Design Intent

AdvenChair’s design is inspired by Mountain bikes.

The AdvenChair is built for durability and uncommon comfort in the wild.

AdvenChair’s design is inspired by Mountain bikes. (not WheelChairs)

The AdvenChair all-terrain wheelchair is designed by a pro team, including a product development/mechanical engineer, an adaptive technology guru, adaptive sports athletes, mountain bikers (riders and master mechanics), and a licensed aerospace AP mechanic.

Due to readily available, off-the-shelf mountain bike components, coupled with serviceability at bike shops worldwide, regular maintenance and repairs are easy.

AdvenChair uses only premium-grade mountain bike components throughout the design.

Float over the roughest terrain with 27.5” plus wheelsets outfitted with fat 2.8” knobby tires, and the Cushcore inner tire suspension system, allowing the use of low tire pressure (10 to 15 psi).

Learn all about AdvenChair’s 20” BMX front wheelset, 15mm through axles, sealed bearings, durable powder-coated finish and more.

At the heart of Advenchair’s design is a durable, lightweight, and rugged tubular aluminum Frame.

The frame is a rugged design constructed of lightweight 6000 series tubular aluminum with CNC machined axle dropouts. All weldments are subjected to a PWA process to restore mechanical properties after welding.

AdvenChair offers superior handling compared to other off-road chairs.

AdvenChair weighs approximately 55 lbs. in wheelchair mode and approximately 63 lbs. in all-terrain mode. Yet it feels much lighter than this due to its extremely low rolling resistance. We often experience the lead mule asking the driver if they are pushing. The answer we usually get back from the driver is, “No, are you pulling?”

Get outstanding control from driver-operated brake levers and large 180mm rotor disc brakes.

Exceptional ground clearance makes it easy to straddle over rocks, roots and other obstacles that are encountered along the trail.

Mountain Bike-Inspired Design

The AdvenChair design is inspired by mountain bikes (not wheelchairs). That means you can count on rugged durability, easy maintenance, and uncommon comfort in the wild.

  • AdvenChair’s design team features a product development/mechanical engineer, an adaptive technology guru, adaptive sports athletes, mountain bikers (riders as well as master mechanics), and a licensed aerospace AP mechanic.

  • AdvenChair has been thoroughly tested on all types of trails, including a mountain bike training course (see below) throughout Central Oregon and the Pacific Northwest.

  • When in All-Terrain Mode, accompanied by the proper size team, AdvenChair allows you to roll boldly into extremely wild places.

Premium Grade Mountain Bike Components

AdvenChair uses only premium-quality mountain bike components for their durability and ease of maintenance. Maintaining your AdvenChair is very easy if you are somewhat handy with bicycle repair. If not, simply take it into any bike repair shop and they will know how to service it.

AdvenChair uses the following premium mountain bike components:

  •   Stan’s No Tubes Major S1 27.5” plus front wheels sets

  •   Maxxis High Roller II 27.5” X 2.8” tires (main wheels), Maxxis MAXXDADDY 20” X 2.00” (front wheel)

  •   CushCore Pro inner tire suspension system

  •   The Robert Axle Project 15mm lightweight thru-axles

  •   SRAM BB7 MTB brake calipers w/ 180mm rotors

  •   Raceface Chester 35 direct mount stem

  •   Raceface Chester 35 handlebar

  •   ProMax locking brake levers (serve as parking brake as well)

NOTE: Due to the ongoing supply chain issues, AdvenChair reserves the right to substitute components of equivalent specifications.

Rugged, Lightweight Tubular Aluminum Frame

No matter how you cut it, the frame is what sets AdvenChair apart from the competition.

  • Only AdvenChair uses 6000 series aluminum tubing combined with CNC machined 6061 T6 aluminum axle dropouts. Welded together, they create a rugged, lightweight frame that’s virtually bombproof.

  • Durable two-stage powder coating features a polyester TGIC base coat followed by a star-bright clear coat.

  • Super strong and lightweight 15mm thru-axles engage into double-axle dropouts. This offers superior strength and rigidity over traditional wheelchairs that use quick release axles that only engage on the inboard side of the wheel (overhung axle design) which do not hold the wheel to the frame rigidly. Also, the 15mm thru-axles allow the main wheelsets to be removed/replaced in just a couple of minutes with no hassles.

  • Nesting features machined onto the axle dropouts create a self-centering mechanism to allow for easy wheel alignment and axle insertion.

  • The wheel cages offer protection to the wheelsets from boulders and brush that are often encountered when traversing next to rock outcrops.

  • The wheel cages also offer push, pull, and lift points to allow the team to navigate through the variety of hazards that are encountered off-road.

  • The frame is designed for a maximum rider weight of 250 lbs. Designed using SolidWorks 3D CAD modeling alongside ANSYS Discovery to perform with finite element analysis (FEA) modeling during the design process. A 750 lb. load is applied to the frame structure during FEA modeling to ensure an ample factor of safety (3 times the rated load) for rugged trail use.

Superior Handling: Wheels, Suspension, Brakes, Low Rolling Resistance and Ground Clearance

  • AdvenChair’s main wheels use massive 27.5”+ wheelsets coupled with fat 2.8” tubeless tires and the CUSHCORE inner tire suspension system. Sealed bearing sets in the wheels allow for reduced rolling resistance and reduced maintenance intervals. The large-diameter wheels offer a greater approach angle. Allowing the chair to roll over rocks, boulders, and roots with ease. The CUSHCORE inner tire suspension system combined with the use of lower tire pressures (10 - 15 psi) further absorb the bumps creating a very smooth ride for the rider. This combination yields a large contact point where the tires meet the ground and allows AdvenChair to easily roll through snow, sand and mud.

  • AdvenChair uses massive 180mm brake rotors coupled with Avid Juicy BB7 Mountain brake calipers offering exceptional brake modulation. Steering along the trail is super easy. A slight touch of the right brake will help steer to the right, while a touch of the left brake will veer to the left. Mechanical brakes offer an advantage over hydraulic brakes for our application as the brake pads do not creep closed when the main wheel sets are removed for transport.

  • Sufficient ground clearance under the footrest is critical for any true all-terrain wheelchair. That’s why AdvenChair offers the most available ground clearance of any all-terrain wheelchair ranging from 6-1/4” up to 9-1/2” depending on the foot rest adjustment. AdvenChair easily clears obstacles like rocks, roots, and ruts that other all-terrain wheelchairs would scrape the foot rest on.

  • A steering damper controls the reaction of the front wheel when encountering obstacles and turns.

  • The front wheel is a large 20” BMX wheelset coupled with a fat 2” tire and tube that is mounted on a trailing link spring-biased suspension system. Sealed bearing sets in the wheel allow for reduced rolling resistance and reduced maintenance intervals. The large 20” front wheel offers a greater approach angle for rolling over bumps, boulders, and roots while the trailing link suspension reduces peak impact forces. The use of low tires pressures (10 to 15 psi) combined with different available spring rates allows you to cushion the ride even further if you choose.

The CUSHCORE inner tire suspension system in the video below, combined with the use of lower tire pressures (10 - 15 psi) further absorb the bumps creating a very smooth ride for the rider. This combination yields a large contact point where the tires meet the ground and allows AdvenChair to easily roll through snow, sand, and mud.