Which size or configuration labels have geometry for the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited?

Geometry is listed for S, M, L, and XL.

What are the reach and stack of the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited in size L?

In size L, reach is 432 mm and stack is 603 mm.

What is the head tube angle of the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited?

The head tube angle is 64.2 degrees in every size.

Which years of the Trek Session are on Quiver?

Quiver has the Trek Session for 2017, 2027, 2025, 2021, 2020, 2019, 2018, 2016, 2015, 2014, 2013, 2011, 2010, and 2005.

2017

2017 Trek Session 9.9 DH 27.5 Race Shop Limited

Downhill

The 2017 Trek Session 9.9 DH 27.5 Race Shop Limited sits at the upright end of the range for a downhill bike. Reach 389 to 456 mm, stack 603 to 603 mm. The Session 9.9 DH 27.5 Race Shop Limited build comes with Shimano Saint shifting and DT Swiss FR1950 Gravity Classic wheels.

Compare with 180+ dh bikes

Source: trekbikes.com. Checked Oct 11, 2026.

Key facts

Brand: Trek
Model: Session
Model year: 2017
Frame: 9.9 DH 27.5 Race Shop Limited
Type: Downhill
Geometry labels: S, M, L, and XL
Drivetrain: Shimano Saint
Fork: Fox 40 Factory
Wheels: DT Swiss FR1950 Gravity Classic
Geometry: Complete for every size
Source: trekbikes.com
Checked: Oct 11, 2026

Geometry by size

2017 Trek Session 9.9 DH 27.5 Race Shop Limited geometry by size
Measurement	S	M	L	XL
Reach(mm)	389	408	432	456
Stack(mm)	603	603	603	603
Head tube angle(°)	64.2	64.2	64.2	64.2
Effective top tube(mm)	570	590	614	638
Chainstay length(mm)	443	443	443	443
Wheelbase(mm)	1185	1205	1229	1253
BB drop(mm)	9	9	9	9
BB height(mm)	364	364	364	364
Standover(mm)	810	793	790	775
Seat tube length(mm)	426	426	456	456
Head tube length(mm)	115	115	115	115

How to read a geometry chart

Stock build

15 parts

Frame

Trek OCLV

Frame

Suspension

Fox 40 Factory

Fork

Drivetrain

Shimano Saint

Shifter

Shimano Saint

Derailleur

Shimano Ultegra

Cassette

Shimano XTR

Chain

Shimano Saint

Crankset

Wellgo MG-1

Pedals

Wheels & Tires

DT Swiss FR1950 Gravity Classic

Wheelset

Bontrager G4 Team Issue

Tire

Brakes

Shimano Saint

Brake

Cockpit

Bontrager Line

HandlebarMaterial Aluminum

Race Face Atlas

Stem

Seatpost & Saddle

Bontrager Rhythm Elite

Seatpost

Bontrager Evoke 3

Saddle

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Quick answers

Which size or configuration labels have geometry for the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited?: Geometry is listed for S, M, L, and XL.
What are the reach and stack of the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited in size L?: In size L, reach is 432 mm and stack is 603 mm.
What is the head tube angle of the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited?: The head tube angle is 64.2 degrees in every size.
What does the 2017 Trek Session 9.9 DH 27.5 Race Shop Limited ship with?: The stock build includes Trek OCLV, Fox 40 Factory, Shimano Saint, and DT Swiss FR1950 Gravity Classic.
Which years of the Trek Session are on Quiver?: Quiver has the Trek Session for 2017, 2027, 2025, 2021, 2020, 2019, 2018, 2016, 2015, 2014, 2013, 2011, 2010, and 2005.