Tires
Updated 4/1/24
XR Super Series
Tire Rules may be adjusted at any time for any reason and will be properly communicated though text, email, and social media.
- LF: Any Late Model Tire (Hoosier or American Racer).
- RF, LR, RR: Hoosier NLMT 2, NLMT 3, NLMT 4, American Racer 44, 48, Pro3/56, Pro 4. All American Racers must be stamped SPEC.
- No Limit.
- Can Mix Brands.
Additional Info:
- Grooving, Siping, Drilling of tires are allowed.
- Only approved tires will be permitted for use in competition.
- Chemical alterations, vulcanizing, tire softening, defacing, and/or altering the face of the tire lettering and/or tire stamping will not be permitted.
- Tires may be inspected at any time.
Extensive Tire Testing will be conducted at every event.
XR Events Tire Sample & Lab Testing Process
- Teams must be ready to take tire samples at any time during the race night.
- Tire is marked for inspection by XR Events Official.
- XR Events Official confirms marked tire upon notifying the team of the sample.
- Member of team removes marked tire from car.
- Member of team utilizes teams equipment to remove samples as instructed.
- Up to (5) samples will be taken per marked tire. Samples will be approximately one (1”) inch and taken from anywhere indicated by an XR Events Official.
- As samples are removed the team member will place them inside a vial that an XR Events Official will be holding. Only one sample per vial. Team member will than screw lid onto vial. Seal tape will then be applied to vialed.
- All sample data and photos of each sample are entered into an electronic database. Each sample is digitally signed by an XR Events Official, team member, and witness.
- Sealed vial will then be placed inside of the evidence bag. Once placed inside, the evidence bag is sealed. Evidence bag is then marked with the following: (Indicator “Sample #1-5”, Date Code, Tire Compound, Date of Event,).
- Simultaneously, Sample #1 and #2 is sent to Blue Ridge Labs and Sample #3 is sent to ADRL for analysis.
- Sample #4 is retained by the Series if additional testing is needed.
- If sampled tires are found to not confirm to manufacturers submitted benchmark they are deemed illegal. Driver and/or car owner will be notified of results, and in writing if tire sample(s) do not match factory benchmark.
- All tests are deemed final when received from Blue Ridge Labs and ARDL.
- Test results will be posted to xrsuperseries.com upon completion of all tests.
- All test results are final and can not be appealed.