Jon Muir did the first ever unassisted crossing of Australia, solo from Port Augusta to Burketown, 2500km and 128 Days. The cart was made with ATV wheels.
Robert Twigger in his book “Lost Oasis” describes some Sahara desert explorations with a 4 wheeled cart.
Ripley Davenport in his Walking Across Mongolia did use a rickshaw style cart with 4 monuntain bike wheels.
Todd Carmichael made several attempts to cross the Death Valley with a cart equipped with Wheeleez PU wheels.
Lucas Trihey did cross the Simpson Desert with a richshaw style cart with super fat mountain bike tires. He also orginzes trips in the australian desert with the carts.
Chris Bray and Clark Carter did cross Victoria Island using first 2 wheeled kayaks and later a super cart (divisible in 2 separate carts) with 4 tractor inner tubes protected by kevlar fabric and carbon fiber rims.
Louise-Philippe Loncke did cross the Simpson Desert with a Rickshaw style cart.
Karl Bushby: around the world and the coast to coast of the United States.
Rick Ridgeway, Galen Rowell, Conrad Anker and Jimmy Chin did cross the Tibet’s Chan Tang Plateau with rickshaws that had interchangable wheels: Wheeleez PU wheels and mountain bike wheels.
Ron Dunham and his walking cart: we didn’t find more infos about him on the internet.
David Lim: crossing of the Salar de Uyuni salt desert in Bolivia.
Carla Perrotti, also crossing of the Salar de Uyuni desert.
Tim Moss: a page on several carts for crossing deserts.
COMMERCIAL CARTS, TRAILERS & SLEDS
Monowalker: very nice cart tha can be transformed into a bike trailer, hicking trailer, backpack, travel trailer and a shopping trailer.
Radical design: builds the bike trailer Cyclone (that can be also a walking tow bag) and the walking trailer Wheelie with different configurations.
Carrix: a compact single wheel cart made in Switzerland.
Banpacker: another nice cart that can be at the same time a 2 wheeled cart and a bike trailer.