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Shock absorbers, or shocks, are the suspension components that allow the wheels to keep as much
contact as possible with the track surface. The XRAY NT1 has fully-independent front and rear
suspension, meaning that the suspension at each corner of the car (front left, front right, rear left, rear
right) moves and may be adjusted independently of the others. As such, there is a shock absorber at
each corner of the car.
Damping, mounting position, spring tension, and spring preload are all characteristics that determine
how the shock performs.
Spring rate is determined by the characteristics of the spring itself, and NOT by the amount of preload placed on the spring by the preload collars.
Characteristics such as wire material, wire thickness, and other factors determine spring rate. Spring rate is usually expressed as a “spring weight”
number that indicates how much weight (or force) is required to compress the spring by a specifi c amount. A spring with a higher “spring weight”
number is considered “harder” since it will be more diffi cult to compress than a spring with a lower “spring weight” number.
XRAY shock springs are color-coded so that all springs of a specifi c “spring weight” have the same external colour. Note that spring colours are NOT
standardized; an XRAY silver spring will not have the same spring tension as a silver spring from another manufacturer.
Stiffer
springs
• Makes the car more responsive.
• Car reacts faster to steering inputs.
• Stiff springs are suited for tight, high-traction tracks that aren’t too bumpy.
• Usually when you stiffen all of the springs, you lose a small amount of steering, and reduce chassis roll.
Softer
springs
• Makes the car feel as if it has a little more traction in low grip conditions.
• Better for bumpy and very large and open tracks.
• Springs that are too soft make the car feel sluggish and slow, allowing more chassis roll.
Stiffer front
springs
• Increases mid-corner and corner-exit understeer.
• Increases steering under braking.
• Increases the car’s responsiveness, but makes it more “nervous”.
Softer front
springs
• Makes the car have more steering, especially mid-corner and at corner exit.
• Front springs that are too soft can make the car understeer under braking.
Stiffer rear
springs
• Makes the car have less rear traction, but more steering mid-corner and at corner exit. This is especially apparent in long,
high-speed corners.
Softer rear
springs
• Makes the car have more rear side traction mid-corner, through bumpy sections, and while accelerating (forward traction).
SHOCK ABSORBERS
SHOCK ABSORBERS
EFFECTS OF SPRING RATE SELECTION
SHOCK SPRING RATE
Adjust shock spring rate by substituting different shock springs on each pair of front or rear shocks.
IMPORTANT:
Each pair of front shocks or rear shocks must use the same shock springs on left and right sides.
308386
XRAY SPRING-SET D=1.7 (25 LB) DARK-BLUE - REAR (4)
308387
XRAY SPRING-SET D=1.8 (30 LB) LIGHT-PURPLE - REAR (4)
308396
XRAY SPRING-SET D=1.7 (28 LB) VIOLET - REAR (4)
308397
XRAY SPRING-SET D=1.8 (33 LB) PURPLE - REAR (4)
338183
XRAY SPRING D=1.7 (25 LB) DARK-BLUE - FRONT (2)
338185
XRAY SPRING D=1.7 (28 LB) VIOLET - FRONT (2)
338186
XRAY SPRING D=1.8 (30 LB) LIGHT-PURPLE - FRONT (2)
338187
XRAY SPRING D=1.8 (33 LB) PURPLE - FRONT (2)
Shock spring rate determines how much the spring resists
compression, which is commonly referred to as the
“hardness” of the spring. Different spring rates determine
how much of the car’s weight is transferred to the wheel
relative to the other shocks. Spring rate also infl uences
the speed at which a shock rebounds after compression.
Spring rate selection depends on whether the track is fast
or slow, or has high or low grip.
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