Which size or configuration labels have geometry for the 2015 Trek Session Park 26?

Geometry is listed for M and L.

What are the reach and stack of the 2015 Trek Session Park 26 in size L?

In size L, reach is 423 mm and stack is 589 mm.

What is the head tube angle of the 2015 Trek Session Park 26?

The head tube angle is 64.2 degrees in every size.

What does the 2015 Trek Session 8 Park 26 ship with?

The stock build includes Trek Alpha Platinum, RockShox BoXXer, SRAM X-7, and DT Swiss FR2150.

Which years of the Trek Session are on Quiver?

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

2015

2015 Trek Session Park 26

Downhill

The 2015 Trek Session Park 26 sits more upright than most downhill bikes. Reach 398 to 423 mm, stack 588 to 589 mm. The Session 8 Park 26 build comes with SRAM X-9 shifting and DT Swiss FR2150 wheels.

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

Key facts

Brand: Trek
Model: Session
Model year: 2015
Frame: Park 26
Type: Downhill
Geometry labels: M and L
Drivetrain: SRAM X-9
Fork: RockShox BoXXer
Wheels: DT Swiss FR2150
Geometry: Complete for every size
Source: trekbikes.com
Checked: Oct 11, 2026

Geometry by size

2015 Trek Session Park 26 geometry by size
Measurement	M	L
Reach(mm)	398	423
Stack(mm)	588	589
Head tube angle(°)	64.2	64.2
Effective top tube(mm)	582	607
Chainstay length(mm)	418	418
Wheelbase(mm)	1160	1180
BB drop(mm)	21	21
BB height(mm)	364	364
Standover(mm)	754	754
Seat tube length(mm)	440	440
Head tube length(mm)	125	125

How to read a geometry chart

Stock build

16 parts

Frame

Trek Alpha Platinum

Frame

Suspension

RockShox BoXXer

ForkTravel 180 / 190 / 200mmOffset 44 / 48 / 52mm

Drivetrain

Shifter

Derailleur

CassetteSpeeds 10

ChainSpeeds 10

TruVativ Descendant DH

Crankset

Wellgo BO-87B

Pedals

Wheels & Tires

DT Swiss FR2150

Wheelset

Bontrager G4 Team Issue

Tire

Brakes

Avid Code

Brake

Cockpit

Bontrager Rhythm Elite

Handlebar

Bontrager Rhythm

Stem

FSA NO.57E

Headset

Seatpost & Saddle

Bontrager Rhythm Elite

Seatpost

Bontrager Evoke 2

Saddle

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Quick answers

Which size or configuration labels have geometry for the 2015 Trek Session Park 26?: Geometry is listed for M and L.
What are the reach and stack of the 2015 Trek Session Park 26 in size L?: In size L, reach is 423 mm and stack is 589 mm.
What is the head tube angle of the 2015 Trek Session Park 26?: The head tube angle is 64.2 degrees in every size.
What does the 2015 Trek Session 8 Park 26 ship with?: The stock build includes Trek Alpha Platinum, RockShox BoXXer, SRAM X-7, and DT Swiss FR2150.
Which years of the Trek Session are on Quiver?: Quiver has the Trek Session for 2015, 2027, 2025, 2021, 2020, 2019, 2018, 2017, 2016, 2014, 2013, 2011, 2010, and 2005.