Rider-matched picks
Size-matched locks picks for e-bike riders, with fit and feature priorities curated for how e-bike riders actually ride.
E-bikes weigh 20-30 kg compared to 8-12 kg for acoustic bikes, which fundamentally changes how sizing affects handling. The extra weight actually improves stability at speed but makes low-speed maneuvering and stopping more critical — ensure you can confidently put both feet flat on the ground when stopping, especially if you're new to cycling. Step-through frames are strongly recommended for riders with any flexibility limitations, as swinging a leg over a heavy e-bike is significantly harder than a standard bicycle. Mid-drive motors (Bosch, Shimano, Brose) center weight low near the bottom bracket, providing better balance than hub motors which place weight in the wheel. Battery placement (downtube integrated vs rear rack) also affects weight distribution — integrated downtube batteries provide the most natural handling. When sizing, use the same frame size you'd ride on an acoustic bike of the same type — e-road bikes size like road bikes, e-MTBs size like mountain bikes. The motor assist actually makes sizing slightly more forgiving, as you're less reliant on optimal pedaling efficiency.
Match lock value to bike value (rule of thumb: spend ~10% of bike value). Inner U-lock dimensions need to clear frame + wheel + secure object. Standard U-lock: 4" x 9" fits most frames/single wheels. Compact: 3" x 6" for lightweight bikes/portability.
Verified on Amazon today — prices and availability may vary.
Kryptonite
Inner dimensions: 4" x 9" (10 x 23cm). Fits frame + single wheel through U + around fixed object. Standard commute size.
Abus
Inner dimensions: 5.5" x 8" (14 x 20cm). Premium size for frame + wheel security. Heavy-duty for high-theft areas.
Onguard
Inner: 3.5" x 7.5" (9 x 19cm). Mid-size U-lock suitable for commute + light recreation. Affordable high-security option.
Hiplok
Inner: 4" x 7" (10 x 18cm). Ultra-heavy-duty; ranks among world's most secure locks. Premium choice for high-end bikes in theft-prone areas.
Master Lock
Lengths: 5mm x 6ft (1.8m), 8mm x 8ft (2.4m). Armored cable with protective nylon coating. Casual/low-risk use.
Seatylock
Inner dimensions available in 4 sizes: 3" x 6" to 4" x 9". Premium hardened steel shackle. Design award winner.
Axa
Lengths: 8mm x 2m, 10mm x 2.5m. Armored steel cable with protective sleeve. Popular in EU for casual commuting.
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