Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2023 Trek Rail 9.9 CXR Gen 4
Value Guide market data · 2023 Trek Rail 9.9 CXR 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 CXR 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 CXR Gen 4 lineup
Overview
About this bike
2023 Trek Rail 9.9 CXR 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
- Shock
- Rock Shox Rear Shock, Super Deluxe Thru Shaft, AirWiz, 230mm x 57.5mm, 54mm x 10mm Trunnion Upper Mounts, 40mm x 10mm Trunnion Lower Mounts, SRAM Part Number 00.4118.344.001
- 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 CXR 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*Thirteen Chainring 34 tooth, 55mm chainline, Steel, Direct Mount for Bosch, E*Thirteen Part Number CR5USM-100
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)
- 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
- 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''
- 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
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, Smart System (BES3), 4A Charger (110V), BOSCH P/N: EB12.110.000
- Motor
- Bosch, Smart System (BES3), Drive Unit, Performance Line CX Race Edition (25kph, 20mph) with Connection Plates, BOSCH P/N: EB11.100.00F
- Controller
- Bosch, Smart System (BES3), Control Intube Module BRC3100, BOSCH P/N: EB13.100.000
- Power Cable
- Bosch, Charger Power Cable, US, BOSCH P/N: 1270.020.343
- Battery Part
- Bosch Charge Socket O-Ring, 24x2mm, Rubber, Black. Bosch P/N: EB12.120.019
- Motor Part
- Bosch Lock Ring for Chainring, Performance Line, Gen 4, BOSCH P/N: 1270.014.085
Accessories
- Color
- Black; Red; Yellow; Orange
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Bike Part Misc.
- Shimano Disc Brake Adapter, SM-MA-F203P/PM
- Seat Collar
- Bontrager Seatpost Collar 36.4 Black
- Touch-Up Paint
- Paint Color: Gloss Deep Smoke, TK017-S
- Armor
- Trek Motor Armor Rail 29 Carbon Gen 4 only, black, aluminum, black
- Bar End Plug
- Bontrager Bar End Plug
- 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
- Fastener
- Bosch, Drive Unit Screw, M8 x 16mm, BOSCH P/N: 1270.016.470
- Ebike Part
- Trek-Diamant Universal Charge Port for Bosch BES3
- Electronics
- Bosch integrated speed sensor, with 750mm cable. Compatible with Bosch BES3 systems
- Stay
- Trek Chainstay Rail 29 2023 Carbon, 148x12 OLD, Paint Match Matte Deep Smoke
- Bike Part Misc
- Shimano Disc Brake Adapter, SM-MA-F203P/PM
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.