Choosing the right roof box can be confusing. With so many shapes, sizes, and brands on the market, it’s easy to buy something too small — or far too big.
At West Midlands Roof Box Hire, we help families, couples, and holidaymakers every week to find the perfect size Thule roof box for their car and their trip. Whether you’re heading to the mountains, the coast, or the countryside, this guide will help you understand what size roof box you really need and why hiring locally is the easiest way to get it right.
1. Why Roof Box Size Matters
A roof box isn’t just about capacity — it’s about balance, aerodynamics, and practicality.
A box that’s too small won’t fit everything you need, while one that’s too large can affect wind resistance or fuel economy. The perfect size depends on your car type, number of passengers, and what you’re packing.
That’s where hiring from an expert comes in. At West Midlands Roof Box Hire, we’ll help you choose a box that looks right, fits correctly, and suits your journey.
2. Understanding Roof Box Capacity
Roof boxes are typically measured in litres — most fall between 300L and 600L. Here’s what that means in real terms:
- 300–400 litres: Ideal for smaller cars or couples. Fits luggage for 2–3 people, or a few medium suitcases.
- 470 litres: The most popular all-rounder. Perfect for families, fitting 3–5 suitcases, or a mix of luggage and outdoor gear.
- 580 litres: Extra-large size for long family holidays, camping trips, or ski equipment.
We stock both Thule 470L and 580L roof boxes, giving you flexibility based on your plans.
3. The Perfect Roof Box for Families
Families often find that once you add pushchairs, toys, bags, and coats, even the biggest car boot fills up quickly.
A 470L Thule roof box adds the perfect amount of extra space without making the car feel top-heavy. It’s ideal for most UK family cars and SUVs, giving you room for everything while keeping the cabin comfortable and clutter-free.
For those heading on longer journeys or taking bulky gear like skis, a 580L roof box provides even more freedom — turning stressful packing into smooth, organised travel.
4. How Roof Box Shape Affects Performance
Roof boxes come in different lengths and heights, which can influence both style and performance.
- Shorter boxes are great for smaller vehicles or when you need space on the roof for bikes or a kayak.
- Longer boxes are ideal for larger cars and families travelling long distances.
- Lower-profile designs improve aerodynamics and fuel economy.
Our Thule boxes are designed with aerodynamic lines that reduce drag and wind noise — so you can enjoy quieter, more efficient journeys.
5. Safety and Weight Considerations
It’s not just about space — it’s about staying within safe limits.
Every car has a maximum roof load, which includes the weight of the bars, box, and luggage. That’s why fitting matters. We ensure every roof box is properly balanced, within your vehicle’s safe range, and securely attached.
When you hire from West Midlands Roof Box Hire, our professional fitting service means you never have to worry about getting it wrong.
6. Why Hiring Makes More Sense Than Buying
If you only need extra storage once or twice a year, buying a large roof box doesn’t make financial sense. A quality Thule box can cost between £500 and £700, and you still have to find somewhere to store it.
Hiring means you get the exact size you need, fitted and ready to go, for as little as £85 for a week or £125 for two weeks.
You can change sizes each time depending on your trip — so you’ll always have the right roof box for the job.
7. How to Choose the Right Box
Here’s a simple guide:
- Small car, short trip: Thule 470L roof box.
- Family holiday, long drive: Thule 580L roof box.
- Ski or camping trip: 580L roof box with longer storage space for equipment.
If you’re unsure, our team will take a few details about your car and trip, then recommend the perfect fit — no guessing, no wasted money.
In Summary
Choosing the right roof box is all about matching size, shape, and practicality to your car and journey.
With West Midlands Roof Box Hire, you can test and enjoy different Thule box sizes without buying or storing one permanently. It’s simple, affordable, and tailored to you.
Contact Details
West Midlands Roof Box Hire
Unit 154 Amington Industrial Estate, Sandy Way, Tamworth, B77 4ED
Tel: 07903 839112
Email: westmidlandsroofboxhire@gmail.com