Tamiya has released On-Road Tuned Hard Spring Set White under category
Compared with standard counterparts in Item 53163 On-Road Tuned Spring Set (4WD/FWD Touring & Rally Car), these springs are stiffer and provide greater protection at rate. The set contains two each of four various types (soft, moderate, difficult and EX-hard) to facilitate an entire selection of setups. Springs are white with colored markings sent applications for easy recognition.
Compatible Chassis F104*2, F104W*2, F104 PRO II, FF-03, FF-03 PRO, FF-04 EVO, M-07 Concept TA05 Ver.II, TA06, TA06 PRO, TA06 MS, TA07 PRO, TA07 MS*1, TB-03, TB-03 VDS, TB-04, TB-04 PRO, TB-05 PRO, TB Evo.6, TB Evo.6 MS, TB Evo.7, TT-01 Type-E, TT-01 Type-ES, TT-01D Type-E, TT-02, TT-02D, TT-02 Type-S, TT-02RR, XV-01, XV-01T & XV-01 PRO Chassis*1Use with Item 53571 TRF Damper Set (Fluorine Coated).*2Use with Item 53901 TRF Special Damper (F103GT).
*The formal Tamiya R/C Parts Matching List has plenty of details about framework right for Tamiya free and Hop-Up Option parts.