5DEV R-SPEC Trail / Enduro Crank Arms

The 5DEV R-SPEC Trail / Enduro Crank Arms are precision-machined alloy cranks built for aggressive trail and enduro riding, combining 7050 billet aluminium strength with a 5-year warranty for long-term reliability. Made in San Diego, California, they offer multiple length options, SRAM 3-bolt direct mount compatibility, and a fully serviceable design for consistent performance under load. The standout 7050 billet aluminium construction delivers high stiffness with low weight, giving you direct power transfer without excess bulk.

Key Features and Benefits:

• 7050 Billet Aluminium Construction: Machined from high-grade 7050 aluminium billet, these crank arms provide greater tensile strength and fatigue resistance than standard alloy. This increases stiffness under heavy pedalling loads, reduces flex, and ensures long-term durability on demanding trail and enduro terrain.
• Made in San Diego, California: Precision CNC machining and strict quality control ensure tight tolerances across every crank arm. This results in accurate spindle alignment, smoother drivetrain operation, and consistent performance over time.
• Wide Range of Length Options (135mm–170mm): Multiple crank lengths allow you to fine-tune fit, cadence preference, and ground clearance. Shorter lengths improve clearance and control on technical terrain, while longer options maximise leverage for sustained climbing power.
• SRAM 3-Bolt Direct Mount Compatibility: Designed to work with the SRAM 3-bolt direct mount interface, the crank arms allow secure chainring attachment with minimal hardware. This simplifies installation, reduces weight, and ensures a direct, stiff connection for efficient power transfer.
• Self-Extracting Hardware with Chromoly Steel Bolts: Integrated self-extracting hardware allows straightforward removal without specialist tools. Durable chromoly steel crank bolts provide high clamping force and long service life, reducing maintenance issues.
• CNC’d 7075 Alloy Preloader and Included Mounting Hardware: A precision-machined 7075 alloy preloader enables accurate bearing preload adjustment. This maintains smooth crank rotation, limits side play, and supports consistent drivetrain efficiency.

When pushing hard on rough terrain, crank stiffness and durability directly affect power delivery and control. The 7050 billet aluminium arms resist flex under load, so more of your effort drives the bike forward. Accurate machining and secure direct mount chainring support help maintain clean shifting and stable chain retention. The result is reliable performance through repeated impacts, high torque efforts, and long days on demanding trails.

Choose the length that suits your setup and match it with your preferred 5DEV spindle. With proven materials, precision manufacturing, and a 5-year warranty, these crank arms are built to handle serious trail and enduro use. Secure your setup with components designed to perform season after season.