Hobbywing quicrun brushed 555 13t motor features specialized carbon brushed for extended life zero-cogging torque design excellent efficiency outstanding response and control adjustable mechanical timing of the motor modular design for easy service and cleaning specifications model: quicrun brushed 540 pn: 30404316 slot: 5 turns: 13t (rpm@7. 4v): 14000 input voltage: 12. 6v diameter/ length(mm): ?=36mm(1. 42in) l=58. 5mm(2. 30in) shaft diameter/ length (mm): ?=3. 175mm(0. 125in) l=16. 5mm(0. 65in) applications: 1/10 crawler / short course truck / monster truck weight: 193g (hw30404316)