[Karmic Man]

Originally Posted by kart driver

The regulations changed. Size doesn't matter. The treadwear CANT be lower than 100.


Which are the best tires for time attack competition for M2C?

- OEM rims (9 and 10 respectively)
- price doesn’t matter
- lap time is the only criteria.



As of now I see the following options:

1) Yokohama 052: 255/35/19 + 275/35/19 (currently have those and I am happy in principle)

2) Cup2: 265/30/19 + 295/30/19

3) Nankang AR-1: 245/35/19 + 265/35/19

4) Goodyear F1 Supercar 3R: 245/35/19 + 265/35/19

Your time attack rule is 1 lap only or simply picking the fastest time during a session?

[kart driver]

Originally Posted by Karmic Man

Your time attack rule is 1 lap only or simply picking the fastest time during a session?

You have time for 5 laps.

1st lap is typically a warm up lap.

2nd lap - you try your best

3d lap - cool down lap or you try your best (depends on your decision)

4th lap is you try again your best lap

5th lap - cool down lap


They take the best time of these laps.

[Karmic Man]

Originally Posted by kart driver

You have time for 5 laps.

1st lap is typically a warm up lap.

2nd lap - you try your best

3d lap - cool down lap or you try your best (depends on your decision)

4th lap is you try again your best lap

5th lap - cool down lap


They take the best time of these laps.

I really doubt under your TA rule, you can get a faster setup than the Advan A052 255/275 using stock rims.

The issue lies with the limited R tyre sizes available in 19 inch..I am not looking forward to the 20 inch on the G87 and I already can envisage people tracking often will move from 20 down to 19 or even 18

If you don't have the M performance BBK and if the rules permit, I would suggest getting a set of stock OG M2 18 inch wheels and run Advan A050, 265/35 & 295/35. That would be one of the fastest setup on OEM 18. A050 G/S compound is popular in TA events. It takes longer to warm up than the A052 but slightly faster. Potenza RE-11S or RE-12D Type A are both R tyres (faster than the RE-71RS or the discontinued RE-71R) available in 265/35 & 295/35 18 but they are not available in Europe,

[kart driver]

Originally Posted by Karmic Man

I really doubt under your TA rule, you can get a faster setup than the Advan A052 255/275 using stock rims.

The issue lies with the limited R tyre sizes available in 19 inch..I am not looking forward to the 20 inch on the G87 and I already can envisage people tracking often will move from 20 down to 19 or even 18

If you don't have the M performance BBK and if the rules permit, I would suggest getting a set of stock OG M2 18 inch wheels and run Advan A050, 265/35 & 295/35. That would be one of the fastest setup on OEM 18. A050 G/S compound is popular in TA events. It takes longer to warm up than the A052 but slightly faster. Potenza RE-11S or RE-12D Type A are both R tyres (faster than the RE-71RS or the discontinued RE-71R) available in 265/35 & 295/35 18 but they are not available in Europe,

I have original BBKs on my M2C, which means 19 rims is the minimum size.


Would
Nankang AR1 265/35/19 + 275/35/19
or
Goodyear Eagle F1 Supercar 3R 265/35/19 + 285/35/19
provide better lap times than 255+275 Yokohama A052?

[CSBM5]

Many have reported issues with too large of a diameter with the 265/35-19 up front -- rubbing into the fender liner (which may or may not be relieved with a heat gun and some work...).

[Karmic Man]

Originally Posted by kart driver

I have original BBKs on my M2C, which means 19 rims is the minimum size.


Would
Nankang AR1 265/35/19 + 275/35/19
or
Goodyear Eagle F1 Supercar 3R 265/35/19 + 285/35/19
provide better lap times than 255+275 Yokohama A052?

Even if the tyres compound are the same it is not guaranteed that 265/285 35 is faster than 255/275 35 if the suspension settings remain the same.

The big issue here is aero. Running 265/285 in 35 profile will slightly raise the height of the car which means a higher centre of gravity and more importantly, less downforce on the front. You might experience more understeer on fast sweepers. If you can run those sizes in a 30 profile then it may work but again not guaranteed because the A052 is still grippier over the 3R inch vs inch. If the critical corners of your track are high speed, I would not bother with the 265/285 35 route as you want the car to be as low as possible which means stick with shorter (relatively) tyres since you won’t be able to drop the suspension without moving to coilovers.

[VisualEcho]

Originally Posted by Karmic Man

Even if the tyres compound are the same it is not guaranteed that 265/285 35 is faster than 255/275 35 if the suspension settings remain the same.

The big issue here is aero. Running 265/285 in 35 profile will slightly raise the height of the car which means a higher centre of gravity and more importantly, less downforce on the front. You might experience more understeer on fast sweepers. If you can run those sizes in a 30 profile then it may work but again not guaranteed because the A052 is still grippier over the 3R inch vs inch. If the critical corners of your track are high speed, I would not bother with the 265/285 35 route as you want the car to be as low as possible which means stick with shorter (relatively) tyres since you won’t be able to drop the suspension without moving to coilovers.

And many times the larger tires are heavier, which doesn't help either.

[n8dgr84]

A Supercar 3R or Trofeo R are in a different class than the A052, literally.
In your case, with the ability to warm up the tires, I'd go for the 100TW Supercar 3R (in stock sizes) over the 200TW A052.

If you want to drive to the event and back on the "race" tires, then the A052 is the correct choice. The SC3R are more of an "install at the track" tire. Don't want to cycle them and wear the tread off in transit.

[KevinC]

Go bigger.

[kart driver]

Originally Posted by Karmic Man

Even if the tyres compound are the same it is not guaranteed that 265/285 35 is faster than 255/275 35 if the suspension settings remain the same.

The big issue here is aero. Running 265/285 in 35 profile will slightly raise the height of the car which means a higher centre of gravity and more importantly, less downforce on the front. You might experience more understeer on fast sweepers. If you can run those sizes in a 30 profile then it may work but again not guaranteed because the A052 is still grippier over the 3R inch vs inch. If the critical corners of your track are high speed, I would not bother with the 265/285 35 route as you want the car to be as low as possible which means stick with shorter (relatively) tyres since you won’t be able to drop the suspension without moving to coilovers.

The height is adjusted accordingly. I have MP coilovers.

There are no high speed corners at the racetrack I am planning to have TA competition.

I didn’t know that A052 is grippier than 3R. If this is the case, then I am staying with A052 255+275.

[kart driver]

Originally Posted by n8dgr84

A Supercar 3R or Trofeo R are in a different class than the A052, literally.
In your case, with the ability to warm up the tires, I'd go for the 100TW Supercar 3R (in stock sizes) over the 200TW A052.

If you want to drive to the event and back on the "race" tires, then the A052 is the correct choice. The SC3R are more of an "install at the track" tire. Don't want to cycle them and wear the tread off in transit.

I am a bit confused.

Which tire secures better lap times? A052 or SC3R if running same size?

[n8dgr84]

Originally Posted by kart driver

I am a bit confused.

Which tire secures better lap times? A052 or SC3R if running same size?

SC3R is my guess.
Probably wont last as long as the A052, especially driving on roads.

Your call.

[kart driver]

Originally Posted by n8dgr84

SC3R is my guess.
Probably wont last as long as the A052, especially driving on roads.

Your call.

I don’t care how long it will last on the road. The only important criteria that it provides better lap times.

[Fabb]

Originally Posted by kart driver

I don’t care how long it will last on the road. The only important criteria that it provides better lap times.

SC3R is superior in both lap times and also grip drop off under heat. A052 is easy to overheat like every other fast tw200 tires. SC3R should give you more consistent feeling across the session.

[Karmic Man]

Originally Posted by kart driver

The height is adjusted accordingly. I have MP coilovers.

There are no high speed corners at the racetrack I am planning to have TA competition.

I didn’t know that A052 is grippier than 3R. If this is the case, then I am staying with A052 255+275.

Apologies, i got confused with the Goodyear 3R vs 3. The A052 is grippier than the 3 but against the 3R I am uncertain.

If your track is mostly low speed high G corners and the fact you have the MP suspension to reduce height, then the 3R 265/285 35 may be a viable option.

I have not known of a non slick tyre that has a definitive edge over the A052 in TA apart from full on R tyres (A050, RE-11S/RE-12D, Hossier…etc) that are not road legal or simply not available in most countries.

If the tyre performance are so close with what’s available to you, my honest opinion is spend more time to dial in the suspension and alignment to the point that you are able to drive at 10/10. Lastly, spend money on weight reduction like getting the M performance carbon bonnet

[driver91]

I havent used the a052 but i can say the 3rs are outstanding even in stock size> if they ever make a one size up that would be killer