Developed to quickly determine the condition of Shimano 8/9 speed HG or IG cassette sprockets.
Indicates when cogs are on the verge of being too worn out, preventing chain skipping
Ski, climb, hike, camp, and summit with expert-curated, guide-tested outdoor gear from top brands. Shop online or visit us in Seattle for friendly advice!
Not valid on sale items, Garmin products, or Totem Cams. Other exclusions may apply
© 2026, Ascent Outdoors
