Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Slash 9.9 XTR
Value Guide market data · 2021 Trek Slash 9.9 XTR
12-month trend
11%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Trek Slash 9.9 XTR
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Slash model years
2025$10,695 - $12,420▲ 20% vs. 2021
2024$8,928 - $10,368▲ 1% vs. 2021
2023$9,998 - $11,610▲ 13% vs. 2021
2022$11,672 - $13,554▲ 31% vs. 20212021$8,882 - $10,314Currently viewing
2020$7,905 - $9,180▼ 11% vs. 2021
2019$6,975 - $8,100▼ 21% vs. 2021
2018$5,115 - $5,940▼ 42% vs. 2021
2017$7,440 - $8,640▼ 16% vs. 2021
2016$7,440 - $8,640▼ 16% vs. 2021
2015$7,812 - $9,072▼ 12% vs. 2021
2014$5,366 - $6,232▼ 40% vs. 2021
2013$5,468 - $6,350▼ 38% vs. 2021
2012$5,468 - $6,350▼ 38% vs. 20212021 Slash 9.9 XTR lineup
Overview
About this bike
2021 Trek Slash 9.9 XTR value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Rear Shock
- NEW RockShox Super Deluxe Ultimate, DebonAir spring, Thru Shaft 3-position damper, 230 x 62.5mm
- Fork
- RockShox ZEB Ultimate, DebonAir spring, Charger 2.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 170mm travel
- Frame
- OCLV Mountain Carbon main frame & stays, internal storage, tapered head tube, Knock Block 2.0, Control Freak internal routing, Carbon Armor, shuttle guard, threaded BB, ISCG 05, 34.9mm seat tube, magnesium rocker link, Mino Link, ABP, Boost148, 160mm travel
Drivetrain
- Groupset
- 2021 Trek Slash 9.9 XTR
- Crankset
- E*thirteen LG1 Race Carbon, Boost (55mm chainline)
- Bottom Bracket
- E*thirteen BB20-P, BSA threaded, 73mm width
- Chain
- Shimano XTR M9100, 12 speed
- Rear Derailleur
- Shimano XTR M9100, Shadow Plus, long cage, 51T max cog
- Cassette/Rear Cogs
- Shimano XTR M9100, 10-51, 12 speed
- Chainrings
- 30T
- Shifters
- Shimano XTR M9100, 12 speed
Brakes
- Brakes
- Shimano XTR M9120 4-piston hydraulic disc w/Shimano RT86, 6-bolt rotors
Cockpit
- Saddle
- Bontrager Arvada, austenite rails, 138mm width
- Headset
- Knock Block 2.0 Integrated, 67-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8" top, 1.5" bottom
- Stem
- Bontrager Line Pro, 35mm, Knock Block, 0 degree, 50mm length
- Handlebars
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 820mm width
- Seat Post
- Bontrager Line Elite Dropper, internal routing, 34.9mm
- Tape/Grips
- Bontrager XR Trail Pro, alloy lock-on
Wheels & Tires
- Tires
- Bontrager Team Issue
- Axles
- Front: 15mm thru axle<br>Rear: 12mm thru axle
Pedals
- Pedals
- Sold Separately
Accessories
- Rims/Wheels
- Front: NEW Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110<br>Rear: NEW Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148
- Color
- Carbon Blue Smoke / Lithium Grey / Factory Orange/Carbon Smoke
Weight & Sizing
- Size
- Small / Medium / Medium/Large / Large / X-Large
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.