Underground Manufacturing 1-Hole 7075 Aluminum Simple Replacement Spool

7075 Aluminum replacement spools/pulleys for the venerable Petzl Simple descender. 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 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. Each spool weighs approximately 51 g (1.8 oz). We also make 316 stainless steel (smoother ride and much more durable than stock) as well as 2-hole upper spools for the older simple (in stainless or aluminum). These spools are in use all over the world and are hand made in the USA.

It is, of course, your responsibility to familiarize yourself with your new spool(s) (and any other changes to your vertical setup) in a controlled setting prior to real world use. Replicate all conceivable scenarios you might encounter. Make sure your setup works to your satisfaction, your life depends on it! If you aren’t happy with the performance of your spool(s) after this step, you may return them.

All spools are tested for fit and function prior to shipping, please excuse any resulting minor cosmetic imperfections that may result. Serial numbers may be laser engraved or stamped.