SVRA Supplemental Tire Regulations

SVRA Supplemental Tire Regulations

SVRA Supplemental Tire Regulations (Not for Gold Medallion Classes) (Revision Date 2/2017) Wheel diameter must be as originally fitted unless permitt...

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SVRA Supplemental Tire Regulations (Not for Gold Medallion Classes) (Revision Date 2/2017)

Wheel diameter must be as originally fitted unless permitted in (the Spec Sheets). Tires must be mounted following the manufacturers specification for wheel width. Bodywork may not be modified beyond period specifications to accommodate approved tires.

Since tires are a consumable item, SVRA requires tires that are currently available and are of a reasonable age. There is no doubt that modern tire compounds and construction are vastly improved from what was available to competitors when our cars were originally raced. The intent of these rules is to specify tires that are a reasonable compromise between the tires raced with during the period and what is currently available. Availability in sufficient sizes to maintain equitable tire performance within the Group and Class structure is of primary importance. We are looking for an appropriate level of dry grip for all the cars in a group, to avoid overloading suspension components. Tires are evaluated by looking at their aspect ratio, tread pattern, carcass design and wear rating. Some tire sizes/brands are acceptable based on true tire diameter and crosssection regardless of the listed aspect ratio. Some tires listed have been discontinued. These “Legacy” tires remain on the list as long as the age of the existing stock /sizes remain safe for racing use.

Group 1 - Molded Treaded Tires Minimum aspect ratio of 60, except as listed on the right, tread depth— no less than 2/32” remaining, at all times, over 75% of the tire.

Approved Tires: Avon Racing: 5.0/22-13 & 6.0/22-13 ACB 9 (ACB10 not permitted), CR6ZZ Goodyear Eagle: 5.50/15 G12 or 12A American Racing: 18/6.0-10 GT Hoosier: 165/70-10, 185/60-13, 205/60-13, A70-13, 5.0-15; Street TD, Vintage TD, Speedster

Note: Bodywork may NOT be modified beyond period specifications to accommodate listed Any Treaded, DOT approved Tires with a UTQG of 100 or greater with appropriate tires.

Speed Rating and a minimum Aspect Ratio of 60

Wheels may be of an alternate material but must be of period design. They must be the correct diameter and width as specified within the Make and Model Regulations.

For Toyo RA1’s and Nitto NT01’s, please see page 6 of this document

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 1

Group 2 - Molded Treaded Tires As listed on right or in the latest Monoposto Racing Rules and Regulations. Monoposto prepared FF’s will use Monoposto rules and regulations, please find the rules at monoposto.com

Approved Tires: Monoposto F1, F2, F3, FB, FSV: Dunlop: L, M, Post Historic CR65 and CR82 Avon: All-Weather H-003—H009 Grooved slicks that meet the Monoposto Racing and SVRA approved tread standard. A template is available. It is the driver’s responsibility to ensure that all grooved slicks meet the approved standard. Formula Jr: Dunlop L-204 Hard Compound. With other tires will be run as Formula C. Formula Vee: Treaded tires per Monoposto Racing Rules. Monoposto Prepared (FFM, CFM) Formula Ford Monoposto: Club Ford Monoposto: See Monoposto tire rules at http://www.monoposto.com/ SVRA Prepared (FF, CF, PCF)

SVRA prepared Formula Fords will use the SVRA FF Rulebook Shaving or reducing tread depth of tire by any means other than normal on track driving is prohibited.

Formula Ford: Club Ford: Post Club Ford: Tires: for all classes (Wet or Dry) Front: Toyo Proxes R888, 185/60R/13 Rear: Toyo Proxes R888, 205/60R/13 Front: Hoosier 135/545-13VFF Rear: Hoosier 165/580-13VFF

Group 3 - Molded Treaded Tires

Approved Tires:

Minimum aspect ratio of 60, except as listed on the right, tread depth— no less than 2/32” remaining, at all times, over 75% of the tire.

Avon Racing: 5.0/22-13, & 6.0/22-13, 6.5/23-13 ACB9 (ACB10 not permitted), 185/70-14 (CR6), CR6ZZ Dunlop: All “L-series, up to 5.50M-13, 14, 15; 135/545-13 & 165/580-13 (9092)” Formula Ford” Goodyear Eagle: 5.50/15 G12 or G12A Hoosier: A70-13, P205/60D-13, 14 (Street TD), up to 5.50-15 (Vintage TD), 185/65-15 & 205/60-15 (Speedster)

Note: Bodywork may NOT be modified beyond period specifications to accommodate listed tires. Note: Please refer to the “Group 3 Description and Class List” for Porsche 356 tire limitations and requirements.

Any Treaded, DOT approved Tires with a UTQG of 100 or greater with appropriate Speed Rating and a minimum Aspect Ratio of 60 Wheels may be of an alternate material but must be of period design. They must be the correct diameter and width as specified within the Make and Model Regulations. Tires may not extend beyond the fender opening at the highest point of the tire.

For Toyo RA1’s and Nitto NT01’s, please see page 6 of this document

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 2

Group 4 - Molded Treaded Tires

Approved Tires:

Tires may not extend beyond the fender opening at the highest point of the tire.

Modified Category: Dunlop L-series (204 or 484 compound). Blockley Continental Production Category: All listed above plus: Hoosier Vintage TD, Hoosier Street TD or Goodyear Blue Streak Sports Car Specials

Group 5 - Treaded Tire Group While exact size and aspect ratio are not specified, the entrant must ensure that tire choice is appropriate for the car during the eligibility period.

Treaded racing tires or approved street tires with a suitable speed rating. Grooved bias-ply slicks with SVRA approved tread patterns. The approved tread patterns are: Dunlop: Dunlop: CR-65 and CR-82 tread patterns Avon: All-weather “H-Pattern" (the CR6ZZ radial and B pattern are not allowed) Goodyear: G-12 A tread pattern template is available. It is the driver’s responsibility to ensure any grooved slicks meet the approved standard.

Group 6 - Molded Treaded Tires

Approved Tires: List per Make and Model is Listed below:

Wheels and Tires:

MAKE

MODEL

AC Cobra AC Cobra AMX Sports Coupe AMC AMC Aston Martin Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Dodge Dodge Ferrari Ferrari Ford Ford Ford Ford Ford Griffith Jaguar Mercury Mercury Plymouth Plymouth Pontiac

289 427 290, 343, 360, 390 Javelin Javelin DB4, DB5 Corvette 396, 427 Corvette 427, 454 Corvette 327 Corvette 350 Corvette 350 Camaro Camaro Dart Challenger 250/275 GT, GTO 365 GTB/4, 375 Falcon Mustang Mustang Mustang BOSS 302 Mustang BOSS 429 200/400 XKE Cougar Cougar Valiant, Barracuda Barracuda Firebird

Tires may not extend beyond the fender opening at the highest point of the tire. Specifically Prohibited for Group 6: Any tire not listed in the Approved Tire list Wheels may be of an alternate material but must be of period design. They must be the correct diameter and width as specified within the Make and Model Regulations.

PRODUCTION PERIOD

1968-69 1970-72 1965-67 1968-72 1963-67 1968-69 1970-72 1967-69 1970-72 1968-72

1964-67 1968-69 1970-72 1970-72 1962 + 1966-67 1968-69 1964-67 1968-72 1967-69

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 3

CLASS ( BP ) ( AP ) ( BP ) ( TA ) ( TA ) ( BP ) ( AP ) ( AP ) ( BP ) ( BP ) ( AP ) ( TA ) ( TA ) ( AS ) ( TA ) ( BP ) ( BP ) ( AS ) (AS ) ( TA ) ( TA ) ( AP ) ( AP ) ( AP + BP ) ( AS ) ( TA ) ( AS ) ( TA ) ( TA )

TIRE GROUP a, b a, b, c a, b a, b a, b, c a. a, b, c, d a, b, c, d a, b a, b, d a, b, c, d a, b a, b, c a, b a, b, c a. a, b a, b a, b a, b a, b, c a, b, c a, b a. a, b a, b, c a, b a, b, c a, b

Approved DOT Tires: Any Treaded, DOT approved Tires with a UTQG of 100 or greater with appropriate Speed Rating and a minimum Aspect Ratio of 60

For Toyo RA1’s and Nitto NT01’s, please see page 6 of this document

Pontiac Porsche Shelby Shelby

Firebird 904 GTS (2L) GT 350 GT 500

1970-72

( TA ) ( BP ) ( BP ) ( AP )

1965-67

a, b, c e. a, b a, b, c

Tire Group ( a ):

Tire Group ( b ):

Dunlop M Series Goodyear 5.50 & 6.00-15 Vintage S.C. Special Hoosier 225/50D, 225/60D, 245/60D-15 Street TD

Goodyear Hoosier Hoosier Hoosier

Tire Group ( c )

Tire Group ( d )

Goodyear 8.00-15 Vintage Sports Car Special Hoosier 25.5/10.00-15, 27.5/11.00-15 Street TD

Hoosier 245/45-15 Street TD (front wheels only) Hoosier 25.5/8.5-15 Street TD (front wheels only)

5.50, 6.00 & 275/60D-15 26.5/9.5-15 25.5/8.5-15

7.00-15 Vintage S.C. Special Street TD Street TD Street TD (front wheels only)

Tire Group ( e ) May use Group 8 Tire Regulations.

Approved Tires:

Group 7

Racing slicks and treaded racing tires. While exact size and aspect ratio are not specified, entrants must ensure that tire choice is appropriate for the car during the eligibility period.

Group 8 - Molded Treaded Tires

Approved tires:

Minimum aspect ratio of 45, except certain car Make and Models, which have specific tire requirements listed in their Supplemental Regulations, tread depth—no less than 2/32” remaining, at all times, over 75% of the tire.

There are no specific sizes listed because of the large diversity of Group 8 cars. All Group 8 cars must use similar sized tires to what was used in the day, which is pre 1973. Using oversized tires is unacceptable and when in question, SVRA’s determination shall be the final word.

Wheels may be of an alternate material but must be of period design. They must be the correct diameter and width as specified within the Supplemental Regulations of the Make and Model.

Avon: ACB9, ACB10, CR6Z Goodyear Eagle: 5.50/15 G12 or G12A Hoosier: Street TD & Speedster

Any Treaded, DOT approved Tires with a UTQG of 100 or greater with appropriate Speed Rating and a minimum Aspect Ratio of 45 Note: Group 8 must use approved full molded treaded tires, regardless of what specification tires a car may have competed with in a prior race series.

Tires may not extend beyond the fender opening at the highest point of the tire.

For Toyo RA1’s and Nitto NT01’s, please see page 6 of this document

Group 9

Approved tires:

Monoposto Racing Rules and Regulations: monoposto.com

Suitable and appropriate slicks and treaded tires.

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 4

Group 10

Approved Tires:

Group 10 cars are expected to have only period-correct equipment and specifications.

Racing SLICKS. While exact size and aspect ratio are not specified, entrants must ensure that tire choice is appropriate for the car during the eligibility period.

Group 11

Approved Tires:

Group 11 cars are expected to have only period-correct equipment and specifications.

Racing SLICKS. While exact size and aspect ratio are not specified, entrants must ensure that tire choice is appropriate for the car during the eligibility period.

Group 12

GTU, MP1-3 Approved Tires:

Tire sizes must be used as listed in your cars specific racing series.

Hoosier: R6/R7 Any Treaded, DOT approved Tires with appropriate Speed Rating

Wheels may be of an alternate material but must be of period design. They must be the correct diameter and width as specified within your cars specific racing series Tires may not extend beyond the fender opening at the highest point of the tire.

Note: Group 12 must use above listed approved tires, regardless of what specification tires may have used in a prior racing series. Specifically Prohibited: Slicks Tires

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 5

Toyo RA-1 Wear Depths Full Tread Depth

5/32

3-4/32

2/32

These tires barely meet the spirit of the tire rules at 5/32nds and are more like Slick Tires than a Block or Vintage tread pattern. For 2017 - 4 grooves on these tires will be allowed and 2 grooves showing will be considered illegal, if a car has 2 grooves after a race the car will be disqualified. For 2018 these tires will be removed from the approved tire list.

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 6

Nitto NT01 Wear Depths Full Tread Depth

3/32nds

Legal

Illegal

For 2017, 2 grooves will be considered illegal, if a car has 2 grooves after a race the car will be disqualified. For 2018 these tires will be removed from the approved tire list.

SVRA Supplemental Tire Regulations (Revision Date 2/2017) - Page 7