Last updated: 9 September 2026
The best dog bike trailer is one your dog can settle in comfortably and your bicycle can tow using an approved connection. Check both before comparing fabrics, pockets or optional stroller wheels. A trailer can suit a dog that cannot join a whole ride on foot, but it introduces a larger, heavier vehicle that needs careful handling.
Start with the dog, the bike and the route as three separate checks. Passing one does not compensate for failing another. A roomy cabin is no help if the hitch does not fit; a compatible hitch does not make a narrow, busy route suitable.
Table of Contents
Measure the cabin, not the photograph
Record your dog’s weight and measure the space they use when standing and lying in a comfortable position. Compare those measurements with the manufacturer’s usable internal dimensions, allowing for the shape of the roof and any cushion. A photograph of a different breed gives little useful scale.
The Thule Bexey M, model 800000, provides a concrete reference. Thule lists a maximum dog weight of 35kg and internal dimensions of 84 × 43 × 61cm. Its listed trailer weight is 15.8kg. Those are specifications for this model, not a promise that every dog under 35kg fits comfortably.
Check the doorway as well as the cabin. A dog may fit inside yet struggle to enter. Thule lists the Bexey M rear opening as 490 × 320mm and the step height as 170mm. If your dog has mobility difficulties, discuss loading with your vet instead of assuming a low entrance solves the problem.
Confirm the exact bicycle connection
Before ordering, send the seller your bicycle’s make, model, year and rear-axle details. Ask for confirmation of the required hitch and any adapter, using the trailer manufacturer’s compatibility information. Electric assistance, an unusual dropout or an unfamiliar axle should prompt a specific check, not an improvised attachment.
| Check | What to confirm before payment |
|---|---|
| Rear axle | Exact axle type and approved adapter, if required |
| Bicycle restrictions | Whether the bike manufacturer permits trailer use |
| Included parts | Hitch, connection hardware and any separately sold components |
| Loaded weight | All relevant limits, including the dog and permitted baggage |
| Instructions | Installation, operating limits and required checks for that model |
Do not substitute a child-trailer accessory merely because it looks similar. Thule’s Courier Dog Trailer Kit, for example, is specified for the Thule Courier. Product-family names matter when selecting conversion parts.
A model worth shortlisting
The Bexey M is worth investigating if its measured cabin fits your dog and its approved attachment fits your bicycle. Its dog-specific rear access and published dimensions make the initial suitability check straightforward. That is a specification-based shortlist, rather than a road-test verdict.
This article contains Amazon affiliate links. As an Amazon Associate, we earn from qualifying purchases.
Find Thule Bexey M dog bike trailers on Amazon UK. Check that the listing is the Bexey M trailer itself, rather than an accessory, and confirm the size, included connection parts and seller’s returns conditions. The search destination does not establish current stock or a particular bundle.
For any alternative, request the same information. A vague maximum weight without cabin measurements or an installation manual is insufficient for comparing an expensive purchase. Replacement wheels, fabric and coupling parts also deserve attention if the trailer will be used regularly.
Plan loading before the first ride
Introduce the stationary trailer gradually in a secure place, following its instructions for stability and restraint. Let your dog investigate without pulling them into the cabin. Practise relaxed entry and exit before adding movement. If the dog remains worried, pause and seek reward-based training help.
Use only the intended internal attachment and recommended equipment. Do not invent a tether arrangement that risks catching the neck or limbs. Check ventilation and your dog’s comfort throughout; mesh panels do not make hot conditions suitable for riding.
Become familiar with the trailer’s width, turning space and braking effect before transporting your dog. Choose a short, quiet, appropriate first route and follow all manufacturer operating limits. Avoid treating a successful garden introduction as evidence that a long road journey will be comfortable.
Check the practical ownership costs
Measure your doorway, storage space and car boot if the trailer must travel to a cycling route. Compare folded dimensions with the wheels and tow bar in the configuration the manual describes. Consider whether you can lift and assemble it comfortably without your dog nearby.
A stroller conversion, rain cover or extra hitch can change the total substantially. Price the complete setup you actually need and establish which accessories are approved. Our dog bike basket guide covers a different carrying format; our travel crate sizing guide can help you think about usable space. Neither replaces the trailer’s installation and fit checks.