Truck Series qualifying, race procedures explained for Knoxville

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For the last time this season, the NASCAR Camping World Truck Series will tear up the dirt when it returns to Knoxville Raceway on Saturday, June 18 for the second annual Clean Harbors 150 presented by Premier Chevy Dealers.

Similar to the dirt layout of Bristol Motor Speedway, the qualifying heats will determine the starting line-up for the 150-lap main event. The first of four rounds is scheduled to begin at 7 p.m. ET, followed by the headliner at 9 p.m. ET (FS1, MRN, SiriusXM NASCAR Radio).

Although the incessant rain last year did not allow the rounds to be held in Bristol to prepare the Truck Series riders at Knoxville, this was not a problem in April. The qualifying format will go the same way this weekend on the Iowa half mile:

Starting training format

  • Four qualifying heats of 15 laps each will take place, only the green flag laps counting. The overtime rule will not be in effect, but the pass and bypass procedures will remain.
  • Qualifying round assignments and starting positions will be determined by a draw, conducted in order of team owners’ points standings. A total of 38 trucks are on the entry list in Knoxville, which would mean two 10-truck and two nine-truck fields for the rounds. The main event field is limited to 36 trucks, so unless there is a late entry, two trucks will not qualify.
  • The starting line-up will be determined by a formula that weights the finishing position plus the number of positions gained in each round. Drivers who finish first in their heats earn 10 points, second place earns nine, third place earns eight, and so on. Additionally, pilots earn one waypoint for each position gained in their heat; there are no point deductions or “negative points” for drivers who lose positions in their heats. Point totals determine starting positions. These points are only used to determine the starting line-up and do not count towards the Season Championship standings.
  • Ties in these point totals will be broken by the team owners’ current points.

Pit stop format

  • Teams will not be permitted to change tires or add fuel except during breaks between stages.
  • Teams are required to stop during one of two stage breaks. There will be no racing on or off pit road, using a controlled pit stop procedure similar to the format of previous track events. Non-competitive pit stops must be completed within a time limit (3 minutes).

Stages and schedule

  • The series will hold two practice sessions on Friday. The first is scheduled for 50 minutes starting at 7:05 p.m. ET (no TV). The final workout is 25 minutes long and takes place at 9:02 p.m. ET (no TV).
  • Saturday’s main event stages will finish at laps 40 and 90 with 150 laps scheduled to cover the full distance.

Notes on tires

Goodyear will have Truck Series teams using the same tire configuration used at Bristol. However, the tire codes are different from those used at Knoxville in 2021 (left side – D-3054, right side – D-3056). The changes were made to help the tread compound be more heat and wear resistant. The tires will be the 15-inch Dirt Bias Ply instead of radials, which will help wrap up any irregularities in the dirt surface. The tread will have a block pattern instead of the “normal” slicks to help grab and expel dirt. The right side tire size (88.50 inches) will be similar to what teams are used to running, but the left side tire (85.79 inches) is significantly shorter to create more offset between the left and right sides.

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