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Gravdal - 650b


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Versatile and confidence inspiring, the Gravdal securely navigates through harsh winter conditions with steel carbide studs for added traction in icy conditions.

  • Siping creates a more conforming lug for added traction
  • 240 concave carbide studs tear into slick surfaces
  • Fast rolling ramped center lugs provide decreased rolling resistance
  • Aggressive rear faces of center lugs provide excellent braking traction
  • Tubeless ready (60tpi)
  • We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.
650b x 38mm (584/Road)
View Tire Geometry Chart
33tpi or 60tpi
240 Concave Carbide Studs
Wire Bead or Folding Bead
20-28mm wide rims

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Audio: (chill inspirational music) Video: A man rides a fat bike quickly through a sunny, wintery, and wooded environment. "45NRTH Gravdal" text is overlaid as he rides and kicks up snow. Audio: [Narrator] Gravdal is our middle-width winter commuting tire. It has enough traction in poor conditions to give riders confidence in sketchy terrain while also remaining efficient over dry sections of road. Video: A Gravdal tire rotates in view. Audio: Traction comes from siping on the side lugs and the center lugs. Video: The view zooms in and “Siping: Increased grip on ice & snow.” text is shown alongside highlighted center and side lugs with two parallel grooves on their face. Audio: Carbide studs provide traction on icy surfaces as well. Video: “Carbide-Tipped Studs: For grip on ice.” text is shown alongside highlighted side lugs with studs. Audio: Tightly-spaced ramped center lugs roll smoothly and efficiently. Video: “Tightly-Spaced Center Lugs: Ramped for rolling efficiency.” text is shown alongside highlighted condensed 1-1-1 center lug pattern. Audio: Gravdal is available in the following sizes and constructions. Video: View zooms out and “650b x 38mm: 33TPI Steel Bead, (240 Carbide Studs)” text is shown for sizing. Audio: (calm music) Video: 45NRTH logo and “” text is shown, along with Instagram, Facebook, and Twitter logos.


  • Acceleration Traction
  • Braking Traction
  • Cornering Traction
  • Rolling Efficiency
  • Flotation
  • = Icy Conditions
45NRTH Gravdal 650 Studded Tire - black - 33 TPI - three quarter view