Replacement Spools for the Petzl Simple Descender

Stainless steel replacement spools/pulleys for the venerable Petzl Simple descender. Made of 316 stainless steel, these replacement spools last 6-10x as long as the stock 6061 Aluminum spools. They offer reduced friction and a much smoother ride. We recommend replacing only the bottom spool, which sees the most wear—replacing both is unnecessary. The reduced friction of these spools is really what makes them worth the extra cost—they are quite smooth and easy to control with less of the ‘grabbiness’ of the aluminum versions. This is especially helpful for lighter weight cavers who struggle with the Simple on long pitches or fat/muddy ropes.

7075 Aluminum replacement spools/pulleys for the venerable Petzl Simple descender. These spools replace the upper or lower position spools on newer Simples that use symmetrical single hole spools. Made of 7075 aluminum, these replacement spools last about 2x as long as the stock 6061 Aluminum spools. They offer similar friction characteristics to the stock Petzl spools. These make a great upper position spool to pair with our 316 stainless steel spools. You can, of course, run these spools in both positions to maintain the light weight of the Simple and/or to preserve the original friction characteristics.

It is, of course, your responsibility to familiarize yourself with them (and any other changes to your vertical setup) in a controlled setting prior to real world use. All spools are tested for fit and function prior to shipping, please excuse any resulting minor cosmetic imperfections that may result.