Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Rail 9.9 X01 AXS
Value Guide market data · 2021 Trek Rail 9.9 X01 AXS
12-month trend
9%
Direction and magnitude, not judgment
vs. category average
1%
Drops faster than category avg
Price over time - 2021 Trek Rail 9.9 X01 AXS
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Rail model years
2021 Rail 9.9 X01 AXS lineup
Overview
About this bike
2021 Trek Rail 9.9 X01 AXS value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame
- OCLV Mountain Carbon main frame, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, magnesium rocker link, Motor Armor, Mino Link, ABP, 150mm travel
- Fork
- RockShox ZEB Ultimate, DebonAir spring, Charger 2.1 RC2 damper, e-MTB optimzed crown, tapered steerer, 44mm offset, 15mm Maxle Stealth, 170mm travel
- Rear Shock
- NEW RockShox Super Deluxe Ultimate RT3, DebonAir spring, Thru Shaft 3-position damper, 230x57.5mm
Drivetrain
- Groupset
- 2021 Trek Rail 9.9 X01 AXS
- Crankset
- E*thirteen E*spec Race carbon, 165mm length
- Chainrings
- 15T
- Chain
- SRAM XX1 Eagle, 12 speed
- Rear Derailleur
- SRAM X01 Eagle AXS
- Cassette
- SRAM XG-1295 Eagle, 10-52, 12 speed
- Shifters
- SRAM Eagle AXS, wireless, 12-speed
Brakes
- Brakes
- SRAM Code RSC hydraulic disc w/SRAM CenterLine, 6-bolt, round-edge, 200mm rotors
Cockpit
- Headset
- Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Handlebar
- Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
- Tape/Grips
- Bontrager XR Trail Elite, alloy lock-on
- Stem
- Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length
- Saddle
- Bontrager Arvada, austenite rails, 138mm width
- Seat Post
- RockShox Reverb AXS; Small: 100mm travel; Medium: 150mm travel; Large – X-Large: 170mm travel
Wheels & Tires
- Axles
- Front: 110 x 15mm thru-axle<br>Rear: 148 x 12mm thru-axle
- Front Tire
- Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29 x 2.60''
- Rear Tire
- Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29 x 2.60''
Pedals
- Pedals
- VP-536 nylon platform
E-System
- Motor
- Bosch Performance CX, magnesium motor body, 250 watt, 75 Nm
- Battery
- Bosch PowerTube 625
- Display
- Bosch Kiox with Anti-theft solution
- Charger
- Bosch standard 4A (100-240V) charger
Accessories
- Max Assisted Speed
- 20mph / 32km/h
- Rims/Wheels
- Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver
- Color
- Solid Charcoal/Radioactive Orange / Solid Charcoal to Root Beer Ano Decal / Gloss Purple Phaze/Matte Raw Carbon
Weight & Sizing
- Size
- Small / Medium / 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
Battery health
Request battery cycle count and any diagnostic report; older packs lose range and capacity.
Inspection
Motor warranty
Verify motor warranty status and any firmware updates from the manufacturer dealer.