Update date: 2026.01.09

Suitcases you shouldn't buy: How to choose the right one and recommended brands

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A suitcase is essential for travel preparation. However, if you choose the wrong suitcase,

Things can break during your trip, your luggage can get wet, and you can end up stressed, all of which can ruin your trip.

In this blog, we will narrow down the characteristics of suitcases that you should not buy to seven points and explain in detail the reasons and risks involved.

In addition, we will introduce how to choose a suitcase that will not disappoint you and our recommended brand, New Trip .

Please use this as a reference to make your next trip more comfortable!

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table of contents

1. The importance of choosing a suitcase

2. Characteristics of suitcases you should not buy

　1. 品質が低い：すぐ壊れる「安物素材」

　2. 機能が足りない：旅先でトラブルを招く

　3. 設計バランスが悪い：重い・入らない・使いにくい

　4. ブランドが信頼できない：買った後に泣く

3. How to choose the right suitcase

4. Recommended Brand: New Trip Suitcases

5. Summary

六、まとめ

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一、スーツケース選びの重要性

Suitcases are essential for transporting your belongings safely and making your trip go smoothly.

However, if you choose a bag based solely on appearance and price, you may face many risks, such as damage at the airport, travel inconvenience, and security issues.

You may face a variety of problems.

Modern travel demands lightness, durability and security.

This article will help you make a smart choice by listing specific suitcase features to avoid.

<Related Articles>

・Complete guide to choosing the right suitcase size! Capacity guide by number of nights [2025 Edition]

・A simple guide to suitcase recommendations, how to choose, and how to use them
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二、買ってはいけないスーツケースの特徴

Here are seven characteristics of suitcases you should avoid buying:

We will explain each feature in detail, including the specific reasons, risks, and alternatives.

■ 1. 品質が低い：すぐ壊れる「安物素材」

Reason : The thin ABS plastic often used in cheap suitcases is weak against impacts and prone to cracking and breakage during handling at airports.

Low-quality plastic zippers and poor stitching can also cause items to break easily.

-Risk : The suitcase may break at the airport, exposing or damaging your luggage.

If the zipper breaks, you won't be able to get your luggage out while traveling.

In fact, there have been reported cases where the zipper on a suitcase costing around 5,000 yen broke after just one trip.

・Recommendation : Choose materials that are both durable and lightweight, such as polycarbonate or aluminum alloy .

Choose a high-quality zipper such as YKK and check for models with careful stitching.

New Trip 's polycarbonate models are highly rated for their durability.

■ 2. 機能が足りない：旅先でトラブルを招く

Reason : Cheap plastic casters are unstable and wear out or fall off when traveling over uneven surfaces or long distances.

A wobbly handle or one that is difficult to adjust is difficult to use and prone to breaking.

- Risk : If the wheels break at the airport or station, you will not be able to pull your suitcase and will have to carry it by hand.

If the handle gets stuck halfway, it becomes stressful every time you lift it.

There are many reviews of cheap suitcases whose wheels broke on the second trip.

・Recommended : Choose four-wheel casters made of rubber or ABS composite material with ball bearings.

Models with replaceable casters will last longer, and handles that can be smoothly adjusted in multiple positions are recommended.

New Trip 's 360-degree rotating casters are highly rated for their smooth movement.

<Related Articles>

・Suitcase caster strategy! How to choose and easy care

・[Travel Troubles] What to do if your suitcase breaks? A thorough explanation of the parts that break easily and how to deal with them

■ 3. 設計バランスが悪い：重い・入らない・使いにくい

Reason : Suitcases without TSA locks

When traveling internationally (especially to the US), the lock may be broken during security checks.

If your luggage does not have waterproof zippers or materials, it will get wet in the rain or humidity.

- Risk : Without a TSA lock, your suitcase may be broken during inspection, increasing the risk of theft and loss of your luggage.

Without waterproofing, your clothes and electronic devices will get wet when traveling during the rainy season or in humid regions (e.g., Southeast Asia).

There have been cases where cameras have broken down in non-waterproof cloth suitcases.

・Recommendation : Choose a suitcase with a TSA-approved lock to ensure safety on international travel.

Models with waterproof zippers and polycarbonate material protect your belongings even in rainy weather.

New Trip 's TSA-locked models are highly reliable in terms of security.

<Related Articles>

・How to use a suitcase TSA lock (part 1) - Zipper lock

・The appeal of TSA locks and frame types - choosing the best suitcases!

■ 4. ブランドが信頼できない：買った後に泣く

Reason : Heavy suitcases are difficult to carry and can easily exceed airline weight limits (e.g., 23kg for economy class).

Models with inefficient internal designs or no expansion features can hold less luggage than their apparent size suggests.

Risk : Heavy suitcases can be exhausting at airports and up stairs, and you may end up paying excess baggage fees.

If the capacity is insufficient, you won't be able to fit all your luggage when traveling with your family, and you'll need an extra bag.

Models that look large but only have an actual capacity of 30L are difficult to use.

・Recommendation : Choose a suitcase made from lightweight materials (such as polycarbonate) and keep the weight below 4kg.

Look for expandable models and ones where you can check the actual capacity through reviews.

New Trip 's lightweight models offer a good balance of capacity and weight.
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三、失敗しないスーツケースの選び方（チェックリスト）

To avoid making a mistake when choosing a suitcase, keep the following points in mind:

  • Choose a trusted brand :
    New Trip, of course, and many others. Reputable brands offer quality and support. Check reviews and warranties.
  • Match your travel purpose :
    For business trips, a lightweight and compact model is preferred, while for family trips, capacity and expandability are important. Prioritize functionality that suits your purpose.
  • Balance of durability and light weight :
    Polycarbonate material is both durable and lightweight, ideally weighing less than 5kg.
  • Prioritize security and waterproofing :
    TSA locks are essential for international travel, and waterproof zippers and materials are recommended for areas with a lot of rain.
  • Check actual capacity :
    Don't just look at the size, check the reviews and specifications to see the actual capacity (in liters). It's convenient to have an expansion function.
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四、スーツケース選びで迷ったときの考え方

This flagship model, representing New Trip, avoids the "don't buy" criteria and meets the high standards of durability, quietness, and convenience sought by travel professionals.

・The ultimate device that eliminates travel stress: "New Trip 0502"

If you're wondering, "Which one should I buy to make sure I'm not disappointed?", we confidently recommend the "0502" model. It overcomes all the drawbacks that you might regret with a budget suitcase.

  • World-renowned "HINOMOTO" casters: These wheels solve the problem of "noisy casters," the most notable suitcase issue. Incredibly quiet and smooth, they allow you to move around smartly, even in the early morning or late at night, without disturbing those around you.
  • Expandable capacity up to 115L: Avoid regrets like "I chose the wrong size." Simply open the side zipper to expand the gusset, allowing you to store souvenirs with ease.
  • Durable 100% polycarbonate body: Made entirely of high-quality, impact-resistant polycarbonate, it does not use any cheap, easily broken plastic (ABS). It combines lightness with incredible strength.
  • Zinc alloy corner pads: The corners, which are most susceptible to impact, are made of durable zinc alloy instead of plastic, ensuring your valuables are protected from drops and shocks.
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✔ 条件を満たすモデルの考え方

ここまでの条件（軽量・耐久性・キャスター性能・必要な機能）をすべて満たすモデルは、実際には限られています。
そのため、「すべて平均以上のバランス」を基準に選ぶのが現実的です。

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✔ 一つの選択肢としての New Trip

こうした基準で選ぶ場合、New Tripのスーツケースは一つの選択肢になります。

  • 軽量かつ耐衝撃性のある素材（100%ポリカーボネート採用モデルあり）
  • 静音性に配慮したキャスター設計（HINOMOTO製採用モデルあり）
  • 拡張機能や実用的な内部構造（20％容量UP）
  • TSAロックなど基本機能を標準搭載

特に「New Trip 0502」スーツケースは、上記の条件をバランスよく満たした一台です。

New Trip 0502 スーツケース

大容量・HIMONOTOキャスターモデル

New Trip 0502

S/M/L三種類のサイズ｜100%PC素材

拡張機能 USB充電ポート HIMONOTO製キャスター スマホスタンド

¥19,980~

商品を見る
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✔ 選ぶ際の最終ポイント

最終的には、ブランド名ではなく：

  • 自分の旅行スタイルに合っているか
  • 必要な機能が過不足なく揃っているか

で判断することが重要です。

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五、よくある質問（FAQ）

Q1. 安いスーツケースは本当にダメですか？

A1：すべてが悪いわけではありませんが、素材やキャスターの品質が低いモデルは故障リスクが高いため注意が必要です。特にABS素材のみのケースや無名キャスターは、空港での衝撃や長距離移動でトラブルが起きやすい傾向があります。

Q2. スーツケースは何年くらい使えますか？

A2：使用頻度によりますが、一般的には3〜5年程度が目安です。キャスターやジッパーなど可動部分が先に劣化するため、定期的なチェックとメンテナンスが重要です。

Q3. ポリカーボネートとABS、どちらが良いですか？

A3：耐久性を重視するならポリカーボネート（PC）がおすすめです。ABSは価格が安い反面、衝撃で割れやすい傾向があります。長く使うことを考えると、PC主体のモデルの方が安心です。

Q4. 機内持ち込みサイズはどのくらいですか？

A4：航空会社によって異なりますが、一般的には三辺合計115cm以内（例：55×40×25cm）が目安です。LCCはさらに厳しい場合があるため、事前確認が必要です。

Q5. TSAロックは必要ですか？

A5：海外旅行（特にアメリカ）では必須に近い機能です。TSAロックがない場合、検査時にロックを破壊される可能性があります。

Q6. スーツケースは大きめを選んだ方がいいですか？

A6：必ずしも大きければ良いわけではありません。 大きすぎると重量制限を超えやすくなるため、荷物量に合ったサイズ選びが重要です。迷った場合は拡張機能付きモデルも選択肢になります。

Q7. キャスターは何輪が良いですか？

A7：現在は4輪（ダブルキャスター）タイプが主流で、安定性と操作性に優れています。特に空港や駅などの平坦な場所では取り回しがしやすくなります。

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まとめ

A suitcase is an important item that determines the comfort and safety of your trip.

Avoid the characteristics of "suitcases you shouldn't buy" and keep the following points in mind.

Durable materials and components (polycarbonate, YKK zippers).

High-quality casters and handles ensure smooth movement.

TSA lock and waterproof design ensure security and luggage protection.

A lightweight model with ample capacity .

Long-term peace of mind with a trusted brand .

A model equipped with the latest technology .

Simple and purposeful design .

If you keep these points in mind and choose a suitcase from a trusted brand like New Trip , you'll be able to travel stress-free!

I hope your next trip is wonderful!

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