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Helex / Spring Shim - Team Driven

Helex / Spring Shim - Team Driven




The helix / spring shim will help maintain peak RPM when riding at extreme elevations or climbing in steep conditions. This shim spaces the hub of the clutch in 0.070" which raises the spring pre-load and rate by 8 to 10 pounds. It also shortens the length of the initial (steeper) angle on a compound helix (i.e. 58/38.46 with a shim would become a 58/38.40) This improves backshift characteristics at high elevations in very steep conditions. It is especially beneficial when using long, aggressive tracks.