The Thunderbolt is one of the most technically advanced crank designs on the market. Due to continued advancements in Odyssey's 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
22mm Spindle
US Pat. Nos. 7,267,030