Values in parentheses are measured vs. Hoosier advertised approximate dimensions.

 

SUGGESTED STARTING POINTS FOR SETUP AND ALIGNMENT

Camber

The VFF tires perform best with only slight negative camber:

Front: - 0.25 degrees to -0.5 degrees

Rear:    0 degrees to -0.5 degrees

 

Caster

Same as with bias slicks: +3 degrees to +5 degrees

 

Toe

Front:  1/16” to 1/8” toe out

Rear:  1/16” to 1/8” toe in

 

Tire Pressure

• Tire pressures are a matter of driver preference and “feel.”  The rear sidewalls are not very stiff and move sideways when turning in, then take a set.  The front and rear tires develop maximum grip at slip angles greater than the bias slicks.

Cold:  F 12  R 14 psi

Hot:    F 16  R 17 psi (maximum)

• Racing with rear tire pressure above 18 - 19 psi causes “crowning”, center tire wear and a greasy feeling.

• For rain / wet conditions, set pressure to “hot” settings.

 

Ride Height Change vs. Hoosier Bias Slicks

• Actual measured circumferences indicate the Front VFF tire is taller by almost an inch in diameter than the Hoosier bias slick, requiring lowering the front ride height.

• The rear VFF tire is slightly taller, therefore little or no ride height change required.

 

Gear Ratio Change vs. Hoosier Bias Slicks

• Since the rear VFF tire is only slightly taller. Most tracks will not require a gear change.

 

For reference - Specifications Hoosier R60A Compound Bias Slicks:

 

 

 

 

 

 

 

Values in parentheses are measured vs. Hoosier advertised approximate dimensions.

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09.28.2023

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