6" Front/Rear Caster Wheel Assembly for the Drive Medical R800 Rollator (9502FR80000) TaoTao Freelander 4x4 and some people actually have

and some people actually have two complete sets

these hub motor/drive wheel units allow lightweight power in a small package

This is the genuine Drive Medical factory wheel assembly

The D5870 replaces any standard 24 volt 32 Ah gel battery including the following battery models:

6" Front/Rear Caster Wheel Assembly for the Drive Medical R800 Rollator (9502FR80000) TaoTao Freelander 4x4 and some people actually haveThe 6" front rear caster wheel assembly for the Drive Medical R800 rollator is the same for all four caster positions. This means that the same caster can go on the front or the back; on the left side or the right. Note: This item is serial number specific. Drive Medical states that this wheel is only compatible with R800 rollators having a serial number 2F1909000001 or after. Drive Medical: 9502FR80000