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DIFFERENTIAL GEARS
2.1.2
Another tuning option for the differentials is
to change the outer crown or spur gears to
tailor the car to your driving style or track
conditions. Note that overdrive changes
are only done in the front.
EFFECTS OF DIFFERENTIAL GEAR REPLACEMENT
GEAR
WHEN TO USE
FRONT
Larger front gear
(more teeth)
• Using a larger front gear is NOT recommended
Standard
• Standard gear works well on most tracks and conditions
Smaller front gear
(less teeth)
• Recommended for slippery tracks
• Gain more overall steering and makes car easier to drive
• Rear end follows the car around
CENTER
Larger center gear
(more teeth)
• Increases acceleration
• Decreases top speed
• Use on smaller track to get more punch
• Use with a larger clutchbell to get more overall torque
while maintaining the same gear ratio
Standard
• Standard gear works well on most tracks and conditions
Smaller center gear
(less teeth)
• Decreases acceleration, but smoother
• Increases top speed
REAR
Larger rear gear
(more teeth)
• Recommended for slippery tracks
• Underdrives the rear end with the same effect as a
smaller front gear
Standard
• Standard gear works well on most tracks and conditions
Smaller rear gear
(less teeth)
• Using a smaller rear gear is NOT recommended
OPTIONAL DIFFERENTIALS (XRAY ACTIVE DIFF™)
2.1.3
The XRAY Active Differential™ is a high-
performance, adjustable front gear
differential for XRAY 1/8 nitro off-road cars
& truggies. It vastly improves the car’s
speed and handling characteristics. The
special design of the internal components
– using different angled segments – allows
the diff gears to engage on-power to
increase the forward traction and stability
to the buggy, making it faster and easier
to drive.
• High-performance adjustable front Active Differential for improved speed & handling
• Designed for XB8-based models
• Fully-adjustable on- and off-power performance using different internal segments and
gears
• Improves diff action and increases traction
• Easy and consistent steering
SEGMENT
AVAILABLE
WHEN TO USE
The standard 90° segment provides
a very good balance of performance
between on- and off-power. On-power
the diff becomes hard after a brief
delay. Off-power the diff becomes
free after a brief delay.
Recommended for high grip
and/or bumpy tracks.
The optional 120° segment gives
more immediate response both on-
and off-power. On-power the diff
becomes very hard immediately (no
delay). Off-power the diff becomes
free immediately (no delay).
Recommended for slippery
and/or flat tracks.
