Pro-Line Boats PRO-Fusion SC 4x4, Instruction Manual

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PRO-LINE RACING  /   PRO-FUSION SC 4×4  /  INSTRUCTION MANUAL

FRONT CASTER

This is the angle of the front hub from vertical when viewed from 
the side of the PRO-Fusion SC 4×4. It is adjusted by swapping or 
changing the combination of the 1mm and 2mm spacers on the 
front upper hinge pin. (see circled items above)

The PRO-Fusion SC 4×4 has 10° of front kick-up with adjustable 
front caster angle from +10° to +20°. The stock setting is +15° of 
caster.

Less caster angle typically provides more aggressive steering and 
does not handle bumps as well. More caster angle is easier to 
drive and handles bumps better.

WHEELBASE

The wheelbase on the PRO-Fusion SC 4×4 is adjustable up to 
4mm by moving the spacers next to the rear hub carriers. The 
stock setting is in the middle. A longer wheelbase is typically 
more stable, while a shorter wheelbase will turn sharper.

CAMBER

This is the angle of the tires as they lean in towards the center of 
the vehicle.

The front camber angle is adjustable by using the included 
0.75mm spacers under the lower pivot balls. Each spacer 
increases camber by 2°.

The rear camber link turnbuckles are adjustable just like many  
race vehicles. Shortening this turnbuckle will increase camber.

Increased front camber will increase steering. Increased camber 
overall generally provides more traction and stability while 
cornering.

Tuning Tips