Easton EC90 Carbon Crank

O2GearShop.com (Spring 2009)

At 558 grams, it packs the highest stiffness-to-weight ratio of any carbon crank currently available, and has also tested at over 500,000 cycles in a fatigue test-five times longer than the nearest competitor. That's unheard of in a carbon crank.

Features:

• Carbon Nanotubes make Easton's proprietary CNTTM composite tougher than standard high modulus carbon, making it the ideal material for a superlight, super strong crank.
• Chainrings 53/39t standard, Ceramic Teflon coating, shift pins and ramps
• Construction CNTTM composite crank arms and spider 7050 aluminum pedal inserts 24mm CrMo steel spindle
• Dual Core Composite (DCCTM) construction allows incredibly precise control of the mold process and also creates a stiffness-boosting spine inside both crank arms
• Hybrid Composite Molding (HCMTM) combines multiple composite manufacturing techniques to optimize the resin to fiber ratio, adding strength and minimizing weight.
• Length 170, 172.5, 175mm
• TaperwallTM puts the material where it's needed for strength and stiffness. Wall thicknesses are thinner in the center sections to save weight. The transitions between thick and thin sections are seamless to distribute stress evenly along the length of the structure.
• Technology CNTTM, DCCTM, HCMTM, TaperWallTM
• Threading Italian or English
• Warranty Five years
• Weight 95 grams
• Weights 558 grams (crank arms, chainrings and CrMo spindle)