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Adapting a Thule BigMouth to Factory AeroStyle Bars


Hi , I wish to fit my 2 Thule Big Mouth rack to my subaru outback which is fitted with factory aero style bars. Right now the original big mouth clamps fit tightly on a square thule bar. I m wondering if there is a elongated clamp that would accomodate the more aero bar. Or a claw style clamp like those on my thule box, those fit any bar. Since it does not have the slot in the bar the clamp must squeeze the bar itself. Thanks

Expert Reply:

I have a solution for you, but at this time, there isn't a clamp kit that replaces the original mounting gear on the Thule BigMouth.

Instead, I recommend the Thule Ride-On Adapter, part # TH532. This provides a smaller square bar that clamps onto your existing roof rack bars and allows you to mount the BigMouth's directly to that. Because of the quick-release nature of the bars, they're easy to remove after a ride.

If you'd rather outright replace the racks instead of having the adapter, I recommend the Thule ProRide, part # TH598003 which replaced the BigMouth and offers similar features, plus an easier to manage frame clamp and available integrated one-key locks as part # TH512

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