New Arrivals

Donnelly BOS Tubeless-Ready Cyclocross Tire 700x33


The ability to swap treads on race day is a key benefit of tubeless cyclocross tires. With the Donnelly BOS in your arsenal, you'll be ready for the worst wet and mud conditions in cyclocross racing. It is purpose-built for mud, rain, roots, and ruts with  an open tread pattern. 

Compared with the PDX, the BOS is even more aggressive. The Donnelly BOS features big, reinforced side knobs for cornering traction and grip on off-camber sections.

  • 700x33
  • Tubeless-ready with folding Aramid bead
  • 456 grams
  • Superior grip thanks to a soft rubber durometer

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