Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2015 Trek Session 9.9 DH 27.5
Value Guide market data · 2015 Trek Session 9.9 DH 27.5
12-month trend
1%
Direction and magnitude, not judgment
vs. category average
14%
Drops faster than category avg
Price over time - 2015 Trek Session 9.9 DH 27.5
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Session model years
2025$6,975 - $8,100▼ 16% vs. 2015
2024$5,115 - $5,940▼ 38% vs. 2015
2023$6,696 - $7,776▼ 19% vs. 2015
2022$6,538 - $7,592▼ 21% vs. 2015
2020$7,440 - $8,640▼ 10% vs. 2015
2019$7,812 - $9,072▼ 6% vs. 2015
2018$7,440 - $8,640▼ 10% vs. 2015
2017$9,300 - $10,800▲ 12% vs. 2015
2016$9,300 - $10,800▲ 12% vs. 20152015$8,305 - $9,644Currently viewing
2014$8,277 - $9,6120% vs. 2015
2013$8,305 - $9,6440% vs. 2015
2012$8,305 - $9,6440% vs. 2015
2011$6,147 - $7,139▼ 26% vs. 2015
2010$5,617 - $6,523▼ 32% vs. 2015
2009$5,933 - $6,890▼ 29% vs. 2015
2007$3,255 - $3,780▼ 61% vs. 2015
2006$4,650 - $5,400▼ 44% vs. 2015
2005$2,558 - $2,970▼ 69% vs. 20152015 Session 9.9 DH 27.5 lineup
Overview
About this bike
2015 Trek Session 9.9 DH 27.5 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Fox Factory Series 40 FIT RC2, 203mm-travel
- Frame
- Trek OCLV Mountain carbon mainframe, aluminum chainstays, w/ABP DH, Full Floater and EVO link, 210mm travel
- Rear Shock
- Fox Factory Series Van RC4
Drivetrain
- Groupset
- Shimano Ultegra
- Cassette
- Shimano Ultegra, 10-speed: 11-25
- Chainrings
- 36T
- Crankset
- Shimano Saint
- Rear Derailleur
- Shimano Saint Shadow Plus
- Shifters
- Shimano Saint
Brakes
- Brake Levers
- Shimano Saint
- Brakes
- Shimano Saint disc, 8-inch rotors
Cockpit
- Handlebar
- Bontrager Rhythm Pro, carbon
- Saddle
- Bontrager Evoke 3 w/titanium rails
- Seatpost
- Bontrager Rhythm Elite
- Stem
- Bontrager Rhythm Pro
- Grips
- Bontrager Rhythm
Wheels & Tires
- Hubs
- See Rims/Wheels
- Spokes
- See Rims/Wheels
- Tires
- Bontrager G4 Team Issue, 27.5 x 2.35
- Wheel Set
- DT Swiss FR1950 Gravity Classic
Pedals
- Pedals
- Wellgo platform
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.