Towbar-Mounted Cycle Carriers with Fog Lights on the Near Side – Why They’re Not Legal in the UK
Towbar-mounted cycle carriers are one of the most popular ways to transport bikes. They’re stable, easy to load, and ideal for carrying heavier bikes such as e-bikes. However, many drivers are unaware that some cycle carriers sold online and even through dealerships may not be legal for use on UK roads—particularly those fitted with a rear fog light on the near side (left side) only.
Understanding the legal requirements for rear lighting can help avoid fines, insurance issues, and safety risks.
The UK Rule for Rear Fog Lights
Under the Road Vehicles Lighting Regulations 1989, vehicles must have a rear fog lamp positioned either centrally or on the offside (driver’s side) if only one is fitted.
This rule exists for safety. The fog lamp must be positioned where drivers behind are most likely to see it clearly—typically on the right side of the vehicle in the UK. Guidance used during vehicle inspections and MOT testing by the Driver and Vehicle Standards Agency also reflects these positioning requirements.
If a cycle carrier is fitted to the towbar and it obscures the vehicle’s original fog lamp, then the carrier must provide a replacement fog lamp that meets the same positioning rules.
The Problem with Some Towbar Cycle Carriers
A growing issue in the market is cycle carriers that include only a left-hand (near-side) fog light on their lighting board.
This configuration is not compliant with UK regulations. If the fog lamp is only on the near side, it does not meet the requirement for a single fog lamp to be on the offside or centrally mounted.
As a result, using one of these carriers can technically mean the vehicle is being driven with incorrect lighting, which may lead to:
- A roadside fine
- Penalty points on your licence
- Potential insurance complications in the event of an accident
Why Lighting Matters with Bike Carriers
Towbar cycle carriers often cover important parts of the vehicle’s rear, including:
- Tail lights
- Brake lights
- Indicators
- Rear fog light
- Number plate
If any of these are obscured, the law requires additional lights and a visible number plate to be fitted on the carrier itself, in line with the requirements set out in the Road Vehicles Lighting Regulations 1989.
This is why most towbar carriers include a lighting board powered by the vehicle’s 7-pin or 13-pin towbar electrics, supplying indicators, brake lights, tail lights and a fog light.
However, the position of those lights must still comply with UK legislation.
How to Check If Your Cycle Carrier Is Legal
Before purchasing or using a towbar cycle carrier, check the following:
1. Fog light position
- If there is only one fog light, it must be on the offside (right) or in the centre.
2. Lighting board functionality
Ensure it includes:
- Indicators
- Brake lights
- Tail lights
- Rear fog light
- Number plate light
3. Number plate visibility
The vehicle’s registration must be clearly visible and illuminated.
4. Correct electrical connection
The carrier should connect to the vehicle’s towbar electrics (7-pin or 13-pin).
The Takeaway
Towbar-mounted cycle carriers are a safe and convenient solution for transporting bikes, but not all carriers meet UK lighting regulations. A common issue is a lighting board with a single fog lamp on the near side, which is not legal in the UK because the fog lamp must be positioned on the offside or centrally under the Road Vehicles Lighting Regulations 1989.
Drivers should always check the lighting configuration of any cycle carrier before using it. Choosing a compliant carrier not only keeps you within the law but also ensures your vehicle remains visible and safe for other road users.
