The XpressTRX with Balloon Beach Wheels can adjust from 3.25" to 16" wide. This allows it to fit nearly all scupper style kayaks. The padded uprights protect the hull from abrasion and firmly hold the kayak in place during transport. With a maximum load rating of 250 lb (113 kg), this cart can handle most sit-on-top recreational boats with gear. Constructed of tough marine grade aluminum and finished with a silver anodized surface for long term dependable service. Features include adjustable mark-proof rubber padding, corrosion resistant hardware. Each cart also includes low pressure 12" x 7" Balloon Beach Wheels that provide effortless transport over soft sandy terrain. With the integrated push button wheel release system, the need for wheel retainer clips is eliminated. Includes a low pressure air pump for convenient tire maintenance. Product workmanship and material performance is included with our Lifetime Limited Warranty.