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The Thule 599XTR Big Mouth bike rack combines value and function with an an easy-to-reach adjustment lever for simple loading and securing of the bicycle. Self adjusting clamping jaws automatically wrap around the bicycle frame downtube for precision hold. Transports virtually all types of bikes, including those with oversized bike frames with downtubes up to 3-3/8" in diameter (virtually all bikes fit within this measurement). Ideal for kids bicycles, bmx bikes, womens & hybrid bike frames, road & mountain bikes etc. No hassling with having to remove a bike wheel before loading the bicycle onto the carrier.
The Thule 599XTR Big Mouth attaches directly to Thule square load bars, Inno Roof Rack crossbars and Yakima round cross bars. Compatible with elliptical Thule Rapid Aero bars and Thule Xsporter truck rack using the Thule Car-Truck Rack Xadapt2 adapter kit. Also connects to car factory racks using the Thule 532 Ride-On Adapter. Dual locking design, simultaneously locks bicycle to the bike rack and the carrier itself to the car rack crossbars using one Thule lock cylinder (not included; see accessory add-ons below).
- The 599XTR Big Mouth patented self-adjusting closure optimizes clamping pressure automatically for worry free and perfect bike clamping every time.
- Compatible with virtually all bike types including kids, women's, hybrid, road, bmx & mountain bikes. Easily accommodates oversize downtubes up to 3-3/8" in diameter (virtually all bicycles fit within this measurement).
- Attaches directly to Thule square load bars, Inno Racks crossbars and Yakima round cross bars. Also mounts to elliptical Thule Rapid Aero load bars and Thule Xsporter truck rack using the Thule Xadapt2 adapters. Can also attach to car factory rack crossbars using the Thule 532 Ride-On Adapter.
- Dual locking design, locks bike to carrier and carrier itself to the roof rack crossbars using one Thule lock cylinder (not included; see accessory add-ons below).
- Easy-to-follow Thule 599XTR BigMouth installation instructions manual included.
- Thule Racks Lifetime Warranty!
» Thule 599XTR Big Mouth Bike Rack Instructions
» Thule Roof Bike Rack Comparison Chart
Thule 599XTR BigMouth Bike Rack Resource Wall
Product Reviews
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Accessories
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ORDERING NOTES
Attaches directly to Thule square load bars, Inno Rack crossbars and Yakima round cross bars. Also attaches to car factory rack cross bars using the Thule 532 Ride-On Adapter and can connect to elliptical Thule Rapid Aero bars and Thule Xsporter truck rack using the Thule Xadapt2 adapter kit.
Dual locking design, locks bike to carrier and carrier to roofrack bars using one Thule lock cylinder (not included; see accessory add-ons above)
QUICK ORDERING SOLUTION
Alternatively, we suggest using our easy Thule automated fit guide to quickly order the correct Thule Racks multi-purpose base car rack system and/or bike carrier attachments if you don't have one already installed:![]()




















