Mike McLelland
New member
My unit came with a Lippert Trailair Roto-flex pinbox and Lippert has told me the name changed to a Curt Roto-flex sku 807712. I asked them for suitable upgrades and was told I should consider a Curt Airride sku 807710 (has an airbag and shock absorber) or a Curt Flex-Air sku 807711 which has an airbag, a shock absorber and a roto-flex pivoting head). The pinbox I have has a roto-flex pivoting head but no air bag nor shock absorber and has served me well but does result in some chucking and bucking depending upon road conditions. I sent Lippert a copy of the frame tag as the sku number was no longer visible on my pinbox and they identified it from the frame tag and the picture they sent me for 807712 matches what I have. I've visited with my RV tech and he's not familiar with either but thinks the 807711 would be preferable as the distance between the bolt holes on it are almost the same as the 807712 that came with my rig. I found one review on etrailer.com on 807711 from someone who made the switch and said he didn't like the upgrade and was putting his old pinbox back on his unit. I'm wondering if there are any Alliance owners out there that have made the change to either 807710 or 807711 and whether they were pleased, disappointed or neutral on the changeout. If I knew for sure that it would improve the tow haul experience then I'd probably make the switch but don't want to find myself regretting the change after making the switch. As a side note, the tow vehicle is a 2021 Dodge Ram 1 ton dually and all of the pinbox's I've mentioned in the above narrative are 21,000 lb rated items. Your responses will be appreciated as I'm somewhat hesitant to make the change as what I have is the known and "ain't broke yet". Thanks, Mike