Easton | EC90 ALX Crank Arms

Cut the weight. Keep the power.

The Easton EC90 ALX Crank Arms are Easton’s lightest crank arms, built for riders who want efficient power transfer across road, all-road, and gravel.

Their unidirectional carbon construction uses a new layup, lightweight aluminum inserts, and Easton’s slimmer Lite-Spline interface to remove unnecessary material without compromising strength. The redesigned shape also increases heel clearance for a cleaner pedal stroke.

A stainless steel wear plate protects the areas most commonly affected by heel rub. Combined with Easton’s modular CINCH system, the EC90 ALX can be configured for a wide range of 1x and 2x road or gravel drivetrains.

Important Compatibility Note

These are crank arms only. Spindle, chainring, bottom bracket, and spacer kit are not included.

A compatible Easton Lite-Spline CINCH 30mm spindle is required:

• LS Standard Spindle: Shimano Road and SRAM 1x or 2x drivetrains
• LS Wide Spindle: Shimano Gravel drivetrains, including GRX and CUES

Key Features

• Easton’s Lightest Crank Arms
A redesigned carbon structure and Lite-Spline interface reduce weight while maintaining stiffness and durability.

• Unidirectional Carbon Construction
The carbon body is bonded to lightweight aluminum pedal and spindle inserts for direct, efficient power transfer.

• All-Road Wear Plate
A stainless steel plate protects the areas most exposed to heel rub and long-term surface wear.

• Increased Heel Clearance
The slimmer arm profile gives the rider more space around the crank during each pedal stroke.

• Modular CINCH System
Supports compatible 1x and 2x chainring configurations for road, all-road, and gravel setups.

• Multiple Crank Lengths
Available in 160mm, 165mm, and 170mm lengths to suit different riders and bike fits.

Technical Specifications

• Category
Carbon Crank Arms

• Discipline
Road / All-Road / Gravel

• Crank Arm Material
Unidirectional carbon fiber

• Wear Protection
Stainless steel wear plate

• Inserts
Aluminum pedal and spindle inserts

• Available Crank Lengths
160mm / 165mm / 170mm

• Spindle Interface
Easton Lite-Spline CINCH

• Spindle Diameter
30mm

• Compatible Spindles
LS Standard / LS Wide

• Q-Factor
150mm with LS Standard spindle

• Compatible 2x Chainrings
46/36T / 47/32T / 46/30T AX Gravel

• Compatible 1x Chainrings
SHI 12S: 38T / 40T / 42T / 44T
FLT Top 12S: 36T / 38T / 40T / 42T / 44T

• Reference Weight
329g with LS Standard spindle and 170mm crank arms

• Maximum System Weight
121kg

• Included Components
Left and right EC90 ALX crank arms

• Excluded Components
Spindle, chainring, bottom bracket, and spacer kit

Less weight beneath every pedal stroke, with nothing held back when the road turns rough.