OnGuard Pitbull STD Lock Review

by Jamie on November 13, 2013

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The OnGuard Pitbull STD U-lock offers great protection at exceptional value.

The Pitbull boasts a respectable 14mm hardened steel shackle, and OnGuard have rated this lock 80/100 on their own security scale. This makes it ideal for high risk areas, such as inner-city and campuses.

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Gizmodo took their tools to this lock to see how well it stood up to the common attacks bike locks face in an attempted theft. This is what they had to say:

It’s invincible against hand tools. But it didn’t last two minutes against the angle grinder.

But let’s face it, no lock lasts much longer than a minute against an angle grinder so this is a perfectly good performance.

Popular Mechanics reported a very similar performance, stating:

We removed the device in just 1 minute 55 seconds [with an angle grinder], but it wasn’t easy. The large size made it difficult to keep the lock stable for cutting.

The surprising thing about this lock is the price; it can be picked up for around £22 online. Most cheaper locks are a false economy, but in the case of the OnGuard Pitbull, you are getting a great lock for very little money.

80/100 security rating

You should know that the manufacturer in question (On Guard) tests their own locks. This model has a safety rating of 80/100, which is more than just good. They test all the elements of a lock, the material hardness and how long it is needed for a thief to break the lock. Scores above 60 are usually very good, which suggests that 80 is almost perfect. Note: It isn’t possible to a lock to have 100/100 safety rating.

X4P locking mechanism

Another fact that makes On Guard manufacturer a bit different than other lock manufacturers is the locking mechanism itself. In this case, you will get X4P, which is the latest and the most advanced mechanism of this type ever made. It has numerous benefits, such as durability, possibility to be used in heavy-duty situations and it will keep operating even when it is wet, covered in snow or mud! In addition, it features smooth operation.

5 keys (1 with light)

There are 5 keys each owner of this lock will get. All of them are made with the help of alaser, so they feature the ultimate precision and their differences are microscopic. Unlocking the lock is for 10% smoother due to this simple advantage. Even more important one of 5 keys has a built-in light that can be used as aflashlight. Finding your lock and a bike at night, never was simpler.

For high-risk areas

U-lock with the TriRadius hardened steel made this lock perfect for areas where losing a bike is more than just a common thing. The manufacturer recommends using it in inner city areas and campuses. All about the locking question is focused on making it bulletproof when it comes to thieves. It is definitely a heavy-duty lock, perfect for the most demanding operations and usages.


  • Dimensions: 11.8 x 2 x 7.6 inches
  • Weight: 3.5 pounds
  • Material: Hardened steel
  • Color: Black/yellow
  • Comes with 5 keys (one has light feature)
  • Quick Release feature
  • X4P lock mechanism


  • Heavy-duty U-lock for the most demanding owners
  • Low weight
  • Made from extremely hard and resistant steel
  • H4P locking mechanism is well-known for impressive durability
  • Laser made keys with a light (1/5)
  • Small and practical


  • Some owners said it doesn’t look modern
  • Re-locking may be complicated


The U-lock here is perfect for people who want the ultimate protection. There are a lot of owners from some of the most bike-stealing-related places who claim their bikes are finally safe due to this lock. It is well-made and it is based on the latest technology. One of the related benefits is the X4P locking mechanism. Add the fact you get 5 keys, rather than 3 and you get a perfect lock.

The balance between the weight and size and price is astonishing! All aspects are as they should be, so we have a lightweight U-lock that can be used on most bikes and it will protect them without an error. We will add that this lock is definitely a choice if you want to secure your $600 bike.

LOCK YOUR BIKE score: 4/5

What are your thoughts about this lock? Let us know in the comments.

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OnGuard Pitbull STD Lock
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