This is the Traxxas TRX-4 All Terrain Traxx, Complete Set Front and Rear

Features:
Virtually unstoppable traction on practically any terrain including mud, sand, and even snow
Fully-assembled for installation in just minutes
Oil-filled coilover dampers to control rotational movement
Suspended road wheels allow treads to conform to irregular surfaces
Traxx adds over 16 mm of ground clearance compared to 1.9” wheels and tires and over 8 mm more than 2.2" wheels
Functions similar to portal weights, carrying the bulk of the weight down low for improved stability
Effectively lengthens the wheelbase while increasing the breakover angle which adds stability while ascending steep slopes.
Specially designed one-piece rubber treads resist de-tracking
Drastically improves ground clearance and approach angles
Designed for all-weather fun
Sealed bearings on drive wheels
Low-maintenance self-lubricating bushings on guide wheels
Longer rear Traxx drive units for steep climbing stability
Re-usable molded foam storage box
Fits all TRX-4 models

Includes:

(4) Traxx

Requires:
TRX4 Vehicle

This product is compatible with the following Model(s): Traxxas TRX-4