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REAR ROLL CENTER
Rear roll center affects
on- and off-throttle situations in
all cornering stages.
Rear Roll Center Effect
Lower
• Increases on-throttle grip.
• Decreases weight transfer at rear of car, but increases grip.
• Increases grip, decreases rear tire wear.
• Increases chassis roll.
• Use to avoid traction rolling at corner entry (increases rear grip).
• Better on low-traction tracks.
Higher
• Decreases on-throttle steering.
• Increases weight transfer at front of car, but decreases grip.
• Increases car’s responsiveness.
• Decreases chassis roll.
• Use in high-grip conditions to avoid traction rolling in mid-corner and corner exit.
• Better on tracks with quick direction changes (chicanes).
ADJUSTING ROLL CENTER
Adjusting the front or rear roll center on the NT1 is the best way to change mid-corner grip at either end of the car, as well as to balance out the
overall grip between the front and rear.
• Use the same settings on the left and right sides of the car.
• Each matched pair of roll center inserts (at ends of a pin) must have the same position.
• Changing roll center settings impacts several other settings on the car, such as downstops, camber, and ride height.
When changing front or rear roll center, re-check your other settings.
ADJUSTING FRONT ROLL CENTER
Adjust front roll center by changing the front upper pivot pin inserts.
ADJUSTING REAR ROLL CENTER
Rear roll center on the XRAY NT1 can be adjusted in two manners:
• LARGE ADJUSTMENTS: Change the rear lower pivot pin inserts.
• FINE TUNING: Change the inner and outer mounting positions of the
rear camber link
LARGE REAR ROLL CENTER ADJUSTMENTS
Make large adjustment to rear roll center by changing the rear lower
pivot pin inserts.
Effect on Front Roll Center Lowest Highest
Front Upper Insert
Position
+1.5 +0.5 -0.5 -1.5
Effect on Rear Roll Center Lowest Highest
Rear Lower Insert
Position
-1.5 -0.5 +0.5 +1.5
ROLL CENTER
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