Bonzai M900 - Text Review

The M900 features a smooth-welded 6061 aluminium alloy frame with a tapered head tube. Its geometry is offered in M and L sizes, covering riders approximately 165–175cm and 175–185cm respectively. The frame is also dropper-post ready, giving riders an upgrade path for more demanding trail use. Internal cable routing helps maintain a clean overall appearance. The modern hardtail design balances stability with responsive handling. Overall, it has a purposeful MTB construction rather than a basic recreational-bike layout.

The Shimano Alivio M3100 2×9 drivetrain is one of the M900's strongest features. Its 36-22T crankset works with an 11-36T Shimano cassette to provide 18 usable gears. The lower gearing helps when climbing while the higher ratios remain useful on faster sections. Shimano Alivio shifting is well suited to recreational trail and cross-country riding. The KMC Z-9 chain completes the drivetrain package. For riders moving beyond basic entry-level MTBs, this setup provides a noticeable step up in versatility.

Comfort comes primarily from the SR Suntour XCM30 fork and the bike's 29-inch wheels. The fork provides 100mm of travel and hydraulic lockout, allowing it to absorb bumps while remaining efficient on smoother roads. The large wheels help roll over small obstacles with less effort. The lightweight saddle and ergonomic cockpit contribute to the overall riding position. The M900's hardtail construction also transfers pedalling effort efficiently. For mixed city and trail use, this combination offers a practical balance of comfort and efficiency.

Tektro HD-M275 hydraulic disc brakes provide the M900 with confident braking performance. The bike uses a 180mm front rotor and a 160mm rear rotor for controlled stopping. Its 760mm flat alloy handlebar provides a broad steering platform for trail control. The 60mm alloy stem helps maintain a responsive MTB cockpit. Together, these components give the bike stable steering and predictable braking. This setup is particularly useful when descending or riding on loose and uneven surfaces.

The M900 uses 29-inch wheels with Kenda Slant Six 29×2.2-inch tyres. These tyres offer a useful balance between grip and rolling efficiency for mixed trail conditions. The double-wall aluminium rims add strength while keeping the wheel package practical for MTB use. Sealed-bearing MY607BQ hubs are used at the front and rear. A lightweight saddle completes the seating setup. Overall, the wheel package is designed around stability, traction and everyday durability.