Rear Unibody HD Diff Lock 8011 Body The built-in tread flex means

The built-in tread flex means you can run harder compounds for longer wear and still have good traction when you need it

the small cap screw and o-ring

meaning performance oriented enthusiasts can take advantage of the light weight

optimized for durability and long wear characteristics

Fender extensions (4)/ 3x8 flat-head screws (24) (requires #8080 narrow inner fenders)

Rear Unibody HD Diff Lock 8011 Body The built-in tread flex meansUnibody Super Heavy Duty Rear Differential Lock, for Traxxas UDR TUDR125 Hot Racing optional super heavy duty solid billet steel rear differential (diff) locker (spool) for the 1 7 th scale UDR Replaces the factory plastic metal differential locker setup . If you crawl, this is the upgrade to get. Features: CNC machined solid billet steel Compatible with the front or rear differentials Replaces stock Diff locker for extreme durability Black oxide