<div class="bbWrapper">53" bars are just right. 48" might fit. 50-58" will. <br />
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<a href="http://www.etrailer.com/roof-2013_Mazda_CX-9.htm" target="_blank" class="link link--external" rel="nofollow ugc noopener">http://www.etrailer.com/roof-2013_Mazda_CX-9.htm</a><br />
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There are several threads here on the subject.</div>
<div class="bbWrapper">Your car's on order? You can take em down you your dealer's lot to check. <br />
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I estimate the thule mount gap is about 44" on center. The rail tracks are 46" but the factory rails rise 3" and curve inward.</div>
<div class="bbWrapper">I highly recommend Thule crossbars over factory.<br />
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While the factory crossbars look better naked, your bike sits at an angle due the curvature of the bars. The Thule bars are straight.</div>