Swing Arm 2025 for Mid-drive Motor

Engineered for Mid-Drive Motor Excellence

This swing arm is specifically designed to seamlessly integrate with mid-drive motors, including the Bafang BBSHD 1000W, BBS02B 750W, and BBS01B 500W – 250W models. Fits to: Q76 (all years), Q140 (all years), Q80, Q155.

Crafted from high-strength Cr-Mo steel, this swing arm boasts an impressive tensile strength of 1200 N / mm², ensuring exceptional durability. Its wall thickness, ranging from 1 – 2 mm, strikes the perfect balance between lightweight design and rugged performance.

Whether you’re tackling off-road adventures or demanding terrain, the Swing Arm 2025 is engineered to deliver robust support for powerful mid-drive motors, making it a reliable choice for cycling enthusiasts who demand top-tier performance and durability.

Reinforced at critical points, it is built for high-power runs and rugged off-road terrain, ensuring reliability and performance.

The through axle dropout design, with D12 mm hole on the left side and M12x1,5 thread on the right side allows easy hub axle installation.

The swing arm features two rear shock mounting points to accommodate different rider needs. The higher mounting point is designed for heavier riders, positioning the pivot point further away to provide greater resistance to movement. The lower mounting point is ideal for lighter riders. You can experiment with the shock position to find the setup that works best for you.

The pivot point is supported by precise ball bearings, ensuring smooth, resistance-free motion.

Additionally, the swing arm includes a brake caliper bracket compatible with 203 mm disc rotors. For brake setup, you can use brake caliper bracket spacers to achieve the correct spacing. These spacers are sold separately and are not included in the kit.

The swing arm features built-in zip tie hooks, providing a convenient way to secure brake lines and derailleur cables for a clean and organised setup.

It can also accommodate mudguards with a straightforward bolt-on installation. Visit the shop to explore available options.

Motor Compatibility:

Compatible with the Bafang BBSHD 1000W drives (with 160 Nm M615 motor), this setup also works seamlessly with the Bafang BBS02B 750W and BBS01B 500W–250W drives. The M615 motor is exceptionally powerful and efficient, with a rated power of 750W or 1000W and a maximum torque of 160 Nm, making it an ideal choice for the Q80 or Q155 frame kits.

Recommendations Based on Tire Width:

Wider Tires (>2,5”): Use a frame with a 100 mm BB shell width and a 200 mm dropout on the swing-arm for optimal chain line (Q80 or Q155 frame kit).

Narrower Tires (<2,5”): Opt for frame with a 83 mm BB shell width and a 150 mm dropout on the swing arm (Q80 or Q155 frame kit).

2025 Swing arm Features:

• Enhanced Stability: 25 mm longer design for improved stability.
• The 2025 model is approximately 200 g lighter than its predecessor.
• 2025 Swing arm can now fit wider tires, over 100 mm in the narrowest point. See the drawing for details.
• Reinforced Mounting Points: Rear shock mounting brackets are reinforced to withstand demanding off-road conditions.
• Versatile rear hub width: Standard 150 mm dropout width, with optional 200 mm dropout.
• Adjustable seat height: multiple shock absorber mounting points on the frame allow for different seat heights for different rider sizes (from 1.6 m to over 2m tall).
• Increased Chain Space: Raised bottom design provides clearance for larger chain rings, with a maximum suggested size of 46T for single chain-ring or Overdrive system.

• Fully backward compatible with older Qulbix® models (Q76, Q140), ensuring effortless upgrades.

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