Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2023 Trek Rail 9.9 XTR Gen 4
Value Guide market data · 2023 Trek Rail 9.9 XTR Gen 4
12-month trend
14%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2023 Trek Rail 9.9 XTR Gen 4
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Rail model years
2023 Rail 9.9 XTR Gen 4 lineup
Overview
About this bike
2023 Trek Rail 9.9 XTR Gen 4 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Rock Shox Front Suspension Fork, ZEB Ultimate, 29, 160mm travel, AirWiz, DebonAir Spring, Charger 3 RC2 damper, 1.8'' oversized tapered aluminum steer for eMTB with oversized crown, 44mm offset, Boost 110, Maxle Stealth, 200mm minimum rotor, SRAM Part Number 00.4020.845.000
- Cable Management
- Trek Cable Management Rail 29 Carbon 2022 Bottom Bracket Cable Grommet, a la carte, 2 Needed Per Frame for Rear Derailleur and Brake Housing, brake housing side also routes speed sensor cable; Trek Cable Management Rail Speed Sensor Grommet; Trek Internal Cable Guide, RIB Downtube, Secures up to 6 Housing, Controller, or Light Cables
- Shock
- Rock Shox Super Deluxe Ultimate RT, 230mm x 57.5mm, 54mm x 10mm Upper Shock Width, 40mm x 10mm Lower Shock Width, SRAM Part Number 00.4118.364.001
- Suspension Link
- Trek Rocker Link Rail 29 2022 Magnesium, 54mm Trunnion Mount Upper Spacing, Paint Match Matte Smoke Carbon
Drivetrain
- Groupset
- 2023 Trek Rail 9.9 XTR Gen 4
- Chain
- Shimano XTR Chain. Item Number: M9100, 12-Speed, With Quick Link (Visit si.shimano.com for compatibility, manuals and exploded views)
- Rear Derailleur
- Shimano XTR Derailleur Rear. Item Number: RD-M9100, 12-Speed, Direct Attachment, SGS Cage, Max 51T, Shadow Plus design. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Shifter
- Shimano XTR Shifter. Item Number: SL-M9100-IR, 12-Speed, Rapidfire Plus, Inner Cable Length: 2050mm, Without Optical Gear Display. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Cassette
- Shimano XTR Cassette. Item Number: CS-M9101, 12-Speed, 10-12-14-16-18-21-24-28-33-39-45-51T. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Chain Guard
- e*thirteen Chain Guide, for Bosch Gen4, with 5mm spacers for 52mm chainline, bolts directly to Bosch motor, e*thirteen part number CG3UPM-100
- Crank
- E*thirteen Crank Arms E*spec Race Carbon, 165mm length, w/Self Extractor Bolt, Black, E*Thirteen Part Number CS4LRM-102
- Chain Ring
- e-13 Chainring 34 tooth for Bosch Gen4 Motor Aluminum
Brakes
- Brake
- Shimano XTR Brake Set. Item Number: BL-M9120(L) - BR-M9120(F), Resin Pad (with Fin), Post Mount, Hose: SM-BH90-SBM, Hose length: 850mm, Compatible brake pads: K03Ti (Resin), K04Ti (Metal). (Visit si.shimano.com for compatibility, manuals and exploded views); Shimano XTR Brake Set. Item Number: BL-M9120(R) - BR-M9120(R), Resin Pad (with Fin), Post Mount, Hose: SM-BH90-SBM, Hose length: 1700mm, Compatible brake pads: K03Ti (Resin), K04Ti (Metal). (Visit si.shimano.com for compatibility, manuals and exploded views)
- Brake Rotor
- Shimano XT Disc Brake Rotor, SM-RT86, 203mm/6-Bolt, (Visit si.shimano.com for compatibility, manuals and exploded views)
- Brake Pad
- Brake Pad, Shimano D-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Brake Part
- SRAM/Rock Shox Brake Adapter Spacer 1.5mm Thick for Use on 200mm Direct Forks and Frame Mounts with 203mm Rotors, SRAM OE manufacturer's number 00.4318.013.000, aftermarket manufacturer's number 11.4018.059.000
Cockpit
- Seatpost
- Bontrager Dropper Seatpost Line Elite Oversized 34.9mm Diameter 100mm Travel
- Saddle
- Bontrager Saddle Arvada Austenite Rails Medium Black
- Handlebar
- Bontrager Handlebar Line Pro 35.0mm Clamp 780mm Width 27mm Rise Carbon
- Stem
- Bontrager Stem Line Pro, 45mm Length, 0° Rise, 35.0mm Bar Clamp Black
- Grips
- Bontrager Grips XR Trail Elite, 130mm, Black
- Headset Part
- Bontrager Headset Top Cap for Knock Block Black
- Spacer
- Trek Spacer Rail 29 Carbon 2022 size S & M Frame Water Bottle Cage Spacer, 1 per frame at the Lower Bottle Cage Nut to help cage clear the shock, Not For Use on L & XL Frames; Full Speed Ahead Knock Block Headset Spacers 10mm, Trek Proprietary Steer Stop System, 10mm x 28.6mm Steer, Must Be Paired With Trek Knock Block Headset and Bontrager Knock Block Stems
- Seatpost Part
- Bontrager Line Elite Dropper Seatpost 1x Lever, Left-hand Under bar mounted. Mounted to Matchmaker X or I-Spec mounts OE, replacement lever includes band clamp mount. Black
Wheels & Tires
- Rim Strip
- Bontrager Rim Strip Line 29 Symmetrical
- Tire
- Bontrager SE5 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.50''; Bontrager SE6 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.50''
- Front Wheel
- Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
- Rear Wheel
- Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle
- Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 184.5mm Length, Black
- Tire Part
- Bontrager TLR Tire Sealant 6 oz. Bottle; SRAM Tire Pressure Sensor TyreWiz for Bontrager Line Carbon, OE-only, SRAM part number 00.3018.255.00
Pedals
- Pedal
- VP Pedal VPE-536 Black
E-System
- Battery
- Bosch, Smart System (BES3), PowerTube 625 Battery, BOSCH P/N: EB12.100.012
- Charger
- Bosch Charger standard 4A, 230V, smart system. Bosch P/N: EB12.110.001
- Motor
- Bosch Drive Unit Performance Line CX/Cargo, Smart System (BES3). BOSCH P/N: EB11.100.001
Accessories
- Color
- Black; Red; Yellow
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Seat Collar
- Bontrager Seatpost Collar 36.4 Black
- Touch-Up Paint
- Paint Color: Gloss Deep Smoke, TK017-S
- Armor
- Trek Armor Rail Carbon Seatstay 2022, backwards compatible to 2020-2021 Rail Carbon Seatstays; Trek Armor Rail 29 2020 Chainstay Armor Black; Trek Armor Rail 29 2020 Downtube Armor Black
- Cage
- Bontrager Right Side-Load Water Bottle Cage, Matte Black
- Cover
- Trek Battery Cover Rail 29 2023 Aluminum, 625 Watt, Paint Match Matte Deep Smoke and Gloss Trek Black; Trek Charge Port Cover Rail 29 2023 Smart System, Paint Match Matte Deep Smoke
- Bell
- Trek Dome-Style Bell, Silver/Black
- Stay
- Trek Chainstay Rail 29 2023 Carbon, 148x12 OLD, Paint Match Matte Deep Smoke; Trek Seatstay Rail 29 2023 Carbon, 148x12 OLD, Paint Match Matte Deep Smoke
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.