Already running an Arvika 3-bike rack on your RV and need room for one more? The AVKKIT4 Fourth Bike Kit is the official Arvika expansion component that mounts to the rear of your existing rack and provides a secure, dedicated position for a fourth bike. No improvising, no aftermarket workarounds -- this kit is purpose-built to integrate directly with compatible Arvika rack models and uses the same hardware system as the original rack.
The Arvika AVKKIT4 is not a universal adapter -- it is a factory-matched expansion kit designed specifically for Arvika ladder-mount and hitch-style 3-bike racks. It attaches at the rear position of the rack frame, extending the rack's capacity from three bikes to four without modifying the existing structure or voiding compatibility.
The kit supports tire widths up to 2 inches, covering the vast majority of road, hybrid, and mountain bike tire sizes commonly transported by RV owners. Two included wheel straps keep the fourth bike's tires secured against the gutter rail, while the 3-inch arm provides the lateral support needed to hold the bike frame in position during travel.
Engineered specifically for Arvika 3-bike rack models. No drilling, cutting, or improvised adapters required for compatible racks.
Accommodates standard road, hybrid, and most mountain bike tires. Check your tire sidewall before ordering if running wider rubber.
Arrives with the gutter rail, 3-inch support arm, and two wheel straps -- everything needed to add the fourth bike position.
Installs at the rearmost position of the rack, keeping the bike load balanced and the rack geometry consistent with factory design.
The AVKKIT4 ships complete with all hardware needed for the fourth bike position. Nothing additional is required from the base rack beyond a compatible model.
The AVKKIT4 is confirmed compatible with the following Arvika 3-bike rack models. Verify your rack model number before purchasing -- this kit does not fit 2-bike rack configurations or non-Arvika racks.
This kit is ideal for families or groups traveling by RV who started with a 3-bike rack and need to add capacity for one more rider. It is also a practical choice for RV rental operators or anyone who purchased a 3-bike Arvika rack and later needed to scale up without replacing the entire rack system.