Metal geared servos are recommended for these applications

Hitec HPP-21 Digital Servo Programmer

Team Losi now offers a selection of front and rear coil-over springs for their Mini-T® oil-filled shocks

Plastic construction with preinstalled steel ball bearing Assembled and ready to install

Standard length shank Number of teeth laser etched on shaft

HPI 100950 Shock Shaft 3.5X90mm (4pcs) Savage X Savage Flux Super 5SC Flux 1/16 Slash Parts Metal geared servos are recommendedHPI 100950 Shock Shaft 3. 5X90mm (4pcs) Savage X Savage Flux Super 5SC Flux These are the Shock Shafts for use on the HPI Racing 1 8 Savage Flux HP Brushless Truck RTR FEATURES: Steel construction INCLUDES: Four Shock Shafts REQUIRES: Installation in the Big Bore Shocks SPECS: Length: 90mm (3. 5") Diameter: 3. 5mm (0. 14") This Part Fits the following kits parts: BIG BORE SPORT SHOCK SET Savage Flux HP RTR 2. 4GHz RTR Super 5SC Flux RTR Savage X 4. 6