WUZEI MTB Carbon Fiber Crank 165 170 175mm Mountain Bicycle Crankset 24mm Ti AL-7075 Axle 3 Bolt Bike Sprocket for Shimano

AL7075 Aluminum – Best for value & stiffness

-Made from aerospace-grade aluminum alloy
-Very light, but titanium is about 10–15% lighter
-Very stiff – power transfer is instant and direct
-Best for sprinting, climbing, and high-wattage riding
-Good corrosion resistance for normal use (avoid long-term sweat /rain)
-Lower cost – best value for most riders

Titanium – Best for weight & corrosion resistance

-About 10–15% lighter than AL7075
-Slightly less stiff, but more flexible and comfortable
-Reduces road vibration – good for long-distance /endurance riding
-Almost rust-proof – works great in rain, coastal areas, or humid climates
-Needs almost no maintenance
-Higher cost due to expensive material and difficult machining

Feature

1. Lightweight & High-Strength Carbon Fiber Construction
-Crafted from high-grade carbon fiber, the crank arms deliver exceptional lightness without compromising structural integrity.
-Outperforms traditional steel and aluminum cranks in torsional rigidity, impact resistance, and corrosion resistance.
-Maintains consistent performance even under high-intensity stress, eliminating flex for more responsive power transfer.

2. Optional Premium Spindle Materials
-Titanium Alloy Spindle (High-End Version): Boasts an unbeatable strength-to-weight ratio, matching the strength of chromoly steel while significantly reducing weight. Delivers instant, powerful acceleration with every pedal stroke.
-7075 Aluminum Alloy Spindle (Standard Version): Lightweight, durable, and reliable, offering a cost-effective performance upgrade for daily trail riding. (24mm diameter for wide bottom bracket compatibility)

3.Monocoque/One-Piece Molding Technology
-Seamless one-piece construction eliminates weak points found in bonded or assembled designs.
-Improves torsional rigidity by 20-30% compared to conventional cranks, resulting in zero power loss during hard sprints or steep climbs.
-Built to last over 100,000km without performance degradation, far outlasting typical aluminum cranks that develop micro-cracks after ~50,000km.

4. Zero Power Loss 3-Bolt Direct Mount System
-The stable triangular 3-bolt mounting design eliminates installation gaps, ensuring every watt of your pedaling force is directly transferred to the drivetrain.
-Evenly distributed preload prevents screw self-loosening, eliminating annoying creaks, noise, and play during long, high-vibration rides.
-Delivers quicker starts, sharper acceleration, and a more direct connection between you and the trail.

5. Adjustable Preload Locking Ring
-Features a precision-adjustable preload mechanism, compatible with both drive-side and non-drive-side configurations.
-Accommodates variations in frame bottom bracket shell width and axle tolerances, allowing for fine-tuned adjustments to eliminate any unwanted play.
-Maintains rock-solid stability under high-torque pedaling, ensuring maximum efficiency and no power bleed.

6. Durable Gloss Black Finish
-Sleek, high-gloss black coating not only looks premium but also protects the carbon fiber from scratches and UV damage.
-Maintains a clean, race-ready look even after years of hard riding in muddy, dusty conditions.

Note

If you choose the "without BB" option, your package will not include the bottom bracket

Titanium Alloy Axle

AL-7075 Axle