Trailer Bumpers (0)

Replacement trailer bumpers and rear underrun protection bars for commercial trailers. Rear underrun protection is a legal requirement under EC Regulation 58/2009 for trailers over 3.5 tonnes, and damaged or non-compliant underrun bars must be replaced before the annual test. Call our team to discuss fitment and current stock for your trailer type.

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Trailer bumpers and rear underrun protection at Truckstop Group

The rear underrun protection bar is a structural safety component on commercial trailers, designed to prevent a car from travelling under the rear of the trailer in a rear-end collision. Under EC Regulation 58/2009, trailers over 3.5 tonnes must be fitted with a rear underrun protection device meeting specified height, strength and ground clearance requirements. A damaged or visibly deformed underrun bar will fail the annual test and must be replaced.

Trailer bumper stock and fitment varies by trailer make, body type and build year. Steel and aluminium underrun bars are used across different trailer manufacturers. Mounting bracket configurations, bar height and ground clearance vary, so correct part identification requires the trailer chassis number or make-specific reference. Call our team to discuss availability for your trailer type.

In-stock trailer bumpers are available for UK nationwide delivery or same-day collection from our branches in Redditch, Worcester, Birmingham and Evesham. Heavier items may be subject to pallet delivery charges.

Frequently asked questions

Is a rear underrun bar a legal requirement on trailers?

Yes. Under EC Regulation 58/2009, trailers over 3.5 tonnes must be fitted with a rear underrun protection device meeting specified strength and clearance requirements. A damaged or missing bar will result in an annual test failure.

How do I identify the correct bumper for my trailer?

Trailer bumper configurations vary by make, body type and year. The most reliable method is the trailer chassis number. Call our team with this reference and we can check availability.

Can a damaged trailer bumper be repaired rather than replaced?

Repair may be an option for minor damage, but the bar must still meet the regulation's structural requirements after repair. A visibly deformed or cracked underrun bar should be replaced rather than repaired, as its ability to withstand impact loads cannot be verified by visual inspection alone.