#103807 - RACING SPRING SET (BLITZ/REAR/4 PAIRS)
BLITZ/Racing springs allow fine suspension tuning for better handling.
HPI Racing now offers a Racing Spring Set that gives BLITZ and Mini-Trophy trucks a wide variety of tuning choices to dial in the handling of their trucks to track conditions for faster lap times. This set features 4 pairs of gray rear springs that are color coded for easy identification:
- Pink (One step softer than stock)
- White (Stock BLITZ rear spring)
- Yellow (One step stiffer than stock)
- Red (Two steps stiffer than stock)
#103807 BLITZ RACING SPRING SET (REAR/4 PAIRS) Also available is a Racing Spring Set for the front shocks: #103348 RACING SPRING SET (BLITZ/FRONT/4 PAIRS)
Discontinued Unfortunately, the part that you require is an older part which has been discontinued and therefore no longer available from HPI Racing. There may still be old stock available, please check with your local distributor for local retailer and stock information.

#86915 SHOCK SPRING 13x57x1.1mm 13coils (2.7lb/SILVER)
#86912 SHOCK SPRING 13x57x1.1mm 10coils (3.6lb/RED)
#86914 SHOCK SPRING 13x57x1.1mm 12coils (3.0lb/PINK)