The Thunderbolt is one of the most technically advanced crank designs on the market. Due to continued advancements in our legendary 41-Thermal® processing and heat-treatment system, fatigue life has been increased by a massive margin.
KEY 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
BB sold separately (post Dec 2020)
SPECS
Lengths: 165mm, 170mm, and 175mm Drive Side: RHD or LHD Spindle: 22mm Weight: 1 lb. 11.8 oz. (788g) US Pat. No. 7,267,030
