but provide mega grip).
Thanks! I am going to go with 255/30/20 front and 295/30/20 rear. I like a beefier rear. I've heard the Firestone firehawk indy 500 are great bang for your buck tires. Same with the Falken Azenis FK510. Your thoughts on these size and tires?
Well, the stock tires have a 2.07% difference front to rear. The tire sizes you mentioned would give you a 3.5% difference. That translates to a 1.43% difference from the stock setup. Probably ok as the BMW M3 crowd gets away with this degree of difference without any issues (meaning traction control or stability systems freaking out. On an AWD car like the GT-R, we have to keep the overall front and rear diameters very close but in a rear wheel drive car like the Supra you can usually get away with a lot more.

Regarding the Firestone tires, they are supposed to be a good bang for the buck. No one uses them on GT-Rs, but I also have an M3 and a few of those guys have tried them out. They say the Firestones have 80% of the grip of the Michelins at 50% of the cost. So if you are looking at saving money, itā€™s probably a decent choice. I tend to go with tires that offer the highest dry grip regardless of the cost.

https://f80.bimmerpost.com/forums/showthread.php?t=1639989&highlight=Firestone+firehawk+indy
 
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RRKnight

RRKnight

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Well, the stock tires have a 2.07% difference front to rear. The tire sizes you mentioned would give you a 3.5% difference. That translates to a 1.43% difference from the stock setup. Probably ok as the BMW M3 crowd gets away with this degree of difference without any issues (meaning traction control or stability systems freaking out. On an AWD car like the GT-R, we have to keep the overall front and rear diameters very close but in a rear wheel drive car like the Supra you can usually get away with a lot more.

Regarding the Firestone tires, they are supposed to be a good bang for the buck. No one uses them on GT-Rs, but I also have an M3 and a few of those guys have tried them out. They say the Firestones have 80% of the grip of the Michelins at 50% of the cost. So if you are looking at saving money, itā€™s probably a decent choice. I tend to go with tires that offer the highest dry grip regardless of the cost.

https://f80.bimmerpost.com/forums/showthread.php?t=1639989&highlight=Firestone+firehawk+indy
Thanks for the input!
 
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RRKnight

RRKnight

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Don't save money on tires... that is just ridiculous.
Not planning to track the car and only driving on dry days in the summer. Don't need all the bells and whistles on the tires. I rather use the money on other mods.
 

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So you buy a 50k+ Supra, and then neuter it by putting on 20" (what wheels? My guess is a cheap ass, heavy weight replica) and shit tires... :thumbsdown:

If you can't do it right, then don't do it. The stock wheels are nice, the stock tires are GREAT, leave them.
 

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Doing some test fitting, weighing, etc. next week. Will report.
 
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RRKnight

RRKnight

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So you buy a 50k+ Supra, and then neuter it by putting on 20" (what wheels? My guess is a cheap ass, heavy weight replica) and shit tires... :thumbsdown:

If you can't do it right, then don't do it. The stock wheels are nice, the stock tires are GREAT, leave them.
I was thinking Vossen, BC forged or anything that is flow form or hybrid forged. I wouldn't call those tires shit. They are budget tires but not a no name brand. Look up the reviews they do hold pretty well with the Michelin Pilot Super Sports.
 

OneFastDoc

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You really want to get a fully forged wheel, not flow formed or hybrid forged. The best bang for the buck on a fully forged wheel are the Titan 7. I went with a custom set of Rays Volk G25 wheels on my GT-R, and was going to get some Titan 7 wheels for my M3 until some kid crashed into it.
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