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The flush design keeps the crossbars tight to the roofline, giving your setup a sleek, from-the-factory look. Nothing sticks out past the feet, so the rack blends right in and keeps a low profile. The 37-1/2" and 41" aluminum bars sit snug and clean, adding utility without bulk.
Wind noise can make long drives tiring, especially with gear up top. These aero-style crossbars help quiet things down with their streamlined shape and split rubber strips that fill the top channels. The strips close around your mounted accessories to reduce wind noise and vibration while you’re driving, making the ride smoother and more comfortable.
Whether it’s kayaks in summer or a cargo box for a cross-country trip, these bars are ready for any adventure. The top channels let you mount accessories directly or clamp them around the bars. They’re compatible with most bike, watersport, snow, and cargo carriers, so you can easily switch between setups without needing a new rack each time.
Some racks require trimming rubber strips before mounting accessories—these don’t. The split strip design lets you slide your gear right into the top channels without extra cutting or fitting work. The strips seal back up around the mounts, keeping out wind and debris while keeping installation simple.
You can secure your setup with Thule’s One-Key System locks (sold separately). They help deter theft of both the rack and any channel-mounted accessories, giving you peace of mind when you leave your vehicle parked on road trips or at campsites.
Ratings & Reviews

Jenny N.
3/15/2023
I agree with you that the rack should include the keys however Thule only offers the one lock system separately as part # TH450400 for a 4 pack. They do it this way so that if you have other Thule accessories like a Thule kayak or bike carrier then you can have the option of ordering enough keys to swap them all out to key them the same. For example you can also buy a six part part # TH450600 or an eight pack like part # TH450800.

Victoria H.
3/20/2025
That's impressive Clare! Its always nice when install is a breeze. What are you planning on mounting on your roof rack?
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Gwendolyn Y.
1/8/2026
Congrats on your new Benz! Sounds like a fun and exciting Christmas morning. I'm only slightly jealous of that tandem bike, I've always wanted to ride one.