Forum: HoseHeads Sprint Car General Forum (go)
Moderators: dirtonly  /  dmantx  /  hosehead

Can anyone shed some light on this? Which tracks/series/sanctions require you to run the same RR tire all evening after qualifying or heat races?

Knoxville, same RR for TT, heat and Feature for all classes.

WoO, same RR for TT, heat and Dash

allstars, same rr qual ,heat , and a main

Knoxville 410s have to run the same rr all night unless it's damaged or you had to run the b main, 360s can change theirs.

From the 2015 Knoxville Raceway Rulebook

TIRE RULE 410 CLASS

One Right Rear Tire All Night, Any unapproved tire change between events will result in the car going to the rear of the next event. Cars competing in the B and C mains may use different tires. Cars transferring from the B main to the A main must use the tire they qualified on to keep their transfer position. Procedural rules regarding tire changes and other information will also be posted at all events

and may be amended at any time. No tire preps or tire softeners allowed.

Hoosier Racing Tires on all four corners

Fronts: 85/8.0-15 D12, D15, D20

Left Rears: 15.0/90-15 H12, 15.0/92-15 H12, H15, 15.0/94-15 H12, H15,15.0/96-15 H12, H15

Right Rears: 105/16.0-15 H15, H20, Medium

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Right rear wheels may be changed as long as tire is the same.

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Knoxville officials will mark tires after time trials. Any tampering with the stamp will result in disqualification.

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In the event track conditions warrant, and or special races, Knoxville officials may waive the tire rule for the evening’s program.

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Non-repairable punctured, sliced and/or out-of-round marked right rear tires may be changed to a used right rear tire of the same size and compound (with no signs of being new) and remarked. The damaged right rear tire will be confiscated. Teams will receive a onetime exemption (Knoxville regular season events only) for a tire change after a qualifying event. The new tire must be of the same compound. Knoxville Officials must mark and document this one time exemption.

additional TIRE RULE-360's

Right Rear Hoosier Racing Tire, stamped Medium or Hard 105 X 16. No tire preps or tire softeners allowed. Left rear Tires, H series Left Rear only - Hoosier H12, H15 Fronts: 85/8.0-15 D12, D15, D20.

Tire Rule - 305's

Tire Rule- Same as Knoxville 360 and 410 classes)

They talked about changing the 360 tire rule to match the 410s this year but it didn't go through, so 360s will still be able to change theirs throughout the night.

In some cases it is a good thing however there are tracks that are very abrasive and one tire will not make it all night. 

Curious how much this saves a race team .

It saves the well funded ones at least $200 a night but the biggest advantage may go to the underfunded teams.  Some can't afford to put new tires on every race and it gives them a better chance to compete.

So say team A an underfunded team races 20 times a year and through cycling tires they can get through a season by using only 13 RR tires by using used tires for heat races and putting on a new RR when starting in the first 3 or 4 rows of a feature. if a team went to a race track with a used RR tire and was required to use that tire the whole night, they are putting to chance that the tire wont hold up the rest of the night. While team B buys 20 new RR tires with a new one on every night doesnt have to chance the tire being used up as much as team A with a used tire to start the night. 

Team A spends $2600 on RR's to just "Play Ball"

Team B spends $4000 on RR's to be as competitive with anyone else with a RR tire rule

Im not advocating one way or the other, just putting it out there to look at.

If a tire rule saves money for the race teams just think how much could they save if they only had to have 1 particular type tire to run anywhere they went. No ascs medium or H series just the same tire for every sanctioning body.