Includes:

(1) Rear axle assembly with 48T spur gear (0.4M)
(1) Compound gear 43/13 (0.4M)
(1) Bearing shim
 

Notes - We have made a change to the axle to get the left rear tire away from the left rear shock a bit more.  The new axle will come with a shim where when you use the fanged bearings on the left rear axle tube you will need to put this shim behind the bearing to get the side to side spacing correct.  Link on the Instruction Sheet link below for details.