KRUMBEIN

The Krumbein is American Classic's most aggressive gravel tire ideal for gravel roads, loose trails, and fast singletrack. The all-weather design includes tall side lugs for cornering grip on loose and rocky conditions, chamfered center knobs minimize rolling resistance, and there is plenty of space between knobs to prevent mud build-up. Combined with our signature Rubberforce G tread compounds and Stage 5S Armor construction, this tire provides impressive grip in the dirt and improves both ride quality and abrasion resistance compared to its predecessor.

FEATURES

  • Fast and efficient tire from loose gravel to single track
  • 700x40C, 700x50C, 650Bx47
  • Tubeless Ready
  • Stage 5S Armor construction
  • Rubberforce G gravel tire compound
  • Chamfered center tread minimizes rolling resistance
  • Black, tan, or brown sidewall

FEATURES

  • Fast and efficient tire from loose gravel to single track
  • 700x40C, 700x50C, 650Bx47
  • Tubeless Ready
  • Stage 5S Armor construction
  • Rubberforce G gravel tire compound
  • Chamfered center tread minimizes rolling resistance
  • Black, tan, or brown sidewall

HOOKLESS COMPATIBILITY

Some American Classic tires are compatible with hookless (Tubeless Straight-Side/TSS) rims. To be compatible, the following must be met:

  • The tire must be included in the approved section below,
  • The rim must meet current E.T.R.T.O. standards for tubeless systems, and
  • The tire must be placed on an appropriate width rim.
  • More information on hookless compatibility can be found on our Tire and Rim Compatibility page.

Approved for use:

  • Aggregate TLR
  • Kimberlite TLR
  • Krumbein TLR
  • Udden TLR
  • Wentworth TLR
  • Tectonite TLR
  • Basanite TLR
  • Vulcanite TLR
  • Mauka TLR
  • Approved for use when hookless specific maximum pressures are followed:
  • Timekeeper TLR with Stage 3S Armor
  • Torchbearer TLR with Stage 4S Armor

Not approved for use:

  • Lamplighter (all versions)
  • Timekeeper Tube-Type (all versions)
  • Timekeeper TLR with Stage 3 Flat Protection
  • Torchbearer Tube-Type (all versions)
  • Torchbearer TLR with Stage 3S Flat Protection
  • This list will be updated as additional tire models are introduced.
SKU 8G65047TL-BWN-A
Barcode # 5060914741555
Brand American Classic
American Classic Tyre Krumbein
Tyre Type Gravel
Tyre Size 650b x 47
Sidewall Brown

SPECIFICATION

  • Type                    Gravel
  • Compound        RUBBERFORCE G
  • Protection          Stage 5S Armor
  • Color Options    Black, Tan & Brown
  • Rim Fitment       Tubeless
  • TPI                       120
  • Bead                   Folding

Size Options     

  • 700x40C (ETRTO 40-622)
  • Weight: 540-545 g
  • Max Pressure: 55 PSI

 

  • 700x50C (ETRTO 50-622)
  • Weight: 670-675 g
  • Max Pressure: 50 PSI

 

  • 650Bx47mm (ETRTO 50-584)
  • Weight: 625-630 g
  • Max Pressure: 50 PSI