45NRTH Dunderbeist Fat Bike Tire
45NRTH Dunderbeist Fat Bike Tire

45NRTH Dunderbeist Fat Bike Tire

Regular price$112.50
  • In stock, ready to ship
  • Inventory on the way

SHIPPING: Fyxation believes in shipping fast! Most orders ship weekdays within 24 hours. We ship via USPS Priority Mail or USPS Ground in the U.S. and via DHL Internationally. Tracking is sent at the time of shipment.

NO HASSLE RETURNS / EXCHANGE: You can return or exchange any product you've purchased in new condition within 30 days.


Every year the tire options for fat bike riders continues to expand and with the addition of the Dunderbeist, 45NRTH is addressing an ever growing part of the market - groomed single track trails.

Note: this is recommended as a rear tire. To get the set, check out the front specific Flowbeist.

From 45NRTH

Let Dunderbeist loose on your local groomed single track and feel the aggressive tread claw through the snow with unrivaled propulsion and braking traction. Its 4.6” footprint provides enhanced flotation and is compatible with a wide range of frames. Dual compound rubber rolls fast and keeps you in control while shredding the berms. Point uphill and feel the Dunderbeist dig in as you attack climbs covered in loose, unconsolidated snow. Pair Dunderbeist with its sibling front tire, Flowbeist, for the ultimate combination of traction and control.


  • Rear specific design
  • 26x4.6" fat bike tire
  • For groomed winter single track and loose snow
  • Compatible with 65-102mm wide rims
  • Dual durometer rubber (60a in center for durability, 52a on sides for added cornering control)
  • 45NRTH Tubeless Ready (Folding)
  • 120tpi nylon casing