The Thunderbolt is one of the most technically advanced crank designs on the market. Due to continued advancements in the legendary 41-Thermal® processing and heat-treatment system, fatigue life has been increased by a massive margin.

Features

• Proven 41-Thermal® processed 4130 chromoly
• Legendary lifetime replacement warranty
• Laboratory tested and team proven
• Traditional sprocket interface
• Updated open-ended spindle cap
• New wedge cluster band with greater flexibility
• Never-Wobble™ crank arm and spindle interface guarantee

Specs

• RHD specific or LHD specific
• 160mm, 165mm, 170mm and 175mm lengths
• 22mm Spindle
• 1 lb. 11.8 oz. (788g)
• US Pat. Nos. 7,267,030