NDakter Bike U Lock with 18mm Hardened Shackle and 6 ft Cable — Heavy-Duty Double-Deadbolt Security

The NDakter Heavy Duty U Lock is a reinforced bicycle and e-bike security system featuring an 18 mm hardened steel shackle plus a 6 ft steel cable for flexible, high-strength protection.

Whether you park at a busy campus, outside a café, or leave an e-scooter overnight, this U lock is built to increase the time and effort required for theft. Constructed from hardened steel, finished with a silicone cover, and paired with a long steel cable and three brass keys, it balances robust resistance with practical everyday use. The device is sized to secure fat-tire bikes, motorcycles, mopeds, and other larger two- or three-wheeled vehicles to fixed objects like racks, poles, and fences.

How much cutting and leverage resistance does this lock provide?

The NDakter lock uses an 18 mm hardened steel shackle engineered to withstand heavy hydraulic cutting forces and resist common leverage methods. A double-deadbolt mechanism plus a zinc-alloy cylinder reduce points of attack and slow down saws, hammers, and picks.

• 18 mm hardened steel shackle rated for very high cutting resistance
• Double-deadbolt locking to secure both sides of the shackle
• High-quality zinc alloy cylinder for improved pick and drill resistance
• Silicone sleeve and dust cover to protect components from weather and debris

Can I secure multiple bikes or larger vehicles with it?

Yes — the package includes a 6 ft x 0.4 in steel cable that extends reach and allows you to lock multiple frames or wheels together. The U lock alone secures a single frame to an anchor point; combined with the cable it can bind additional bicycles or accessories.

• U lock inner dimensions suitable for wide forks and fat tires
• 6 ft cable enables locking 3–5 bikes depending on arrangement
• Useful for e-bikes, scooters, motorcycles, and outdoor equipment
• Versatile for poles, fences, bike racks, and fixed anchors

What convenience features help daily use and longevity?

NDakter focuses on usability: a dust cover keeps dirt out of the keyway, three brass keys give you spares, and a silicone sleeve protects paint and reduces water contact. These features reduce maintenance and make the lock easier to operate over time.

• Built-in dust cover prevents grit from jamming the lock cylinder
• Three solid brass keys — carry one, store two spares
• 2.5 mm silicone sleeve protects bike finish and resists rusting
• Durable finish sustains outdoor exposure with lower corrosion risk

Will this lock fit my bike or e-scooter frame?

The tested outer dimensions are 7.8 x 9.2 in with inner clearance around 5.5 x 7 in, sized to accommodate thicker forks and larger wheel/tire assemblies. Check your mounting point and frame geometry to ensure the shackle clears the anchor point and the object you lock to.

• Outer dimensions: 7.8 x 9.2 in; inner clearance: approx. 5.5 x 7 in
• Designed for fat-tire bikes, e-bikes, mopeds, and scooters
• If uncertain, measure your frame and rack before purchase
• Note: mounting bracket is not included with the lock

Who is this for: Riders and vehicle owners who need a heavier, more resilient lock for high-risk or long-term parking — including e-bike commuters, students, bike-share operators, and anyone parking motorcycles or scooters in public spaces. It’s especially useful for people who want the convenience of spare keys, weather protection, and the option to secure several bikes or accessories with a single system.