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The Trek X-Caliber 7, X-Caliber 8, and X-Caliber 9 are all 27.5″ / 29″ aluminum frame hardtail crosscountry bikes. The X-Caliber 9 has better components. Explore the differences below.

2021 Trek X-Caliber 7
2021 Trek X-Caliber 8
2021 Trek X-Caliber 9
MSRP$1,099$1,329$1,649
Online Price
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CategoryCrosscountryCrosscountryCrosscountry
Weight29.5 lbs30.4 lbs29.5 lbs
FrameAluminumAluminumAluminum
ForkRockShox Judy
RockShox Judy
RockShox Judy
Wheel Size27.5″ / 29″27.5″ / 29″27.5″ / 29″
Wheel MaterialAluminumAluminumAluminum
Brake TypeHydraulic DiscHydraulic DiscHydraulic Disc
GroupsetDeore
SX Eagle
XT, SLX
Drivetrain1 × 101 × 121 × 12
Gear Range

Trek X-Caliber 7

24 mph

Trek X-Caliber 8

24 mph

Trek X-Caliber 9

26 mph
SuspensionHardtailHardtailHardtail
Front Travel100mm80mm100mm
Rear Travel---
SeatpostRigidRigidRigid
Brand Sitetrekbikes.comtrekbikes.comtrekbikes.com
Suggested Bikes

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$200$400$600$800$1,000$1,200$1,400$1,600
X-Caliber 7
X-Caliber 8
X-Caliber 9

Geometry

Specs
Frame

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

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

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

Fork

Size: S, RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, 100x5mm QR, 100mm travel; Size: M, M/L, L, XL, RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 46mm offset, 100x5mm QR, 100mm travel

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

Size: S, RockShox Judy Silver, Solo Air, TurnKey remote lockout, tapered steerer, Boost110, 15mm Maxle, 100mm travel; Size: M, ML, L, XL, XXL, RockShox Judy Silver, Solo Air spring, TurnKey remote lockout, tapered steerer, Boost110, 15mm Maxle Lite, 100mm travel

Bottom Bracket

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

Shimano SM-BB52, 73mm, threaded external bearing

Headset

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

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

Semi-integrated, sealed cartridge bearing, alloy cups, 1-1/8'' top, 1.5'' bottom

Stem

Size: 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, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length

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

Size: S, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: M, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: ML, 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

Bontrager alloy, 31.8mm, 5mm rise, 720mm width

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

Bontrager alloy, 31.8mm, 5mm rise, 720mm width

Saddle

Bontrager Arvada, steel rails, 138mm width

Bontrager Arvada, steel rails, 138 mm width

Bontrager Arvada, steel rails, 138mm width

Seatpost

Size: S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: M/L, L, XL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length

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

Size: S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: ML, L, XL, XXL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length

Grips

Bontrager XR Trail Comp, nylon lock-on

Bontrager XR Trail Comp, nylon lock-on

Groupset
Rear Derailleur

Shimano Deore M5120, long cage

SRAM SX Eagle

Shimano XT M8100, long cage, 51T max cog

Crank

Size: S, M, Shimano Deore M5100, 30T steel ring, Boost (52mm chainline), 170mm length; Size: M/L, L, XL, Shimano Deore M5100, 30T steel ring, Boost (52mm chainline), 175mm length

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

Size: S, Shimano MT611, 30T steel ring, alloy spider, Boost (52mm chainline), 170mm length; Size: S, Shimano MT610, 30T steel ring, Boost (52mm chainline), 170mm; Size: M, ML, L, XL, XXL, Shimano MT611, 30T steel ring, alloy spider, Boost (52mm chainline), 175mm length; Size: M, ML, L, XL, XXL, Shimano MT610, 30T steel ring, Boost (52mm chainline), 175mm

Shifters

Shimano Deore M4100, 10 speed

SRAM SX Eagle, 12 speed

Shimano SLX M7100, 12 speed

Cassette

Shimano Deore M4100, 11-46, 10 speed

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

Shimano SLX M7100, 10-51, 12 speed

Chain

KMC X10, 10 speed

SRAM SX Eagle, 12 speed

Shimano SLX M7100, 12 speed

Brakes

Shimano MT200 hydraulic disc

Shimano MT200 hydraulic disc

Size: S, M, ML, L, XL, XXL, Shimano hydraulic disc, MT4100 lever, MT410 caliper; Size: S, M, ML, L, XL, XXL, Shimano hydraulic disc, MT401 lever, MT400 caliper

Wheels
Rims

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

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

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

Spokes

14g stainless steel

14g stainless steel

15g stainless steel

Front Hub

Formula DC-20, alloy, 6-bolt, 100mm ThruSkew

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

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

Rear Hub

Formula DC-2241, alloy, 6-bolt, Shimano 8/9/10 freehub, Boost141, 5mm QR

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

Bontrager alloy, sealed bearing, 6-bolt, Shimano MicroSpline freehub, Boost141, 5mm QR

Tires

Size: S, Bontrager XR2 Comp, wire bead, 30 tpi, 27.5x2.20''; Size: M, M/L, L, XL, Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.20''

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''

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

Disk Rotors

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

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

Size: S, M, ML, L, XL, XXL, Shimano RT56, 6-bolt, 180mm; Size: S, M, ML, L, XL, XXL, Shimano RT56, 6-bolt, 160mm