Traxxas 8042 GTS Shock Springs for the TRX-4 Scale and Trail Crawler feature are 0.22 (yellow rate) and sold as a pair. Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your users manual for exact parts listings.