Quad Grip Crank Extenders come in three options, 1″ 2″ or 3″ extenders and all are (9/16″) Threading
Crank Width Extensions: (Sold In Pairs) Hollowed lightweight aluminum, available in 3 sizes. Black powder coating standard. The perfect solution for handcyclists who have rubbing during crank rotation on thighs, or just want a wider diameter between both hand crank pedals.
1" Extension, 2" Extension, 3" Extension