41-Thermal 20th Anniversary: Limited Edition Glow in the Dark
To celebrate 20 years of 41-Thermal, Odyssey and Sunday have teamed up to offer this special limited edition Glow In The Dark kit (parts sold separately). VERY limited quantities are available.
The Thunderbolt+ is our tried and true Thunderbolt cranks, but now it includes a Mid BB and updated graphics!
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.
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