another tire thread, seeking advice/input Options

[brant]

so the last time I attended an SVRA event I took some aged out toyo's (RA1's) that I've owned for a few years...

they were as bad as I expected and put a taint' on the weekend
I'm used to driving on hoosiers A6/A7 and realize that I'm not going to get anywhere close to that level of grip from aged out toyo's


so I'm working on my summer schedule and planning for this year
I think I will attend another SVRA event or two
and will buy fresh tires this time around

the approved list is below:
I will shave the new set
my experience (recent) has really all been with the hoosier radials that are not allowed

I'm aware I may need to make some alignment changes with a bias ply, but ultimately I want the fastest tire so will take steps as needed.

I would love feedback from anyone that has done testing or driven multiple brands of tires on the approved list

ultimately, I'd like to buy a set of the stickiest tires I can
I noticed that many of the racers were running the RA1's and hoosier vintage tires
I assume these are probably the 2 fastest options

but would love feedback from anyone as I plan for the summer
thanks in advance

-------------------
Approved tires:
Avon: ACB10, CR6ZZ
Goodyear: Blue Streak
BFG: g- Force Sport
Hankook Ventus RS2, RS3-V2, Z213, Z207
BFG: g-Force RIVAL
Bridgstone: RE 11
Toyo: RA1, R888, R1R
Dunlop: Direza Sport Z1, Z11 or Z11-Star
Hoosier: Street TD & Speedster
Yokohama: A032, A048
Falken: RT615
Kumho : V700, ECSTA XS
Nitto: NT01 (minimum 3/32” tread depth)

Specifically Prohibited for all Group 6:
Slicks or any of the following tires: Avon Tech RA, Avon ZZR, ZZS or CR500, BFG G-Force R1, Goodyear GS/CS/RS, Hankook Z214, Hoosier DOT Radial, (A6, R6, R7 or SM7), Kumho V710, Toyo RR, or any other “street slick” type DOT tire.

[Racer]

is there a treadwear minimum you are having to meet (sounds like a 140 or so rating is what most of that list carries.

IIRC, years ago when the NTo1 was introduced, it was a "retreaded" RAI. Folks were split, Some liked the RA1, some the Nitto.

I always liked the RA1 from a dual use purpose (that being driving to a DE and then using them at a DE). Never ran the crack pipe that is hoosiers. RA1's are a great tire overall.

I ran them on my 911 (225-50-16 and 245-45-16) as well as my 914 (205-50-15). I would rate them at the top of the "streetable" ones in your list above.

What size are you needing to run?

[brant]

is there a treadwear minimum you are having to meet (sounds like a 140 or so rating is what most of that list carries.

IIRC, years ago when the NTo1 was introduced, it was a "retreaded" RAI. Folks were split, Some liked the RA1, some the Nitto.

I always liked the RA1 from a dual use purpose (that being driving to a DE and then using them at a DE). Never ran the crack pipe that is hoosiers. RA1's are a great tire overall.

I ran them on my 911 (225-50-16 and 245-45-16) as well as my 914 (205-50-15). I would rate them at the top of the "streetable" ones in your list above.

What size are you needing to run?

its SVRA tire rules
they don't state a minimum treadwear, but the tires on their approved list are all leaning towards longer wear and less grip. I believe its how they are limiting speed and performance. Funny because the motors in those cars are definitely not hurting for performance (frank becks 2.5/6 was rumored to be 296hp at the wheels), yet he drives on new/shaved RA1's too....


they are even limiting how much shaving can be done with a minimum tread depth too


I run 225/50/15's at all 4 corners.
it is slightly too large of a tire for my car's weight
but I've used it to run softer compounds in the past and increase my longevity by not creating as much heat per contact patch


when you ran the RA's did you ever shave them?
and if you have seat experience in shaved vs unshaved I would love to hear your experience.


oddly I can't find any NT01's for sale with shaving.
and I don't know any local shops that do shaving

anyone have idea's about that?

[wndsrfr]

is there a treadwear minimum you are having to meet (sounds like a 140 or so rating is what most of that list carries.

IIRC, years ago when the NTo1 was introduced, it was a "retreaded" RAI. Folks were split, Some liked the RA1, some the Nitto.

I always liked the RA1 from a dual use purpose (that being driving to a DE and then using them at a DE). Never ran the crack pipe that is hoosiers. RA1's are a great tire overall.

I ran them on my 911 (225-50-16 and 245-45-16) as well as my 914 (205-50-15). I would rate them at the top of the "streetable" ones in your list above.

What size are you needing to run?

its SVRA tire rules
they don't state a minimum treadwear, but the tires on their approved list are all leaning towards longer wear and less grip. I believe its how they are limiting speed and performance. Funny because the motors in those cars are definitely not hurting for performance (frank becks 2.5/6 was rumored to be 296hp at the wheels), yet he drives on new/shaved RA1's too....


they are even limiting how much shaving can be done with a minimum tread depth too


I run 225/50/15's at all 4 corners.
it is slightly too large of a tire for my car's weight
but I've used it to run softer compounds in the past and increase my longevity by not creating as much heat per contact patch


when you ran the RA's did you ever shave them?
and if you have seat experience in shaved vs unshaved I would love to hear your experience.


oddly I can't find any NT01's for sale with shaving.
and I don't know any local shops that do shaving

anyone have idea's about that?

An old school tire shop here does it....they call it "buffing"...to take out flat spots or cupping...$10 per tire & they'll take them down to whatever you want...even offered to put in stagger for circle track use.