Which bike trailer for dog should you choose? What to look for

A dog bike trailer is a practical way to bring your dog along on longer bike rides when they cannot – or should not – run the entire distance. It is especially useful for small dogs, older dogs, or dogs that simply cannot keep up with the same pace for a whole ride. But which dog bike trailer is right for your dog? In addition to your dog’s weight, you should consider their size, sitting height and length, the available space inside the trailer, the entry, suspension and how you plan to use the trailer.

Published: 30.09.2026

Which bike trailer is right for my dog?

The most important thing when choosing a bike trailer for your dog is to look at your dog’s size and needs, not just their weight or breed.

Consider:

  • your dog’s weight
  • your dog’s body size and sitting height
  • the trailer’s interior dimensions
  • whether your dog can sit and lie down comfortably
  • how easily your dog can get in and out
  • the trailer’s maximum load capacity

Two dogs with the same weight can need very different amounts of space. A tall dog, for example, needs more interior height than a compact dog of the same weight.

Tip: Always check both your dog’s weight and measurements against the trailer’s interior dimensions before choosing a size.

How big should a dog bike trailer be?

Your dog should be able to sit and lie comfortably during the ride. For medium and large dogs, the interior height is particularly important.

 

Hamax dog bike trailers come in three sizes:

  • Milou S – for small dogs

    Milou S is suitable for dogs up to 20 kg and with a sitting height of up to 45 cm. This compact dog trailer is designed for smaller dogs and can also be used as a dog stroller when combined with a separate stroller kit.

  • Pluto M – for medium-sized dogs

    Pluto M is suitable for dogs up to 35 kg and with a sitting height of up to 63 cm. With interior dimensions of 78 × 40 × 67 cm, it provides plenty of room for a medium-sized dog to sit and lie comfortably.

  • Pluto L – for large dogs

    Pluto L is designed for larger dogs and can carry dogs up to 40 kg when used as a bike trailer, with a sitting height of up to 82 cm. With interior dimensions of 100 × 54 × 80 cm, it provides considerably more space for larger dogs.

Remember: Don’t choose a dog bike trailer based on weight alone. Your dog’s body size and sitting height are just as important when choosing the right size.

Why is suspension important in a dog bike trailer?

When you cycle over uneven surfaces, bumps and vibrations are transferred to the trailer. Good suspension helps absorb these movements and can make the ride more comfortable for your dog. This is particularly noticeable when cycling on gravel roads, uneven cycle paths or longer rides.

Milou S, Pluto M and Pluto L feature adjustable suspension, allowing you to adjust the suspension according to use and load.

If your dog spends a lot of time in the trailer, suspension is therefore an important feature to consider for a more comfortable ride.

A low entry makes it easier for your dog

The entry is another important detail when choosing a dog trailer.

A low entry makes it easier for small, older or less mobile dogs to get in and out of the trailer themselves. It is also useful for larger dogs that may be difficult to lift.

All Hamax dog bike trailers therefore feature a low entry.

Pluto M and Pluto L also have openings at the front and rear, as well as on both sides. The side openings can be particularly useful for dogs that find it difficult to turn around inside the trailer.

Good ventilation is essential

A dog bike trailer should provide good ventilation. Large mesh panels allow air to circulate while giving your dog a clear view of the surroundings.

Good ventilation is especially important on warm days. Keep the trailer in the shade when taking breaks and always make sure your dog has access to fresh water.

A dog trailer for both cycling and walking

If you want to use the trailer when you are not cycling, a model with a stroller function can be a practical choice.

Pluto M and Pluto L come with both a bike arm and stroller wheel, allowing them to be used both as a dog bike trailer and as a dog stroller. A stroller kit is available separately for Milou S.

This makes it easy to combine different types of activities. Your dog can walk part of the journey and ride in the trailer when they get tired. When you reach your destination, the dog trailer can also provide your dog with a safe and familiar place to rest – for example at a café, when visiting friends or in other situations where having their own space is useful.

What features should you look for in a dog bike trailer?

In addition to choosing the right size and having good suspension, there are several practical features worth considering when choosing a dog trailer.

Useful features include:

  • a stable construction
  • good ventilation
  • a low entry
  • a parking brake
  • a safety leash attachment
  • removable wheels
  • a foldable design
  • an easy-to-clean interior
  • the option to add accessories such as a dog cushion and rain cover

A removable or washable interior also makes it easier to keep the dog trailer clean after muddy or wet rides.

How do I get my dog used to a bike trailer?

Not every dog feels comfortable in a dog bike trailer straight away. Give your dog time to get used to the trailer at their own pace.

Start by placing the trailer in a safe and familiar environment. Let your dog explore it on their own and reward them when they voluntarily enter and when they remain calm inside.

Once your dog feels comfortable, start by walking with the trailer and gently rolling it along. You can then introduce short bike rides before gradually increasing the distance.

A dog bike trailer should not replace your dog’s daily exercise. Instead, it should be used as a supplement. This allows your dog to join you on longer bike rides even when they are unable to run the entire distance.

Which dog bike trailer should I choose?

The right dog bike trailer is the one that suits both your dog and the way you plan to use it. Your dog’s weight, body size and sitting height determine which size is suitable. Suspension, ventilation, entry and practical features then affect comfort and how easy the trailer is to use in everyday life.

If you plan to use the dog bike trailer regularly, don’t just look at the maximum weight capacity. Check the interior dimensions as well and consider which features and accessories are important for you and your dog.

With Milou S, Pluto M and Pluto L, Hamax offers dog bike trailers in different sizes for small, medium-sized and large dogs.

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