Origin8 Pro Fit Alloy Road & Mountain Stem 31.8mm, 90mm, +/-17 Type_L3 the Surly Dirt Wizard is

the Surly Dirt Wizard is the perfect companion for trail riders seeking aggressive traction and control

the Donnelly BOS is built for riders who demand performance in muddy

this tire offers confidence-inspiring grip and safety in wet conditions

and comfort tailored for active outdoor adventures

Durable all-metal construction combining steel and alloy

Origin8 Pro Fit Alloy Road & Mountain Stem 31.8mm, 90mm, +/-17 Type_L3 the Surly Dirt Wizard isSTEM OR8 PROFIT 3D 90x31. 8x28. 6 + 17d SL Available in a variety of lengths, angles, and bar bores for the perfect fit Road or Mountain compatible 3D forged AL6061 T6 alloy construction 40mm stack height 4 bolt front loading one piece faceplate design ISO Mountain safety certified