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For the most ambitious adventures

The X’Plor MSO is an adventure tire designed for the most ambitious adventures. The combination of smooth-rolling center knobs and aggressive shoulder lugs provide great traction and durability for gravel roads, trails, urban assault and even pavement.

The MSO tire is named for the airport code of Missoula, Montana, home of the Adventure Cycling Association. Donnelly’s X’Plor adventure tire series is designed to bridge the gap between pavement and blazing your own trail.

Product details

  1. Smooth-rolling center knobs
  2. Aggressive shoulder lugs provide great traction and durability
  3. For gravel roads, trails, cyclocross, urban assault and even pavement

More options


Size 650C x 42mm 650C x 50mm
Diameter 650C 650C
Width 42mm 50mm
Compound 70a 70a
Bead Folding Folding
Type Tubeless Ready (TLR)/Clincher Tubeless Ready (TLR)/Clincher
Minimum pressure 35psi 35psi
Max pressure 55psi 55psi
ETRTO 40/62-584 50/61-584
Puncture protection Tread Belt Tread Belt
Studdable No No
Sealant volume 65mL 75mL
Weight 532g 670g
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Weights are based off Trek pre-production products at time of publication. Weights may vary in final production.

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