Best heavy-duty locks for e-bikes

In its favour

• Rated Sold Secure Powered Cycle Diamond, the top grade on the powered cycle scale.
• A 205 x 112 mm internal area fits fat frames, cargo bikes and motorbike wheels.
• Three coded replaceable keys and a lifetime warranty once registered within 30 days.

Good to know

• At 2.75 kg it is the heaviest D-lock here and tiring to carry daily.
• A bike bracket or motorbike lock sleeve is sold separately.

In its favour

• Holds two top ratings: Sold Secure Powered Cycle Diamond and ART 4 star.
• At 1.8 kg it is much lighter than the DX1000.
• Anti-rotation double locking means both sides of the shackle must be cut, says Hiplok.

Good to know

• A 155 x 92 mm opening is tight for fat tubes and wide tyres.
• Shackle thickness is not stated in the listing.

In its favour

• Sold Secure Diamond rated, according to the title.
• A 26 mm diamond-coated, double-layered steel shackle with double deadbolt locking.
• Includes Kryptonite's Key Safe programme and a five-year anti-theft protection offer.

Good to know

• Internal dimensions are not stated, so check it fits your frame.
• The listing does not say which Sold Secure scale (pedal or powered) applies.

In its favour

• Sold Secure powered cycle Gold certificate, according to the listing.
• 170 cm length lets you lock frame and wheel to awkward street furniture.
• A textile sleeve protects paintwork and a keyhole cover keeps out dirt.

Good to know

• At 5.7 kg it is too heavy for most riders to carry every day.
• Gold rather than Diamond, so it is a step below the Hiplok locks.

In its favour

• Two locks in one set: a 14 mm chain with disc lock plus a separate New York LS U-lock.
• 14 mm hexagonal links with a narrow inner width to resist leverage, per Kryptonite.
• The New York LS U-lock is stated as Sold Secure Gold.

Good to know

• Weight is not stated, and a 14 mm chain is heavy to carry.
• The 100 cm chain is short for wrapping round wide posts.

In its favour

• 20 mm square hardened shackle with double locking in the body.
• Comes with the USH2500 bracket, so it rides on the bike.
• At 1.8 kg it matches the lightest lock in this guide.

Good to know

• No Sold Secure grade is stated, only the ABUS level 15 scale.
• Internal size is not stated, so check it fits a thick e-bike frame.

In its favour

• 170 cm long, so it reaches round wide posts and both wheels.
• Listed as cut resistant and anti-drill, with a 14 mm disc lock shackle.
• Comes with a two-year warranty, per the listing.

Good to know

• No Sold Secure rating appears in the listing.
• At nearly 6 kg it is impractical to carry every ride.