Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2023 Trek Slash 9.9 XX1 Flight Attendant Gen 5
Value Guide market data · 2023 Trek Slash 9.9 XX1 Flight Attendant Gen 5
12-month trend
13%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2023 Trek Slash 9.9 XX1 Flight Attendant Gen 5
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▲ 7% vs. 2023
2024$8,928 - $10,368▼ 11% vs. 2023
2023$9,998 - $11,610Currently viewing
2022$11,672 - $13,554▲ 17% vs. 2023
2021$8,882 - $10,314▼ 11% vs. 2023
2020$7,905 - $9,180▼ 21% vs. 2023
2019$6,975 - $8,100▼ 30% vs. 2023
2018$5,115 - $5,940▼ 49% vs. 2023
2017$7,440 - $8,640▼ 26% vs. 2023
2016$7,440 - $8,640▼ 26% vs. 2023
2015$7,812 - $9,072▼ 22% vs. 2023
2014$5,366 - $6,232▼ 46% vs. 2023
2013$5,468 - $6,350▼ 45% vs. 2023
2012$5,468 - $6,350▼ 45% vs. 20232023 Slash 9.9 XX1 Flight Attendant Gen 5 lineup
Overview
About this bike
2023 Trek Slash 9.9 XX1 Flight Attendant Gen 5 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Rock Shox ZEB Ultimate Flight Attendant, 29, 170mm travel, Charger 2.1 RCT3 AXS Damper, 1.5'' Mountain standard tapered steer, 44mm offset, Boost 110, Maxle Stealth, 200mm minimum rotor, SRAM Part Number 00.4020.606.020
- 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
- Cable Management
- Trek Cable Management MTB BB Cable Exit Guide First Used on MY20 Fuel EX Carbon
- Frame Part
- Trek Slash 29 2021 Carbon Thru Shaft Grommet
- Shock
- Rock Shox Rear Shock Super Deluxe Ultimate Flight Attendant, 230mm x 62.5mm, 54mm x 10mm Upper Shock Width, 40mm x 10mm Lower Shock Width, SRAM Part Number 00.4118.297.377
- Suspension Link
- Trek Rocker Link Slash 29 2022 Magnesium, Paint Match Matte Deep Smoke
Drivetrain
- Groupset
- 2023 Trek Slash 9.9 XX1 Flight Attendant Gen 5
- Bottom Bracket
- SRAM External Bottom Bracket, DUB BSA 73mm for MTB Wide, Use SRAM DUB Outer Spacers for proper configuration, SRAM part number 00.6418.010.013
- Chain
- SRAM Chain XX1 Eagle with Powerlink, 12-Speed, 114 Links, Rainbow, SRAM Part Number 00.2518.039.003
- Rear Derailleur
- SRAM Rear Derailleur XX1 AXS 12-Speed, SRAM Part Number 00.7518.117.010
- Shifter
- SRAM Rear Shifter XX1 AXS 2-Button, Right Hand, SRAM Part Number 00.3018.284.001; SRAM Eagle AXS, wireless, 12 speed, left hand shifter pod, SRAM part number 00.3018.283.001
- Cassette
- SRAM Cassette 1299 Eagle 12 Speed, 11-52, Rainbow, SRAM Part Number 00.2418.101.002
- Derailleur Hanger
- SRAM Derailleur Hanger Universal Derailleur Hanger, with 30mm Diameter Washer for Trek ABP Full Suspension Models
Brakes
- Brake Rotor
- SRAM disc brake rotor, HS2 rounded, 180mm, 6-bolt, SRAM part number 00.5018.174.001; SRAM HS2 Brake Rotor, 200mm, 6-Bolt, Stainless Steel, SRAM Part Number 00.5018.174.002
- Brake Set
- SRAM Code RSC Hydraulic Disc Brake, 4-piston, Black, 1700mm Hose Length, SRAM Part Number 92.5020.151.260; SRAM Code RSC Hydraulic Disc Brake, 4-piston, Black, 800mm Hose Length, SRAM Part Number 92.5020.140.080
Cockpit
- Seatpost
- Rock Shox Dropper Seatpost Reverb AXS 34.9mm Diameter 100mm Travel, SRAM Part Number 00.6818.039.008
- Saddle
- Bontrager Saddle Arvada Austenite Rails Medium Black
- Headset
- Trek Headset Knock Block with 72-Degree Turning Radius First Used on Slash 29 2021 with Display Tabs on Frame Chip
- Grips
- Bontrager Grips XR Trail Pro 130mm Black
- Headset Part
- Trek Headset Upper Assembly Knock Block 72-degree Bearing Cover, Frame Chip with display mount tabs, and Bolt only. Bearings available separately; Bontrager Headset Top Cap for Knock Block Black
- Spacer
- 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
- Stem Part
- Bontrager Stem Part for RSL Integrated handlebar/stem shim for Knock Block headsets
- Integrated Bar Stem
- Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 35mm length
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, SRAM XD driver, Boost148, 12mm thru axle
- Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 198.5mm Length, Black
- Tire Part
- Bontrager TLR Tire Sealant 6 oz. Bottle
- Valve
- Bontrager TLR Valve, 50mm, Black
E-System
- Battery
- SRAM eTap Battery Pack w/ Charger, SRAM PN 00.3018.201.001
Accessories
- Color
- Black; Yellow; Greendark
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Seat Collar
- Bontrager Seat Collar 39.7mm For MTBs with 34.9mm Seatposts
- Touch-Up Paint
- Paint Color: Matte Deep Smoke, TK017-S
- Armor
- Trek Slash 29 2021 Upper Downtube Armor, Sizes S, M, & M/L; Trek Slash 29 2021 Lower Downtube Armor, One Size Fits All; Trek Slash 29 2021 Chainstay Armor; Trek Slash 29 2021 Seatstay Armor
- Bag
- Bontrager Bits Bag For Storage Door, Black
- Cover
- Trek Storage Door Slash 29 2023 painted cover with assembled lever & latch mechanism, no bottle cage, Paint Match Matte Deep Smoke and Anodized Black Lever
- Fastener
- Bontrager Stem Pinch Bolt, M5 x 20mm, Titanium; Trek Fastener M4x0.7x16mm Flat Head Countersunk 3mm Hex Driver For Use with Knock Block Frame Chip and Control Freak Cable Management, quantities needed vary by bike model
- Nut
- Bontrager Stem D-nut for XXX stems and RSL integrated bar/stems, Only available in a kit with matching M5 fasteners
- Stay
- Trek Chainstay Slash 29 2023 Carbon, 148x12 OLD, Paint Match Matte Deep Smoke; Trek Seatstay Slash 29 2023 Carbon, 148x12 OLD, Paint Match Matte Deep Smoke
- Bike Part Misc
- MRP Chainguide AMG CS ISCG 05 26-32t chainrings, MRP Part Number MR-20-21-205
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.