Trek

2021 Trek X-Caliber 8

Previous used estimate

$475 - $489

Actual value depends on condition, size, and local demand.

2021 Trek X-Caliber 8

Value Guide market data · 2021 Trek X-Caliber 8

12-month projected trend

13%

Direction and magnitude, not judgment

vs. category average

4%

Drops faster than category avg

Price over time - 2021 Trek X-Caliber 8

$1.3k$776$222MSRPMSRPYr 1Yr 2Yr 3Yr 4Yr 5Yr 6Yr 7Yr 7Yr 8Yr 9Yr 10Yr 11Yr 12Yr 13Yr 14Yr 14Yr 15Yr 16Yr 17Yr 18Yr 19Yr 20Yr 20

Values based on actual sales data. Enter your bike's specifics to get a precise valuation.

All X-Caliber model years

Overview

About this bike

X-Caliber 8 is a cross country mountain bike made for fast laps and long days on the trail. It's built with special attention to value and the parts that make the biggest difference in performance. A 1x SRAM drivetrain, RockShox fork, and hydraulic disc brakes make it a great choice for new mountain bikers and XC racers searching for fast, fun, singletrack adventure. It's right for you if... You're looking for a fast mountain bike for singletrack—one that's fully capable of taking on races, marathons, and competitive group rides. You want something that is reliable and fun with dependable, lightweight parts. The tech you get A lightweight Alpha Gold Aluminum frame, a RockShox 30 Silver 100mm suspension fork with a lockout and an air spring that's lighter and more adjustable than a coil spring, tubeless ready wheels with Boost141 hub spacing, and a smooth, efficient SRAM SX Eagle 1x12 drivetrain with a wide-range cassette. The final word With X-Caliber 8, you're getting a performance frame paired with performance parts, like a RockShox air fork and 1x SRAM Eagle drivetrain. Plus, it's equipped with durable, lightweight alloy rims that save weight and are easy to upgrade to tubeless. Why you'll love it - It has the price of a more basic hardtail, but the parts and performance of a more expensive one - The RockShox air fork has a rebound adjust and can be tuned to the rider’s weight, and it’s way higher quality than what you’d normally get on an MTB at this price - The frame is fully compatible with higher-end parts, like race wheels and a dropper post, if you ever find the need to upgrade - Smart Wheel Sizing means you'll get the fastest wheel that fits (29" wheels on larger frames, 27.5" wheels on smaller frames) - The 1x drivetrain delivers a wide range of gearing with the simplicity of a single shifter

Specifications

Subtype
Cross Country
Category
Mountain
Component Fork
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110
Component Hubs
Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle Rear: Formula DCL-141Q, sealed bearing, 6-bolt, Shimano 10 freehub, Boost141
Component Size
X-Small, Small, Medium, Medium/Large, Large, X-Large, XX-Large
Component Stem
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree
Product Family
X-Caliber
Component Axles
Front: 110 x 15mm thru axle Rear: 141 x 5mm QR
Component Chain
SRAM SX Eagle, 12 speed
Component Color
Radioactive Red/Trek Black
Component Frame
Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141
Component Brakes
Shimano MT200 hydraulic disc w/Shimano RT26, 6-bolt rotors
Component Pedals
VP-536 nylon platform
Component Saddle
Bontrager Arvada, steel rails, 138mm width
Component Headset
Semi-integrated, loose ball bearing, 1-1/8'' top, 1.5'' bottom
Component Cassette
SRAM PG-1210 Eagle, 11-50, 12 speed
Component Crankset
SRAM SX Eagle, GXP, 30T steel ring, Boost
Component Shifters
SRAM SX Eagle, 12 speed
Component Handlebar
Bontrager alloy, 31.8mm, 5mm rise
Component Seat Post
Bontrager alloy, 31.6mm, 12mm offset
Component Front Tire
Size XS, S: Bontrager XR3 Comp, wire bead, 30 tpi, 27.5" x 2.20 Size M, M/L, L, XL, XXL: Bontrager XR3 Comp, wire bead, 30tpi, 29" x 2.20
Component Tape Grips
Bontrager XR Trail Comp, nylon lock-on
Component Wheel Size
27.5-inch, 29-inch
Component Bottom Bracket
Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle
Component Rear Derailleur
SRAM SX Eagle
Hubs
Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle Rear: Formula DCL-141Q, sealed bearing, 6-bolt, Shimano 10 freehub, Boost141
Crankset
SRAM SX Eagle, GXP, 30T steel ring, Boost
Pedals
VP-536 nylon platform
Bottom Bracket
Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle
Chain
SRAM SX Eagle, 12 speed
Saddle
Bontrager Arvada, steel rails, 138mm width
Handlebar
Bontrager alloy, 31.8mm, 5mm rise
Headset
Semi-integrated, loose ball bearing, 1-1/8'' top, 1.5'' bottom
Rear Derailleur
SRAM SX Eagle
Stem
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree
Axles
Front: 110 x 15mm thru axle Rear: 141 x 5mm QR
Brakes
Shimano MT200 hydraulic disc w/Shimano RT26, 6-bolt rotors
Cassette
SRAM PG-1210 Eagle, 11-50, 12 speed
Fork
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110
Frame
Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141
Seat Post
Bontrager alloy, 31.6mm, 12mm offset
Shifters
SRAM SX Eagle, 12 speed
Tape/Grips
Bontrager XR Trail Comp, nylon lock-on
Color
Radioactive Red/Trek Black
Size
XX-Large
Wheel Size
29-inch
Front Tire
Size XS, S: Bontrager XR3 Comp, wire bead, 30 tpi, 27.5" x 2.20 Size M, M/L, L, XL, XXL: Bontrager XR3 Comp, wire bead, 30tpi, 29" x 2.20

What to check when buying used

Inspection

Frame condition

Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.

Inspection

Drivetrain wear

Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.

Inspection

Service history

Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.

Inspection

Suspension service

Confirm fork and rear shock service intervals and check pivot bearings for play.

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