PIT BOARD
PIT BOARD

Knoxville Raceway

Knoxville, IA — 1/2 mile
DIRT OVAL
TRACK SCIENCE · USDA SSURGO
33%CLAY
2%SAND
65%SILT

Udolls · Moderately well drained

Sharpsburg silty clay loam, 2 to 5 percent slopes

Balanced clay substrate — typical Midwest dirt; groove moves out as rubber builds.

High-bank 1/2 mile — add rear stagger vs flat. Sprint/micro +0.5–1"; LM/mod +0.25–0.5".
1/2 mile
SIZE
clay
SURFACE
HIGH
BANKING

High-bank 1/2 mi sprint car cathedral — 410 Nationals.

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