All current Crown stand-up rider counterbalance and straddle lift trucks have compartments that are 57.5 inches from the floor in the area behind the operator. Third corner posts are also standard on current models. See Product Reference SF14745.

Third post kits are available for Crown stand-up rider models RC 3000 and RR/RD 5000/5200. See Product Information Bulletin 07-07-01. 

Crown has discontinued used truck sales and rentals of older stand up rider models RC, RR/RD/RS, RR/RD 3000 and RR/RD 3500. For end users still operating these models, Crown continues to offer both third post and 4th corner extension kits. See Product Information Bulletin 07-07-02.