One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it.
Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors
S1 SF → IM1
S2 IM1 → IM2
S3 IM2 → SF
SPd IM2 → IM3 0.02 mi
Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
By car
Car
Class
Drivers
Lap
Qual
Race
Trap
S1
S2
S3
Citation F2000
FC
2
1:23.672Brandon Dixon
1:23.854Brandon Dixon
1:23.672Brandon Dixon
138.7Brandon Dixon
31.234Brandon Dixon
30.646Brandon Dixon
21.792Brandon Dixon
Radon Rn10
FC
2
1:26.411Matthew McDonough
1:26.411Matthew McDonough
1:26.906Matthew McDonough
126.6Matthew McDonough
32.594Matthew McDonough
31.380Matthew McDonough
22.197Matthew McDonough
Radon Rn10
FC
1
1:26.411Matthew McDonough
1:26.411Matthew McDonough
1:26.906Matthew McDonough
126.6Matthew McDonough
32.594Matthew McDonough
31.380Matthew McDonough
22.197Matthew McDonough
Radon RN10
FC
1
1:33.456Paul Farmer
1:33.456Paul Farmer
123.9Paul Farmer
35.846Paul Farmer
33.439Paul Farmer
23.142Paul Farmer
Crossle 71F
FC
1
1:27.317Chuck Moran
1:27.317Chuck Moran
1:29.221Chuck Moran
135.4Chuck Moran
32.854Chuck Moran
31.315Chuck Moran
22.587Chuck Moran
Van Diemen RF06
FC
1
1:27.572Hartley MacDonald
1:29.085Hartley MacDonald
1:27.572Hartley MacDonald
135.0Hartley MacDonald
33.163Hartley MacDonald
31.554Hartley MacDonald
22.855Hartley MacDonald
VanDiemen RF03
FC
1
1:28.970Eric Presbrey
1:28.970Eric Presbrey
1:31.187Eric Presbrey
125.4Eric Presbrey
33.719Eric Presbrey
32.030Eric Presbrey
22.656Eric Presbrey
Van Diemen F2000
FC/FF
3
1:29.028Carter Sheets
1:29.028Carter Sheets
1:29.363Carter Sheets
134.3Chris Smith
33.659Carter Sheets
32.383Carter Sheets
22.714Carter Sheets
Van Diemen F2000
FC
2
1:29.028Carter Sheets
1:29.028Carter Sheets
1:29.363Carter Sheets
130.5Carter Sheets
33.659Carter Sheets
32.383Carter Sheets
22.714Carter Sheets
Van Diemen RF00
FF
1
1:31.334Chris Smith
1:34.065Chris Smith
1:31.334Chris Smith
134.3Chris Smith
34.806Chris Smith
32.940Chris Smith
23.427Chris Smith
Van Diemen RF03
FC
1
1:29.763Eric Presbrey
1:29.763Eric Presbrey
1:30.456Eric Presbrey
124.8Eric Presbrey
33.912Eric Presbrey
32.497Eric Presbrey
23.065Eric Presbrey
Piper DF05
FF
1
1:31.000Porter Aiken
1:31.000Porter Aiken
1:31.797Porter Aiken
130.3Porter Aiken
34.534Porter Aiken
33.016Porter Aiken
23.450Porter Aiken
Mygale SJ14H
FF
1
1:31.059Robert Albani
1:35.262Robert Albani
1:31.059Robert Albani
135.6Robert Albani
33.334Robert Albani
33.590Robert Albani
23.945Robert Albani
Swift DB6
FF
1
1:31.242John Robinson II
1:32.097John Robinson II
1:31.242John Robinson II
134.3John Robinson II
34.930John Robinson II
32.498John Robinson II
23.467John Robinson II
Mygale SJ13
FF
2
1:31.374Sebastian Mateo Naranjo
1:31.374Sebastian Mateo Naranjo
1:31.587Sebastian Mateo Naranjo
133.1Sebastian Mateo Naranjo
34.756Sebastian Mateo Naranjo
32.943Sebastian Mateo Naranjo
23.399Sebastian Mateo Naranjo
Van Dieman F1600
FF
2
1:31.412Joe Colasacco
1:32.745Joe Colasacco
1:31.412Joe Colasacco
134.5Joe Colasacco
34.483Joe Colasacco
32.731Joe Colasacco
23.512Joe Colasacco
Van Dieman FF
FF
1
1:31.412Joe Colasacco
1:32.745Joe Colasacco
1:31.412Joe Colasacco
134.5Joe Colasacco
34.483Joe Colasacco
32.731Joe Colasacco
23.512Joe Colasacco
Van Dieman F1600
FF
1
1:32.266Trevor Russell
1:34.162Trevor Russell
1:32.266Trevor Russell
130.5Trevor Russell
34.751Trevor Russell
33.519Trevor Russell
23.568Trevor Russell
Mygale SJ14\Honda
FF
1
1:31.421Callum Baxter
1:32.506Callum Baxter
1:31.421Callum Baxter
135.8Callum Baxter
34.649Callum Baxter
32.985Callum Baxter
23.531Callum Baxter
Mygale F1600
FF
5
1:31.562Dillon Defonce
1:32.437David Ybarra
1:31.562Dillon Defonce
134.3Dillon Defonce
34.482Dillon Defonce
32.966Dillon Defonce
23.323Dillon Defonce
Mygale GR
FF
2
1:31.574Ely Navarro
1:31.621Ely Navarro
1:31.574Ely Navarro
130.3Ely Navarro
34.547Ely Navarro
33.192Ely Navarro
23.573Ely Navarro
Van Diemen DPO2-8
FC
1
1:31.944Douglas Rocco
1:31.944Douglas Rocco
1:32.967Douglas Rocco
130.9Douglas Rocco
35.091Douglas Rocco
32.514Douglas Rocco
23.517Douglas Rocco
VanDiemen DPO2-8
FC
1
1:32.004Douglas Rocco
1:32.832Douglas Rocco
1:32.004Douglas Rocco
130.9Douglas Rocco
35.689Douglas Rocco
32.564Douglas Rocco
23.690Douglas Rocco
Mygale SJ2014
FF
1
1:32.019Sebastian Mateo Naranjo
1:32.019Sebastian Mateo Naranjo
1:32.061Sebastian Mateo Naranjo
119.9Sebastian Mateo Naranjo
34.874Sebastian Mateo Naranjo
33.156Sebastian Mateo Naranjo
23.547Sebastian Mateo Naranjo
Spectrum 14H
FF
1
1:32.421David H Livingston Jr
1:33.339David H Livingston Jr
1:32.421David H Livingston Jr
131.1David H Livingston Jr
35.020David H Livingston Jr
33.218David H Livingston Jr
23.745David H Livingston Jr
Piper DF-5
FF
1
1:32.974Michael Bulzacchelli
1:34.842Michael Bulzacchelli
1:32.974Michael Bulzacchelli
129.3Michael Bulzacchelli
35.258Michael Bulzacchelli
33.608Michael Bulzacchelli
23.786Michael Bulzacchelli
Piper DL7/Honda
FF
4
1:33.448Antonio Costantino
1:33.999Camryn Reed
1:33.448Antonio Costantino
128.6Camryn Reed
35.684Antonio Costantino
33.551Calum Dunbar
23.904Antonio Costantino
Piper DL7/Honda
FF
2
1:33.448Antonio Costantino
1:34.562Antonio Costantino
1:33.448Antonio Costantino
122.0Calum Dunbar
35.684Antonio Costantino
33.551Calum Dunbar
23.904Antonio Costantino
Piper DL7
FF
1
1:33.999Camryn Reed
1:33.999Camryn Reed
1:34.531Camryn Reed
128.6Camryn Reed
35.955Camryn Reed
33.767Camryn Reed
23.995Camryn Reed
Piper DL7\Honda
FF
1
1:36.474Brian Graham
1:36.690Brian Graham
1:36.474Brian Graham
125.6Brian Graham
36.711Brian Graham
34.537Brian Graham
24.803Brian Graham
Citation F1600
FF
1
1:34.549Miles Crabbe
1:34.876Miles Crabbe
1:35.412Miles Crabbe
125.2Miles Crabbe
35.861Miles Crabbe
34.169Miles Crabbe
24.134Miles Crabbe
Van Diemen RF02
FF
1
1:35.150Kevin Brumbaugh
1:36.770Kevin Brumbaugh
1:35.150Kevin Brumbaugh
129.5Kevin Brumbaugh
36.763Kevin Brumbaugh
33.720Kevin Brumbaugh
24.546Kevin Brumbaugh
Spectrum 014H
FF
1
1:37.862Sam Lockwood
1:37.862Sam Lockwood
1:38.186Sam Lockwood
122.9Sam Lockwood
37.748Sam Lockwood
34.842Sam Lockwood
24.845Sam Lockwood
Swift DB-3
FF
1
1:41.600Dan Carney
1:52.195Dan Carney
1:41.600Dan Carney
114.0Dan Carney
41.271Dan Carney
36.720Dan Carney
27.511Dan Carney
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
Rule changes between these events
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta 2023-03-10 to 2024-03-08
FC USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC
cars addedUSF2000 Van Diemen with Mazda MZR LF-DE 2.0L added as spec line car in FC; removed from FX.
As printed in Fastrack
RM 23-07, USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC, GCR section 9.1.1.B.1, add a new section and re-letter the following sections accordingly: "c. The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine is added as a "spec line" car in Formula Continental. Additional "spec line" cars are disfavored, and Balance of Performance (BoP) adjustments to keep "spec line" cars competitive with cars that meet the class formula are likewise disfavored." In FC, GCR section 9.1.1.B.11, add the following: "The only permitted engines are: a. The Ford 2 liter single overhead camshaft "NE" series engine or the 1971-74 Pinto/Capri 2 liter single overhead camshaft
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engine. The specifications are contained in B.15. b. The Ford Zetec ZX3 2 liter dual overhead camshaft engine. The specifications are contained in B.16. c. The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below." In FC, GCR section 9.1.1.B, add the following: In FX, GCR section 9.1.1.J.B, change as follows and renumber the remaining lines accordingly: "3. USF2000 (tube frame) – Shall comply with FRP F2000 Technical Specifications (2018) 4. Pro Formula F2000 (tube frame) – Engine must be prepared to current FC rules." In FX Table 1, remove the USF2000 Tube Frame and Pro Formula F2000 Tube Frame spec lines in their entirety. Spec Line Cars Table
A specification table follows in the original; it is not shown here.
wordingFC tire marking rule clarified: four dry and wet tires for Regionals, eight each for Runoffs; damaged tire replacement procedures revised.
As printed in Fastrack
In FC, GCR section 9.1.1.B.10.h, change as follows: "FC shall be is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super Tour events; eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This rule shall be is effective beginning with the first (1st) qualifying session of the event. Marked tires are not required for testing or practice. It is the competitor's responsibility to ensure that the tires are declared, marked, and logged by Tech in advance of the tire(s) being used in a qualifying session or race. Failure to participate on marked tires will result in a penalty. 1. Use of an undeclared tire shall automatically result in all times being disallowed in that session or finishing position in that race.
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2. If a tire is damaged during a qualifying session or a race, the competitor may replace the damaged tire with a used tire upon approval by the Chief Steward without loss of time or finishing position. Second or subsequent damaged tires may similarly be replaced upon approval by the Chief Steward, however but such shall will result in the loss of grid position in the subsequent race or session; the competitor shall will start at the back of the grid. Replacement of a damaged tire with a new tire upon approval by the Chief Steward will result in loss of grid position in the subsequent race or session."
engineF600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional.
As printed in Fastrack
In Cars and Equipment, GCR section 9.3.33.B.2, add the following: "(Effective 1/1/2024) A red taillight meeting FIA Standard 8874-2019, Technical List No. 76, is required on all Formula (open wheel) and Sports Racing cars." In Appendix F. Technical Glossary, Minimum Weight, change as follows: "Minimum Weight: – Weight specified with driver, exactly as they come off the race circuit, at the conclusion of any race or qualifying session." In FA Table 1, Spec Line E notes, add the following: "Any BD series iron or alloy cylinder block and alternate crankshaft permitted."
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In FC, GCR section 9.1.1.B.11.c, change as follows: "The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below."" In F600, GCR section 9.1.1.D.14, add the following: "Rotax Model 494, Model 493, and Model 593 must use a single expansion chamber and must be equipped with a pull starter; an electric starter may be added." In P1, GCR section 9.1.8.B.J.2, add the following: "Where a flat plate intake restrictor, restricted venturi, or Single Inlet Restrictor (SIR) is required, all intake air for each cylinder or the entire fuel-air mixture, if prepared before this point, must pass through the restrictor."
wordingFF Honda Fit gains Fast Forward FF800-100 oversize piston ring pack option.
As printed in Fastrack
In FF, GCR section 9.1.1.B.14.e.3.a, add the following: "The standard ring pack, PN 13011-RB1-004 (Riken) or 13011-RB1-006 (Nippon), or the oversize ring pack, PN 13021-RB7-Z01 (Riken), or 13021-RB7-Z02 (Nippon), or FF800-100 (Fast Forward), may be used."
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2024-03-08 to 2025-03-07
cars addedFC adds F2000 Metrik ZF2 with Ford Zetec engine and four-piston Brembo calipers as spec-line car.
As printed in Fastrack
In FC Table FC Charts, add the following: In FC, GCR section 9.1.1.B.1.c, change as follows: "The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine and the F2000 Metrik ZF2 car equipped with 4-piston calipers is are added as a "spec line" cars in Formula Continental. Additional "spec line" cars are disfavored, and Balance of Performance (BoP) adjustments to keep "spec line" cars competitive with cars that meet the class formula are likewise disfavored." FC Charts Car Engine Wheel Width
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(in) ± .060 Aero Transmission Weight Notes
A specification table follows in the original; it is not shown here.
wordingFF VTEC activation valve must function; EGR blanking plate rule clarified with Fast Forward part numbers.
As printed in Fastrack
In FF, GCR section 9.1.1.B.14.r.1, change as follows: "All emission control devices must be removed and blocked off by the blanking plate provided by HPD or Fast Forward as noted below, except for the VTEC activation valve. The VTEC activation valve must be retained; and it must be functioning. No modifications are permitted. a. EGR Plate: Fast Forward PN: FF200-301. b. EGR Port Cover: Fast Forward PN: FF200-302."
slowerFC tire limit reduced to four dry and four wet for Regional/Major/Super Tour, eight for Runoffs.
As printed in Fastrack
In FC, GCR section 9.1.1.B.10.h, change as follows: "(Effective 11/1/2024) FC is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super Tour events; eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This is effective beginning with the first (1st) qualifying session of the event. Marked tires are not required for The tire limit does not apply to testing or practice. It is the competitor's responsibility to ensure that the tires are declared, marked, and logged by Tech immediately upon conclusion of the first qualifying session, as provided in the event supplemental regulations, or per the instructions of the Race Director or Chief Steward. in advance of the tire(s) being used in a qualifying session or race. Failure to participate on marked Use of tires in excess of the number allowed will result in a penalty. Failure to participate on declared/marked/logged tires after the time
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prescribed for the same may result in a penalty. If a tire is damaged during a qualifying session or a race, the competitor may replace the damaged tire with a used tire upon approval by the Race Director or Chief Steward without loss of time or finishing position. Second or subsequent damaged tires may similarly be replaced upon approval by the Race Director or Chief Steward, but such will result in the loss of grid position in the subsequent race or session; the competitor will start at the back of the grid. Replacement of a damaged tire with a new tire upon approval by the Race Director or Chief Steward will result in loss of grid position in the subsequent race or session; the competitor will start at the back of the grid."
fasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.
As printed in Fastrack
In FF, GCR section 9.1.1.B.20.A.3, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight." In FC, GCR section 9.1.1.B.20.B.4, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
fasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.
As printed in Fastrack
In FF, GCR section 9.1.1.B.20.A.3, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight." In FC, GCR section 9.1.1.B.20.B.4, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
wordingFF Honda Fit allows Fast Forward 0.25mm oversize pistons PN FF800-110 as alternative; piston diameter spec clarified to 2.8835 inches.
As printed in Fastrack
In FF, GCR section 9.1.1.B.14.e.1, change as follows: "Honda Fit OEM standard size pistons, PN: 13010-RB1-000, or Honda Fit OEM 0.25mm oversize pistons, PN: 13020-RB7-Z00, or Fast Forward 0.25mm oversize pistons, PN: FF800-110, may be used." In GCR section 9.1.1.B.14.e.2, change as follows: "a. Maximum standard piston diameter, measured at a point 16mm from the bottom of the skirt: 73.240mm (2.8834 2.8835 inches). b. Centerline of wrist pin to crown maximum: 26.21mm (1.032 inches). c. Maximum overall height from skirt to crown edge: 47.80mm (1.882 inches).
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d. Minimum weight: 198.0 grams (6.984 ounces). e. Minimum weight of piston pin: 66 grams (2.25 ounces). f. Combined minimum weight of piston, piston pin and connecting rod: 543.5 grams (18.85 ounces). g. Combined minimum weight of piston, wrist pin, and circlips: 267 grams (9.418 ounces). h. Centerline of wrist pin to crown edge: 26.289mm (1.035 inches). i. Ring groove widths: Top ring groove: 1.003mm (0.0395 inches). Middle ring groove: 1.016mm (0.0400 inches). Oil ring groove: 1.981mm (0.0780 inches). j. Ring groove distance from wrist pin center to bottom of groove: Top ring groove: 19.63mm (0.7730 inches). Middle ring groove: 15.29mm (0.6020 inches). Oil ring groove: 10.91mm (0.4295 inches)."
FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change
fasterFF allows older cars with rocker arm or outboard suspension to use bias ply slicks or VFF tires instead of radials.
As printed in Fastrack
In FF, GCR section 9.1.1.B.10.e, change as follows: "Formula F shall be limited to the following tires (front tires may not be used as rears): Dries: Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13 Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13 Wets: Front - Hoosier Wet or W3 Radial 44421 185/60R13 Rear - Hoosier Wet or W3 Radial 44426 205/60R13
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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at least one chassis end may use the following tires: Dries: Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick Wets: Radial wets listed above or Front - Hoosier 44165 135/545-13 VFF Rear - Hoosier 44170 165/580-13 VFF Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."
Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2025-03-07 to 2026-03-06
tyres & wheelsFF adds rocker arm and outboard suspension cars optional bias ply and VFF tires; removes front-as-rear rule, adds mixing restrictions.
As printed in Fastrack
In FF, GCR section 9.1.1.B.10.e, change as follows: "Formula F shall be limited to the following tires (front tires may not be used as rears): Dries: Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13 Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13 Wets: Front - Hoosier Wet or W3 Radial 44421 185/60R13 Rear - Hoosier Wet or W3 Radial 44426 205/60R13
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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at least one chassis end may use the following tires: Dries: Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick or Hoosier 44165 135/545-13 VFF Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick or Hoosier 44170 165/580-13 VFF Wets: Radial wets or VFF tires listed above or Front - Hoosier 44165 135/545-13 VFF Rear - Hoosier 44170 165/580-13 VFF Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."
wordingFC USF2000 Tube Frame may use Hewland LD200 4-speed H-pattern as alternative to Hewland JL-200 5-speed sequential.
As printed in Fastrack
In FC Charts table, USF2000 Tube Frame spec line, add the following to the Notes: "Cars originally built with the Hewland LD200 4-speed H-pattern may use that transmission as an alternative to the Hewland JL- 200 5-speed sequential transmission."
FF Formula F Alternative Tire Rule Proposed Clarifications
wordingFF clarifies alternative tire eligibility for cars homologated 1989 or earlier with rocker arm or outboard suspension on all four corners.
As printed in Fastrack
In FF, GCR section 9.1.1.B.10.e, change as follows: "Alternatively, Formula F cars with rocker arm suspension (e.g., 1987-90 Reynard, Swift DB1,) and/or outboard suspension on at least one chassis end homologated in 1989 or earlier with any combination of rocker arm or outboard suspension on all four corners (e.g., 1987 – 1990 Reynard, Swift DB1) may use the following alternative tires. Note: This rule is intended to allow older cars with the described suspension design to use the alternative tires. It is not to be exploited by modifying cars with push-rods or pull-rods to meet the above requirements or by modifying either end of older cars to push- or pull-rod suspension to be eligible to run the alternative tires. Cars that were homologated in 1989 or earlier with push- or pull-rod suspension on no more than two corners may seek approval to run the alternative tire by utilizing the compliance process outlined in GCR section 8.1.4."