Set, and is intended for use with the Serpent 733. This set includes one 20 tooth pulley, and one 21 tooth pulley. These pulleys are perfectly true running, and offer low wear. ...
The Serpent SRX 51 Tooth Aluminum Ball Differential ...
Pulley is an optional upgrade compatible with the full range of Spyder 1/10 off road cars equipped with the SER500186 rear ball differential, or any car equipped with the SER500167 51 tooth diff ...