The 39T option provides slightly taller gearing

The UP maintains a fleet of historic locomotives and rolling stock for use at public day events and special business trips

This complete four-shock set replaces the front and rear shocks and can be filled with your preferred shock oil

Protect the belly of your Desert Racer with this genuine Traxxas chassis skidplate

Traxxas 9476X M/T Rear Tires w/ Black Chrome Wheels/Foam Insert (2) : Drag Slash

Kyosho OTW124B Rear Shock Spring Set(S/M/H /2p/OPTIMA) DBXL Parts The 39T option provides slightlyKyosho OTW124B Rear Shock Spring Set(S M H 2p OPTIMA) The Kyosho OTW124B is a rear shock spring set including soft, medium, and hard rates, sold as a set of two, offered as a genuine Kyosho replacement part for the Optima. Having a range of spring rates on hand lets owners fine tune rear end feel to suit different track conditions. Genuine Kyosho part, SKU OTW124B Rear shock spring set Soft, medium, and hard rates included Fits the Kyosho Optima