Why do my roof bars whistle?
Free checks first
- The rubber strip in the T-track slot along the top of the bar: it must run the full length with no gaps. Cut-back or missing strip is the classic cause.
- End caps: make sure both are fitted and clipped home.
- Feet: check they are tight and the bars sit level.
- Position: try moving the front bar back a little, within the positions your fit kit allows.
Replacing the rubber strip
Strips are specific to the bar model and length. Thule's newer WingBar Evo uses a split strip that you do not cut, and a retailer notes that the older cover strip does not fit it, so order the strip for your exact bar.
If the bars are square or round
Square and round steel bars are cheaper but noisier at motorway speed than aerofoil bars. If you leave the bars on all year, aero bars are worth it.
Where to buy
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Frequently asked questions
Do roof bars increase fuel use?
Yes, they add drag, more so with a box or bikes. Take them off when you do not need them.
Will a wind deflector stop the noise?
A fairing can help on some bars, but fix the strip, caps and feet first.
Why did the noise start after fitting a carrier?
The T-track strip is often cut or removed to fit a carrier. Refit the spare sections in the open parts of the slot.