What actually matters when you’re choosing a roof bar system, and when renting beats buying outright.
Now you know how roof bar compatibility actually works, the next question is which roof bars to actually buy.
The right answer depends on your situation. Are you using bars every month, or once a year? Do you want the lowest price, or are you willing to pay for quietness and better resale value? Are you keeping the system for years, or just trying it out for one trip?
What to look for in a roof bar setup
Before comparing brands, here’s what genuinely matters.
Noise level when the bars are empty comes down to aerodynamic design: bar profile, rounded edges and a sleek shape all reduce wind noise. Thule WingBar Evo is genuinely quiet at motorway speeds. Some budget bars whistle noticeably, and you’ll notice it every single drive, loaded or not.
Modular design is worth checking too. Can the bars move to a different car’s fitting kit later? Will they work with Thule bike racks or other third-party accessories? Thule and Roof Doctor both score well here. Generic “universal” bars tend to be harder to build on.
Material quality affects both weight and longevity. Aluminium bars are lighter and quieter than steel, cost a little more, but won’t rust and hold their resale value better. Steel bars are heavier and need occasional maintenance to avoid corrosion. For a car kept outside in the UK, aluminium tends to be worth the extra.
Weight limit is a hard constraint, not a nice-to-have. Most road-use bars are rated to 75kg or 100kg. If you’re planning to carry a roof tent (typically 60-90kg), a heavier roof box (30-40kg), or combine a box with a ski rack, check both the bars’ rating and your car’s own maximum roof load in the handbook. Whichever figure is lower is your actual limit.
Load-carrying design varies too. Some bars, Thule’s included, come with built-in T-tracks that let you attach accessories without extra fittings. Others just offer a flat top surface. If there’s any chance you’ll add a bike rack or different roof box later, T-track bars give you more flexibility down the line.
Best options for different scenarios
If you want to spend under £150 and you’re just starting out, look at Roof Doctor or Firrak modular systems. Roof Doctor’s bars typically run £120-£150 depending on your roof type, with a reasonable foot pack included. You won’t get Thule’s quiet aerodynamic profile, and the bars will be heavier since they’re usually steel rather than aluminium, but they’ll do the job reliably if you’re only using them a handful of times a year. For a car with no roof rails, a universal clamping foot pack from Roof Doctor or a similar brand will clamp the door frame fine, provided it’s the correct clamp type for your car’s specific roof shape.
For £150-£250 and a system you’ll keep for years, Thule WingBar Evo is the obvious mid-range choice. Aluminium, quiet, modular, and available for nearly every car on the road. A complete setup, bars, foot pack and fitting kit, typically runs £150-£220 depending on your vehicle, with a five-year guarantee included. If you change cars later, the bars can usually move across to a new fitting kit.
If you’re carrying loads regularly or want maximum strength, Thule ProBar or WingBar Edge are the next step up. ProBar is older, heavier and essentially bulletproof. Edge is newer, lighter, and has better aerodynamics. Both are rated for heavier everyday use and have robust foot pack designs. Expect £250-£350 for a complete setup, which is worth it if the bars are staying on the car long-term and being used hard.
For the quietest, most refined systems where budget genuinely isn’t the deciding factor, Thule ProBar or SlideBar (where your car is compatible) are worth considering. SlideBar lets you slide the bars along the roof for easier loading and unloading. These start around £300 and really only make sense if you’re using the bars weekly or particularly dislike wind noise.
Why Thule WingBar Evo keeps coming up
Look at any roof bar forum, review site or secondhand listing and WingBar Evo appears constantly, and it’s not simply marketing. It’s quiet enough for daily driving, it’s aluminium so it won’t rust, it’s available for nearly every car on the road because Thule maintains fitting kits for thousands of vehicle combinations, it works with third-party accessories, and it looks clean fitted to most cars. If you ever change cars, you can usually reuse the bars with a new fitting kit rather than starting from scratch.
That said, it isn’t the only sensible option. Go Roof Doctor if you want something cheaper, ProBar if you need heavier-duty capability, or a mid-range Firrak system if your budget is tight but you’re planning to keep the bars for years.
New versus secondhand: what actually makes sense
Buying used roof bars is cheaper on paper, but it’s exactly where people waste money by ending up with the wrong kit.
Secondhand makes sense when you find a genuinely complete kit, bars, foot pack and the correct vehicle-specific fitting kit for your car, from a seller who clearly knows what they’re selling. At around 60% of the new price, with no damage and a local pickup avoiding postage costs, you might pay £80-£100 against £150-£200 new, which is a real saving.
It’s a trap when the seller has bars and a foot pack but no fitting kit, describes bars from a different car as something that “should work on yours,” or is vague about which specific model the kit was designed for. In each case you’ll likely end up buying a fitting kit separately anyway, at £30-£50, which brings the total close to new prices without a guarantee and without any certainty about how well the original bars were treated.
A reasonable rule of thumb: if working out whether a used kit will actually fit your car takes more than half an hour of research, it’s probably not worth the saving. New bars from a registered dealer give you instant fitment confirmation by registration, a proper guarantee, and the reassurance of buying from someone who actually knows what they’re selling.
Where to buy and what to confirm before ordering
Specialist roof bar dealers such as roof-bars.co.uk, roofracks.co.uk, driveden.com and roofbox.co.uk are worth starting with. All offer registration lookup tools, so you enter your reg, they confirm exactly what fits, and the correct kit arrives without guesswork. Pricing is competitive and postage is usually free on the UK mainland.
General retailers like Halfords stock Thule and other brands at similar prices to the specialists, with the advantage of seeing bars in person before buying, and some stores offer fitting on-site if you buy there.
Online marketplaces such as eBay and Amazon are fine for replacement parts once you already know exactly what you need, but riskier for complete kits unless you’re confident about fitment, and returns can be more awkward if something doesn’t fit.
Whichever route you go, confirm your car’s registration has actually been checked against the kit, that the vehicle-specific fitting kit is included rather than sold separately, that the bar length matches your roof width, that the material is what you want, that the foot pack suits your roof type, and that the weight limit covers what you intend to carry. If a seller can’t answer these clearly, it’s worth asking directly rather than assuming.
When renting makes more sense than buying
If you’re only using roof bars once or twice a year, buying probably doesn’t make financial sense, and it’s worth doing the maths honestly.
A decent complete roof bar kit costs £150-£200. Renting a roof box setup through a platform like RentMyRoofbox typically costs £25-£40 a day. At three days’ use a year, that’s £75-£120 in rental costs against £150-£200 to buy outright, so renting wins comfortably for occasional use. Stretch that to six days a year and rental costs climb to £150-£240 annually, which starts to overtake the one-off cost of buying.
There’s also a convenience factor worth weighing in. Renting typically means the bars arrive already fitted to a roof box by someone who knows what they’re doing. Buying means either fitting the system yourself with an Allen key and a torque wrench, or paying a fitter £40-£60 for the job, which can tip the balance towards renting for a single trip even where the raw numbers are close.
As a rough guide, if you’ll use the bars more than four times a year, buying makes sense. For a one-off trip, or if you’re testing whether roof bars suit your lifestyle before committing, renting is usually the better call.
So what would I do?
If your car has roof rails, raised or flush, go straight for Thule WingBar Evo. Enter your registration on a dealer site, confirm the fitment, and order. You’ll end up with quiet, reliable bars that work with nearly any accessory and that can likely move to your next car too.
If your car has no roof rails, or you’re not sure, use the same dealer lookup to confirm your roof type first. WingBar Evo is still a solid choice for a clamping setup, or go Roof Doctor if saving £50 matters more to you than the extra refinement.
If you’ve only got one or two trips planned this year, don’t buy at all. Rent instead, and save yourself the fitting kit puzzle entirely.
If you’re buying secondhand regardless, only do it for a complete kit, bars, foot pack and fitting kit, matched to your exact car and roof type, ideally with the seller able to quote the specific fitting kit part number. If they can’t tell you that, they don’t fully know what they’re selling, and neither will you until it’s too late to return it easily.
If you drive a Ford Focus, Skoda Octavia or VW Golf, our dedicated compatibility guides for those cars can save you some of the legwork on which specific kit to look for.