OnGuard Bulldog DT lock review

Security that wont break the bank

BikeRadar score4.5/5

Kryptonite and Abus rely on clever design to make their flagship locks secure, whereas OnGuard falls back on pure brute strength.

Aside from the tough U-lock, the addition of a 1.2m hoop-ended cable – easily long enough to loop through your front wheel and back through the shackle, keeping the head end secure too – makes the Bulldog DT’s sub-£40 price tag extremely tempting.

That’s providing, of course, that the lock is up to the security job. Luckily, the Bulldog’s shackle is immensely stiff and the armoured walled lock barrel is no wimp either – after five minutes of abuse from our hammer, saw and bolt croppers it was still operating, albeit with a slightly stiffer lock mechanism.

In test two we brought out the portable power tools, which severed the shackle in just over a minute. That’s a good time for a device that’s as well priced as this one. Remember that it had already been subjected to five minutes of attack before we resorted to the power tools. The Bulldog comes with one key, complete with a built-in LED light, and four spare ones as well.

Warren Rossiter

Senior Technical Editor
Approaching two decades of testing bikes, Warren can be found on a daily basis riding and exploring the road and off roads of Wiltshire's Salisbury Plain in the UK. That's when he's not travelling the world to test the latest kit, components and bikes.
  • Age: 44
  • Height: 188cm / 6'2''
  • Weight: 92kg / 203lb
  • Waist: 86cm / 34in
  • Chest: 112cm / 44in
  • Discipline: Road
  • Preferred Terrain: Big, fast descents and rough surfaces like cobbles or strada bianca
  • Current Bikes: Decade Tripster ATR, Dedacciai Temarario, Cannondale Synapse, BMC Granfondo Disc Di2, Genesis Day One CX, Parlee Z Zero Custom, Storck Scenario Comp Custom, DMR Trailstar, Bianchi Pista, Cube SUV 29er e-bike
  • Dream Bike: Bianchi Oltre Disc, Bianchi Specialissima, Cannondale Slate, Buffalo Bike
  • Beer of Choice: Brew Dog Punk IPA
  • Location: Wiltshire, UK

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