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2018 race tires

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Speedracer Avatar
Speedracer Platinum Member Hap Waldrop
Greenville, SC, USA   USA
1967 MG MGB Racecar "The Biscuit"
In reply to # 3679896 by Gulf MGB If you look at the Jan 2018 SVRA Tire regulations, The Nitto NT-01's are still legal to run, just with the same tread depth at race completion statement...

https://svra.com/wp-content/uploads/2018/01/SVRA_Tire_Regulations_1.18-1.pdf

Kenny, yeah I see that now, it was on the memo there last year without that date, but with the understanding the NT-01 would go away for this year, the 1/20/18 listed revision is new on that memo. Well that's good to know, so it appears all the fears were unwarranted.



Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com


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John Hamilton Avatar
Laurel Hill, FL, USA   USA
1963 Austin-Healey Sprite
1965 MG MGB "The Great Pumpkin"
1968 MG MGB GT "Buck"
1970 MG MGB "Dad's Car"
Kenny, your link is outdated by 1 month. This one dated February 2018 specifically removes the RA1 and NT01 from the approved tire list.

http://www.svra.com/wp-content/uploads/2016/05/SVRA_Tire_Regulations_2.17.pdf



If I can't be fast, I'll just be obnoxious!

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Gulf MGB Avatar
Gulf MGB Kenny Williamson
Pensacola, FL, USA   USA
1963 MG MGB "Flying Frigidaire"
1965 MG MGB "Gulf MGB"
John, I think the link you are referring to is dated Feb 2017, not Feb 2018...

In reply to # 3680667 by John Hamilton Kenny, your link is outdated by 1 month. This one dated February 2018 specifically removes the RA1 and NT01 from the approved tire list.

http://www.svra.com/wp-content/uploads/2016/05/SVRA_Tire_Regulations_2.17.pdf

Speedracer Avatar
Speedracer Platinum Member Hap Waldrop
Greenville, SC, USA   USA
1967 MG MGB Racecar "The Biscuit"
In reply to # 3679896 by Gulf MGB If you look at the Jan 2018 SVRA Tire regulations, The Nitto NT-01's are still legal to run, just with the same tread depth at race completion statement...

https://svra.com/wp-content/uploads/2018/01/SVRA_Tire_Regulations_1.18-1.pdf

Yep, that's what I read too, the Nittos are now in again with SVRA, revised 1-20-18 in the link Kenny provided.



Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com


Member Services:
MG/ Triumph Performance Street/Race Engines - Cylinder Head Porting - Modified SU HS Carbs - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sport Cars, and others
bugeyebob Avatar
bugeyebob Bob B
northern catskills, NY, USA   USA
Yes, they are legal, IF you have deep pockets and can afford to buy a new set every weekend !! If you realize that just two circumferential grooves start life at 6/32" and all the others are at 3/32" then the tires are are considered illegal after 1/32" wear measured anywhere across "the complete racing surface of the tire". Read the new SVRA tire regulations and let me know if I'm interpreting this wrong. Tread depths obtained from Nitto website


Bob

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Speedracer Avatar
Speedracer Platinum Member Hap Waldrop
Greenville, SC, USA   USA
1967 MG MGB Racecar "The Biscuit"
In reply to # 3680983 by bugeyebob Yes, they are legal, IF you have deep pockets and can afford to buy a new set every weekend !! If you realize that just two circumferential grooves start life at 6/32" and all the others are at 3/32" then the tires are are considered illegal after 1/32" wear measured anywhere across "the complete racing surface of the tire". Read the new SVRA tire regulations and let me know if I'm interpreting this wrong. Tread depths obtained from Nitto website


Bob

Bob they are actually deeper than advertised, I did 8 weekends on a set before they would have been deemed illegal. The set on the car now, bought in 2012, 3 are still legal after 9 weekends of racing, only the L/F now is wiping out the most outer tread grooves,and now illegal.



Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com


Member Services:
MG/ Triumph Performance Street/Race Engines - Cylinder Head Porting - Modified SU HS Carbs - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sport Cars, and others
bugeyebob Avatar
bugeyebob Bob B
northern catskills, NY, USA   USA
Good to know, thanks Hap.

Bob

Gulf MGB Avatar
Gulf MGB Kenny Williamson
Pensacola, FL, USA   USA
1963 MG MGB "Flying Frigidaire"
1965 MG MGB "Gulf MGB"
Bob, I am of the understanding that the main issue is racers shaving the tires to the min tread depth then racing on them, in essence they turn into slicks during the race and actually improve as they wear, giving an "unfair advantage". I don't think it has ever been a "tire wear" issue...

In reply to # 3680983 by bugeyebob Yes, they are legal, IF you have deep pockets and can afford to buy a new set every weekend !! If you realize that just two circumferential grooves start life at 6/32" and all the others are at 3/32" then the tires are are considered illegal after 1/32" wear measured anywhere across "the complete racing surface of the tire". Read the new SVRA tire regulations and let me know if I'm interpreting this wrong. Tread depths obtained from Nitto website


Bob

Speedracer Avatar
Speedracer Platinum Member Hap Waldrop
Greenville, SC, USA   USA
1967 MG MGB Racecar "The Biscuit"
In reply to # 3681130 by Gulf MGB Bob, I am of the understanding that the main issue is racers shaving the tires to the min tread depth then racing on them, in essence they turn into slicks during the race and actually improve as they wear, giving an "unfair advantage". I don't think it has ever been a "tire wear" issue...


In the MGB vintage racing world it would be more like wore them down because one was either too tight budgeted, or too frugile to buy a new setsmiling smiley In last few events when I would worry about tread depth getting thinner, I would go to the race and see guys who NT-01s were way more worn than mine, and it wasn't intended for an advantage from any of those guys, more like trying get one more weekend out of them smiling smiley Oh and can never remember seeing a car with really worn radials kicking everyone arse, not to say it has not happen, it is just not the norm, but vintage tech crews have to deal with the ones outside the norm.



Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com


Member Services:
MG/ Triumph Performance Street/Race Engines - Cylinder Head Porting - Modified SU HS Carbs - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sport Cars, and others
John Hamilton Avatar
Laurel Hill, FL, USA   USA
1963 Austin-Healey Sprite
1965 MG MGB "The Great Pumpkin"
1968 MG MGB GT "Buck"
1970 MG MGB "Dad's Car"
You guys are right, that link does say 2017. Either way, I'm too cheap to worry about legality at the limit, so I went to the R888.



If I can't be fast, I'll just be obnoxious!

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