Effect of a pushrim-activated power-assist wheelchair on the functional capabilities of persons with tetraplegia - ScienceDirect
Grippoz - cover your wheelchair rims with these covers for better grip. | Wheelchair accessories, Wheelchair, Adaptive design
RibGrips
Amazon.com: 22inch Silicone Wheelchair Push Rim Covers, Non-Slip Wear-Resistant Hand Push Cover, Wheelchair Rim Grips, Wheelchair Rear Wheel Cover for Improve Grip and Traction (Blue, 22in) : Health & Household
Natural-Fit Wheelchair Handrims | Wheelchair Hand Rims