Stoplock Wheel Clamp HG 400-00 anti-theft lock for small-wheel cars, caravans and trailers (yellow)

If you’re trying to make your caravan, trailer or small-wheeled vehicle less of an easy target, a wheel clamp is about as direct as it gets. The Stoplock Wheel Clamp HG 400-00 is a physical, highly visible deterrent designed for wheels in a fairly specific size range, with a quick attach-and-go approach and three keys included.

The essentials

This is a wheel lock rather than an app-based or cable-style solution. On paper, that matters because it turns “just a quick move” into something slower and more effortful for opportunists. The clamp is also meant to be visually noticeable, which can be useful in places where you can’t control who’s around.

The HG 400-00 is aimed at small-wheeled setups: the wheel diameter and depth must fall within the stated limits for the lock to suit properly. If your wheels are in that bracket, you get a robust deterrent that you can physically secure when the vehicle isn’t in use.

It’s not a magic fix—any security choice depends on your overall habits and where the vehicle is stored. But as a straightforward “deny access” method, it ticks a lot of practical boxes.

What it’s designed for (and the size limits)

The key thing to get right is compatibility with your wheel measurements. This model is specified for:

• Wheel diameter: 13" to 15"
• Wheel depth: up to 8" deep

The description also provides equivalent sizing in millimetres for wheel diameter and depth, plus a note on maximum wheel depth (330mm to 382mm in diameter, and up to 205mm deep). Before you buy, measure both diameter and how “deep” the wheel is, because a clamp that’s too small or too large won’t sit right.

It may sound obvious, but this is where people often get stung with wheel locks: they buy based on general wheel size and forget that depth/fit can be the real deciding factor.

Where it stands out in everyday use

The HG 400-00 is built around a simple attach-and-secure routine. The description calls out “quick and easy to attach”, and it’s supplied with three keys, which is handy if you share access (family, yard/storage set-up, or multiple users).

In real-world terms, it’s the kind of thing you can apply before leaving the caravan site or when you’re parking up a trailer for a few days. If you’re the sort of person who wants something you can put on without fiddling around for ages, that’s the core appeal.

Also, the bright yellow finish is there for a reason: it helps make the security status obvious at a glance.

What to know about security deterrence

Wheel clamps work best as a visible barrier. They’re not trying to outsmart everything, instead, they aim to slow down theft attempts and discourage casual interference. That’s why physical and visual deterrence is specifically mentioned.

This can be a good match if:

• Your priority is preventing straightforward “drive-off” theft attempts.
• You want a security measure that doesn’t rely on power, pairing, or subscriptions.
• You keep vehicles in locations where visibility and discouragement can matter.

It may not be the best match if you’re expecting a wheel lock to fully replace other measures in high-risk scenarios—no single device is going to cover every threat. Think of it as part of your overall approach.

Tech specs

• Name: Stoplock Wheel Clamp HG 400-00
• Type: Anti-theft wheel lock / wheel clamp (physical deterrent)
• Colour: Yellow
• Suitable wheel diameter: 13" to 15"
• Suitable wheel depth: up to 8" deep
• Supplied with: Three keys

Who this is for (and who should look elsewhere)

It’s a solid pick if you own a caravan, trailer, or small-wheeled car where the wheel diameter and depth fall within the stated range. It suits buyers who want a robust, physical deterrent that’s quick to deploy and easy to live with.

However, you may want to skip it if you’re not confident about your wheel measurements. If you’re between sizes or unsure how deep your wheel is, it’s safer to double-check first than to assume a “close enough” fit. Wheel locks are practical—when they fit. When they don’t, they can be a hassle.

Is it worth it?

Buying this makes sense if you want a straightforward anti-theft wheel clamp for wheels between 13" and 15" diameter (and up to 8" deep), and you’re looking for something that’s quick to attach, physically secure, and visually obvious. The included three keys are a small but genuinely useful detail.

Don’t rush in if you haven’t measured wheel diameter and depth—compatibility is the make-or-break factor here. If your wheels don’t match the specified limits, you could end up with a poor fit, and that’s where value drops.

Mini FAQ

How many keys are included?

It’s supplied with three keys.

What wheel size does this clamp suit?

It’s specified for wheels with a 13" to 15" diameter and up to 8" deep.

Is it quick to attach?

The description states it’s quick and easy to attach, and the design is aimed at everyday use.

Does the yellow colour matter?

It’s a visual deterrent approach, so the bright finish is part of the concept.

Is this a full security solution?

It’s a deterrent device. It can help prevent easy theft attempts, but it’s best seen as part of a broader security routine rather than a complete guarantee.