2021 Trek X-Caliber 8

Frame

Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141, 5mm QR

BB Standard: BSA, 73mm, threaded

Tire Clearance: 2.8"
Fork

Size: XS, RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Lite, 80mm travel; Size: S, RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15mm Maxle Lite, 100mm travel; Size: M, M/L, L, XL, XXL, RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15mm Maxle Stealth, 100mm travel
Bottom Bracket

Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle
Headset

Semi-integrated, loose ball bearing, 1-1/8'' top, 1.5'' bottom
Stem

Size: XS, S, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: M, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: M/L, L, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: XL, XXL, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
Handlebar

Size: XS, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: S, M, M/L, L, XL, XXL, Bontrager alloy, 31.8mm, 5mm rise, 720mm width
Saddle

Bontrager Arvada, steel rails, 138 mm width
Seatpost

Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: M/L, L, XL, XXL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length
Groupset
Rear Derailleur

SRAM SX Eagle
Crank

Size: XS, S, SRAM SX Eagle, GXP, 30T steel ring, Boost, 170mm length; Size: M, M/L, L, XL, XXL, SRAM SX Eagle, GXP, 30T steel ring, Boost, 175mm length
Shifters

SRAM SX Eagle, 12 speed
Cassette

SRAM PG-1210 Eagle, 11-50, 12 speed
Chain

SRAM SX Eagle, 12 speed
Brakes

Shimano MT200 hydraulic disc
Wheels
Rims

Size: XS, S, M, M/L, L, XL, XXL, Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, presta valve; Size: XS, S, M, M/L, L, XL, XXL, Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, presta valve
Spokes

14g stainless steel
Front Hub

Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Rear Hub

Formula DCL-141Q, sealed bearing, 6-bolt, Shimano 10 freehub, Boost141, 5mm QR
Tires

Size: XS, S, Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.20''; Size: M, M/L, L, XL, XXL, Bontrager XR3 Comp, wire bead, 30tpi, 29x2.20''
Disk Rotors

Size: XS, S, M, M/L, L, XL, XXL, Shimano RT26, 6-bolt,160mm; Size: L, XL, XXL, Shimano RT26, 6-bolt,180mm