The outside-to-outside measurement of the Trailair Rota-Flex 5th Wheel Pin Box, # LC328330 is 12". Please note the linked product review video. view full answer...
The Electric Trailer Brake Assembly # AKEBRK-6L & # AKEBRK-6R are great options for your 2011 Keystone Alpine Fifth Wheel.
These brake assemblies will work with 14-1/2", 15", 16", and 16-1/2" diameter wheels, 5,200lbs, 6,000lbs, 7,000lbs axles, and measures 12" diameter, 2" wide.
These brakes should work great for your 5th wheel as long as the brake assemblies on your current brakes are 12" in diameter and use a 5 bolt mounting pattern then these will work.
I also recommend buying these... view full answer...
The correct Curt Flex Air 5th Wheel Pin Box for a 2021 Keystone Alpine 3910RK is part # LC328492. I confirmed this with Lippert/Curt for you as well. This is a direct bolt-on replacement that will do an excellent job of absorbing road shock and providing a smooth ride. view full answer...
In order to find the correct replacement slide-out seal for a Keystone Apline Fifth Wheel Trailer you'll need to remove the existing and measure its dimensions as well as note the shape. This can then be used to match up a replacement using the list below. The Rubber Top Lip Wiper Seal for RV Slide Out part # SR23VR for example measures 2-1/2" wide and fits a 1/4" thick pinch-weld flange.
Unfortunately, we aren't able to confirm a slide out seal for a recitational vehicle with just the... view full answer...
The SumoSprings Trailer Helper Springs part # SS26MV mount on top of the leaf springs directly above the axle so there should be no interference with the Lippert Center Point by Trailair Air-Ride Suspension Upgrade. view full answer...
The Adco Tyvek All-Climate + Wind RV Cover for 5th Wheel part # 290-34858 is what you need for the 2019 Keystone Alpine 3700FL. The Adco Tyvek All-Climate + Wind RV Cover for 5th Wheel Toy Hauler will fit a variety of fifth wheel styles which is why it says toy hauler but it is a confirmed fit for the Alpine 3700L.
The great thing about the Adco Tyvek covers is the Tyvek top which protects your Alpine from the elements all winter long. Tyvek is the material used to weatherproof structures... view full answer...
Currently we have not had any issues with compatibility between the Hydrastar Electric-Hydraulic Actuator # CAR-HBA16-2 and the factory integrated trailer brake controller on Ram trucks. While we have not tested these on new Ram trucks if there are issues you can simply add the Adapter Module # HBA-CAM which eliminates the brake issues. I typically recommend just having the module installed on the trailer so if for some reason the trailer would need to be towed by a different truck the... view full answer...