Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2020 Trek Session 9.9 29
Previous used estimate
$2,485 - $2,557
Actual value depends on condition, size, and local demand.
Value Guide market data · 2020 Trek Session 9.9 29
12-month projected trend
9%
Direction and magnitude, not judgment
vs. category average
8%
Drops faster than category avg
Price over time - 2020 Trek Session 9.9 29
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Session model years
2025$5,299 - $5,452▲ 113% vs. 2020
2024$3,232 - $3,325▲ 30% vs. 2020
2023$3,443 - $3,542▲ 39% vs. 2020
2022$2,913 - $2,997▲ 17% vs. 20202020$2,485 - $2,557Currently viewing
2019$2,344 - $2,411▼ 6% vs. 2020
2018$2,169 - $2,231▼ 13% vs. 2020
2017$2,103 - $2,164▼ 15% vs. 2020
2016$1,809 - $1,861▼ 27% vs. 2020
2015$1,642 - $1,689▼ 34% vs. 2020
2014$1,717 - $1,767▼ 31% vs. 2020
2013$1,723 - $1,772▼ 31% vs. 2020
2012$1,644 - $1,691▼ 34% vs. 2020
2011$1,186 - $1,220▼ 52% vs. 2020
2010$1,213 - $1,248▼ 51% vs. 2020
2009$1,197 - $1,231▼ 52% vs. 2020
2007$768 - $790▼ 69% vs. 2020
2006$831 - $855▼ 67% vs. 2020
2005$494 - $509▼ 80% vs. 2020Overview
About this bike
Session 9.9 is the pinnacle of downhill mountain bike performance. This is the same DH bike the pros ride, and it's built for one reason: going as fast as freakin' possible down hills. It pairs a SRAM X01 DH drivetrain and Code RSC brakes with our premium OCLV Mountain Carbon frame and RockShox suspension with super-fast 29" wheels. It's right for you if... You want the fastest downhill bike we offer. You want the speed of 29" wheels and the stability of a full-on DH frame. You seek out the fastest lines, and the biggest jumps. You like to dial in your ride, and want the ability to fine-tune your suspension, fit, and handling on a bike that makes no compromises. The tech you get A full OCLV Mountain Carbon frame, 190mm RockShox Boxxer Ultimate fork with plush DebonAir spring, 190mm of rear travel with a RockShox Super Deluxe Ultimate DH shock, 29er Bontrager Line DH 30 wheels, SRAM X01 DH drivetrain, SRAM Code RSC brakes, and a Bontrager Line Pro OCLV carbon handlebar. This is a full-on DH race bike, and it's built so you can refine your setup for your fastest runs with Mino Link and an adjustable fixed-angle headset. The final word Best frame, best suspension, best parts, and fast-rolling 29" wheels. This is the only choice if you're a true DH devotee. Session 9.9 is simply the fastest bike on the mountain, even when that mountain is a stop on the World Cup circuit. Why you'll love it - It's like a precision wrecking ball that gives you the confidence to tear down mountains and take the fastest, burliest lines. - The fastest runs demand the most dialed setup: the air shock and fork on Session 9.9 are adjustable and easy to fine-tune for different tracks. - Mino Link and fixed-angle headset cups let you adjust your geometry for the exact handling you want.
Specifications
- Subtype
- Downhill
- Category
- Mountain
- Component Fork
- RockShox Boxxer Ultimate, DebonAir spring, Charger 2 RC2 damper, straight steerer, 46mm offset, 190mm travel
- Component Size
- Small, Medium, Large, X-Large
- Component Stem
- Bontrager Line Pro, 35mm, Direct Mount, 50mm length
- Product Family
- Session
- Component Axles
- Front: Boost, 110x20mm Maxle Stealth Rear: 12x157mm thru axle
- Component Chain
- SRAM PC-1110, 11 speed
- Component Color
- Viper Red
- Component Frame
- OCLV Mountain Carbon main frame & stays, tapered head tube, integrated frame protection, Control Freak internal routing, magnesium rocker link, Mino Link, ISCG mount, ABP, 190mm travel
- Component Brakes
- SRAM Code RSC hydraulic disc, SRAM CenterLine, 6-bolt, round-edge, 180mm
- Component Pedals
- Wellgo MG-1, magnesium body, Cro-Mo axle, replaceable pins
- Component Saddle
- Bontrager Arvada, austenite rails, 138mm width
- Component Headset
- FSA Orbit, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Component Cassette
- SRAM PG-720, 11-25, 7 speed
- Component Crankset
- SRAM X01 DH, DUB 83, 165mm length
- Component Shifters
- SRAM X01 DH, 7 speed
- Component Handlebar
- Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
- Component Seat Post
- Bontrager Rhythm Elite, 31.6mm, 0mm offset, 330mm length
- Component Chainrings
- 36T
- Component Front Tire
- Bontrager G5 Team Issue, wire bead, 2-ply 60 tpi, 29x2.50''
- Component Rear Shock
- RockShox Super Deluxe Ultimate DH, 225x70mm
- Component Tape Grips
- Bontrager XR Trail Elite, alloy lock-on
- Component Bottom Bracket
- SRAM DUB, 83mm, BSA threaded
- Component Rear Derailleur
- SRAM X01 DH
- Rear Shock
- RockShox Super Deluxe Ultimate DH, 225x70mm
- Crankset
- SRAM X01 DH, DUB 83, 165mm length
- Pedals
- Wellgo MG-1, magnesium body, Cro-Mo axle, replaceable pins
- Bottom Bracket
- SRAM DUB, 83mm, BSA threaded
- Chain
- SRAM PC-1110, 11 speed
- Saddle
- Bontrager Arvada, austenite rails, 138mm width
- Handlebar
- Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
- Headset
- FSA Orbit, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
- Rear Derailleur
- SRAM X01 DH
- Stem
- Bontrager Line Pro, 35mm, Direct Mount, 50mm length
- Axles
- Front: Boost, 110x20mm Maxle Stealth Rear: 12x157mm thru axle
- Brakes
- SRAM Code RSC hydraulic disc, SRAM CenterLine, 6-bolt, round-edge, 180mm
- Cassette
- SRAM PG-720, 11-25, 7 speed
- Chainrings
- 36T
- Fork
- RockShox Boxxer Ultimate, DebonAir spring, Charger 2 RC2 damper, straight steerer, 46mm offset, 190mm travel
- Frame
- OCLV Mountain Carbon main frame & stays, tapered head tube, integrated frame protection, Control Freak internal routing, magnesium rocker link, Mino Link, ISCG mount, ABP, 190mm travel
- Seat Post
- Bontrager Rhythm Elite, 31.6mm, 0mm offset, 330mm length
- Shifters
- SRAM X01 DH, 7 speed
- Tape/Grips
- Bontrager XR Trail Elite, alloy lock-on
- Color
- Viper Red
- Size
- X-Large
- Front Tire
- Bontrager G5 Team Issue, wire bead, 2-ply 60 tpi, 29x2.50''
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork and rear shock service intervals and check pivot bearings for play.