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The 4S springs
2mm increments
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complicated circuits combining more aggressive jumps and extremely high-speed corners
T4'20/T4'21 ULP Graphite Shock Tower Rear 3.0mm Infinity The 4S springsThe ULP (Ultra Low Profile) front shock tower redesigned to work with the T420 bulkheads and upper clamps and to match the geometry of the longer suspension arms. Machined from premium grade 3. 0mm graphite, the shock towers are super lightweight and very compact. Part no. 302960
