The Sumo III features a 24mm bore with included adapters compatible with 22mm and 19mm crank spindles
The optimized rim shape and wide internal profile promote efficient airflow
and performance on high-altitude climbs
and efficient power transfer on technical trails
Recommended usage is two applications per frame
Singing Rock Pulley Extra Plus CE - Durable Climbing Gear with Advanced Performance Features_Touch Screen Compatible The Sumo III features aSinging Rock Pulley Extra Plus CE, EN Certified High Performance Lightweight Mechanical Ascender for Vertical Climbing & Rescue Elevate your climbing, Rappelling, and rescue operations with the Singing Rock Pulley Extra Plus CE, EN Certified. Designed for professional climbers, rescue teams, and adventure enthusiasts, this high quality pulley combines innovative engineering, durable materials, and reliable performance to meet the highest safety