Durable, lightweight crank and 38T chainring combination designed for straightforward upgrades and reliable everyday riding. Key specifications BCD (bolt circle diameter): 104 mm (outer circle), 64 mm (inner circle). Use these measurements to confirm bolt pattern fit. Teeth: 38T chainring for a balanced gear ratio that supports both acceleration and climbing. Crank arm length: 170 mm. Crank-related holes distance: 74 mm (hole-to-hole spacing for mounting). Feature: Durable and lightweight construction for long service life and responsive pedaling. Compatibility: Suitable for Mountain bike (MTB), Road bike, Folding bike, and BMX. Why this product helps Easy compatibility check: Clear BCD and hole spacing specs let you confirm fit before buying, reducing installation issues. Versatile gearing: The 38T ring provides a practical middle-ground gear that works well for mixed use—commuting, recreational road rides, and off-road trail sections. Durable, lightweight performance: Designed to withstand regular use while minimizing added weight, improving acceleration and reducing rider fatigue. Practical applications Urban commuting: Install on a folding bike or road bike to get a reliable, efficient gear for stop-and-go city riding and mixed-surface routes. Trail and light off-road riding: Use on mountain bikes (MTB) for better cadence control on climbs and technical sections. BMX or multi-purpose builds: Fit to versatile frames where a durable, compact drivetrain component is preferred. Installation notes Verify BCD (104 mm outer / 64 mm inner), crank arm length (170 mm), and the 74 mm hole spacing match your crankset and bottom bracket before purchase. Intended as a direct drivetrain component; ensure compatible chain size and mounting hardware are used. What to expect A dependable, lightweight crank and 38T chainring solution that balances durability and performance for a range of bike types and riding styles.