WTB Trail Boss Tubeless Mountain Tire (Black) (Folding) (29") (2.25") (Light/Fast w/ SG2) (TriTec)

WTB Trail Boss Tubeless Mountain Tire (Black) (Folding) (29") (2.25") (Light/Fast w/ SG2)

WTB Trail Boss Tubeless Mountain Tire Description:

Tight enough tread spacing for high speed, drag-free onslaughts yet blocky and tall enough to really dig in when it comes time to slam on the brakes. A rounded profile and staggered, supported side knobs keep clamoring for traction even as the trail loses its camber. Want to go out and own it? Be the Trail Boss.

With WTB's TriTec compound you get three compounds that provide optimal levels of traction, support and durability. A base of high durometer rubber supports the entire tread and transitions into the knobs to prevent folding or squirming. Medium stiffness center knobs cap the base layer to provide traction and durability without sacrificing rolling efficiency, while soft compound side knobs deliver maximum grip and slow rebound for increased cornering traction. 


  • Tall, tightly spaced knobs maximize braking traction and extend its longevity
  • Strategically placed siping maximizes traction when leaning the bike over
  • Tubeless Compatible System combines the ride benefits of a tubeless tire with the minimal weight of a race tire
  • Often used as a rear tire and paired with a WTB Vigilante in front
  • TriTec: TriTec combines three compounds to provide optimal levels traction support, and durability
  • SG2: SG2 protection adds a layer of puncture resistant nylon from bead to bead
  • Light Casing: TCS Light tires feature one layer of casing to minimize rotational weight while increasing the overall liveliness of a tire
  • Tough Casing: Composed of two full layers of casing, leaving no area unprotected on the TCS Tough tires
  • Fast Rolling: Long-wearing rubber designed for low rolling resistance and durability
  • Tough/Fast Rolling tires are E-25 E-bike compatible


  • Tire Type: Tubeless (Clincher)
  • Bead: Folding
  • Compound | Casing: TriTec
  • TPI (Threads Per Inch): 60 TPI
  • Puncture Protection: Tread & Sidewall
  • Inflation: -
  • Color: Black
  • Weight: 1045g (27.5" | 2.4"), 1197g (27.5" | 2.6"), 995g (29" | 2.25"), 1081g (29" | 2.4"), 1216g (29" | 2.6")

This product was added to our catalog on December 22, 2022

Tire Size Chart

Inch SizingISO / ETRTO
16" BMX / Kids305
16" Recumbent349
18" BMX / Kids355
20" BMX / Kids406
20 x 1-3/4"419
20 x 1-3/8", 20 x 1-1/8"451
22" Wheel Chair501
24" BMX / Kids507
24" BMX Race (Fractional)
24" Road
24" Old Schwinn S-7 Size521
24" Wheel Chair540
24" Old Schwinn S-5 Size547
26" Mountain559
650c Small Road Bike571
27.5 / 650b584
26 x 1-3/8590
26" Old Schwinn S-6597
700c / 29" / 28"622
27" Road (Fractional)630
28" Track Tubular635
36" Big Bike787