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The 4454 Aerodynamicist Carbon Disc benefits from the further trickle-down effect of HUNT's in-house engineering team's Aerodynamicist rim profiles
in an area of bicycle aerodynamics that has been hotly contested and innovated within for over 15 years
The super-fast SONdelux is the result of this innovative thinking
UD carbon fibre spokes with incredibly high strength
Size: 700x26c
END-6903-LLU-CN Bearing | Stainless Steel Enduro Sustain Phase 1 The 4454 Aerodynamicist Carbon DiscA single stainless steel enduro END 6903 LLU CN bearing. If you are purchasing this bearing to replace your existing freehub bearing, please refer to the freehub product page to see its exact location in the freehub.