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.
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.
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