5DEV Crank Spindles

The 5DEV Crank Spindles are precision-machined 7075 aluminium axles designed to fine-tune crank fit, chainline and Q-factor across road, gravel, MTB and fatbike setups. Available in both 29mm and 30mm diameters, with 10 size options from 118mm to 164mm, they deliver accurate spacing and drivetrain alignment for modern frames and standards. This wide size range is a key feature, allowing precise Q-factor tuning without compromise.

Key Features and Benefits:

• 7075 aluminium construction: Machined from high-grade 7075 aluminium, the spindle offers high tensile strength with low weight. This resists flex under load and maintains stiffness during hard efforts, resulting in consistent power transfer and long-term durability.
• 29mm and 30mm diameter options: Offered in two common spindle diameters, these spindles integrate with a broad range of cranksets and bottom bracket standards. This ensures correct bearing interface and smooth rotation, leading to reliable performance across different build platforms.
• Several length options from 118mm to 164mm: The extensive size range supports Road (118mm), Road Wide (122mm), Mountain Boost (130mm), SRAM Wide 55mm Chainline (136mm), SuperBoost+ (139mm), DH (145mm) and Fat bike (164mm) setups. This allows accurate Q-factor and chainline setup, improving drivetrain efficiency and reducing chain wear.
• Dedicated support for multiple chainline standards: Specific lengths are designed to match modern Boost, SuperBoost+ and SRAM Wide chainlines. Correct chainring position improves shifting accuracy and reduces lateral drivetrain stress, resulting in smoother gear changes and longer component life.
• Application coverage across Road, Gravel, MTB and Fat bike: With sizes tailored to narrow road frames through to wide fat bike rear ends, the spindle range adapts to varied frame geometries. This flexibility ensures correct crank stance and clearance, supporting stable pedalling across disciplines.
• Precision-machined tolerances: Tight machining control ensures accurate bearing seating and consistent alignment within the crankset. This reduces unwanted play and friction, delivering smoother rotation and improved system longevity.

Accurate crank spacing and drivetrain alignment are critical for efficient pedalling and consistent shifting. A correctly sized spindle sets the Q-factor and chainline to match the frame and rear hub standard. This reduces side loading on bearings and chainrings, limits drivetrain noise, and maintains predictable shifting under load. With multiple diameter and length options, the 5DEV Crank Spindle range provides the exact fit required for a clean, efficient build.

Select the spindle size that matches your frame and drivetrain standard and complete your crank setup with precise alignment and reliable strength.