The biggest advantage of RACING SPEC is its remote reservoir. With a separate oil tank, bump (compression) and rebound (extension) damping can be tuned exactly as you want. It holds about twice the oil of conventional dampers, so suspension characteristics barely change even during long sessions or in midsummer heat. It also offers a wide 32-click adjustment range, which lets you control chassis attitude while drifting, minimizing the effect of rough throttle inputs and track bumps — especially useful in tandem runs. Gas pressure can be set lower for a more linear-moving suspension, with smoother initial damping that makes setup easier, and it is less likely to skip over big bumps. Rebound stroke has also been increased by 20mm compared with our D1SPEC to widen setup freedom. Urethane bushings are used at the shock mounts, and the front shocks are rigid inverted units.
Compatible chassis codes
Chassis code
CS14/S14/S15
Specifications / Front
Inverted/Upright
Inverted
Spring Free Length
180mm
Spring rate
8Kgf/mm
Spring type
Linear
Inner diameter
62Ф
Upper mount
Pillow ball
Length adjustment method
Fully threaded
Damping adjustment method
Dial type / 2-way independent adjustment of rebound and compression. The dial on the upper mount adjusts compression damping, and the dial on the bracket adjusts rebound damping.
Damping adjustment
30-step
Specifications / Rear
Inverted / conventional
Conventional
Free length
200mm
Spring rate
6Kgf/mm
Spring type
Linear
Inner diameter
62Ф
Upper mount
Pillow ball
Length adjustment method
Fully threaded
Damping adjustment method
Dial type / 2-way independent adjustment of rebound and compression. The dial on the upper mount adjusts rebound damping, and the dial on the cylinder adjusts compression damping.
