2025 Drop Rule for Points:

As in past years, the Champion of the Schaeffer’s Oil Spring Nationals Series will receive an additional $10,053 following the tour finale on Sunday, May 25 at Duck River Raceway Park in Wheel, Tennessee. There are fourteen (14) dates on the tour schedule in 2025 and as long as there are at least ten (10) completed events, drivers will drop their worst TWO (2) races. If only nine (9) or less events are completed due to inclement weather, there will be NO dropped races at the end of the miniseries.

The winner of the inaugural Coltman Farms Cup will receive an extra $4,000, along with a premier, unique, state-of-the-art trophy that Coltman Farms Racing is hopeful everyone will want in their collection. The runner-up in the chase for the Coltman Farms Cup will receive an extra $2,000. Drivers must compete in at least half of the events to be eligible.

2025 Tire Rule:

Our tire rule for all Schaeffer's Oil Spring Nationals Series shows in 2025 is as follows:

Hoosier Racing Tire: NLMT 2, 3, 4
American Racer Tire: 44, 48, Pro3/56, Pro4

If you have any questions concerning the 2025 tire rule, please contact Ray Cook at 828-360-5353.

Weight Rules:

2350# - Open Motor
2300# - Steel Block/Aluminum Head - Spec Motor Only (8" spoiler allowed, 12" sides)
2250# - CT525 Motor (8" spoiler allowed)
2250# - All Steel Motor or Crate Motor (8" spoiler allowed, 12" sides)

* 1# per lap burnoff + 5 lbs. in B-Mains and Feature

Body Rules:

In 2025, the Schaeffer's Oil Spring Nationals Series will follow the rulebook and droop rule adopted by both the Lucas Oil Late Model Dirt Series and the World of Outlaws Case Construction Late Model Series. Spring Nationals Series officials reserve the right to change and/or alter rules and procedures at any time. ALL OFFICIAL DECISIONS ARE FINAL!

* Full 2025 Lucas Oil Late Model Dirt Series / World of Outlaws Late Model Series / Schaeffer's Oil Spring Nationals Series Rulebook

Rear Travel Limiter (Droop Rule) - As taken from the Rulebook linked above.
a. A vertical travel limiting chain must be installed on the left rear of the car from the left rear axle housing to the frame. The travel limiting chain must attach to a bearing type mount or a clamp mounted bracket with the chain mounted to the top (12 o’clock) of the left rear axle tube, between the birdcage and the edge of the left rear bell of the axle housing, and to the left rear frame directly above the chain mount on the rear axle. Travel limiting chains must be installed so that when taunted they are as close to vertical as possible. One (1) compliance device may be used. The compliance device must not be more than one inch (1") thick (without a load applied) and remain completely open and visible. Compliance devices can be rubber or any like material but must not be installed in any type of canister. Springs, spring loaded, and/or pneumatic devices will not be permitted. No tapered, beveled, or roller skate type of compliance rubber will be permitted. Compliance devices must be solid material, same diameter top to bottom, not hollowed or drilled to soften the material.

b. The travel limiting chain including the compliance rubber must be installed so that when the car is jacked up from the rear the chain assembly is tight (no slack). The travel limiting chain is subject to inspection at any time during the event at the discretion of the officials. Cars will be jacked up on the under-slung frame rail one inch (1”) in front of the rear axle tube, between the center of the rear axle and the panhard bar mount. The left rear under-slung rail must be located between the left rear birdcage and the edge of the left rear axle housing bell. Cars will be jacked up until a forty-thousandths of an inch (.040”) shim will slide between the left rear tire and the ground. Once the car is jacked up as described a vertical measurement will be taken from the ground to the top trailing edge of the rear deck bar, six inches (6”) inboard of the left rear quarter panel outer edge. The measurement must not exceed fifty-one inches (51”).

c. All droop limiter assemblies must support the unsprung mass of the rear-end. The stretched value of the droop limiter assembly may be no more than three-quarters of an inch (3/4”) at 1,200 lbs. The procedure: preload 100 lbs. zero (0) distance, pull to a value of 1,200 lbs.