http://www.ebay.com/itm/3500-Torsion-Axle-Stub-RV-Trailer-Camper-1750-ea-/350192458071?hash=item518918d957&vxp=mtr#
http://www.randpcarriages.com/ebay/axleparts/1750halfaxle.JPG
Eliminates need for leaf springs.
