Which size or configuration labels have geometry for the 2013 Trek Session?

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

What are the reach and stack of the 2013 Trek Session in size L?

In size L, reach is 423 mm and stack is 609 mm.

What is the head tube angle of the 2013 Trek Session?

The head tube angle is 64.2 degrees in every size.

What does the 2013 Trek Session 8 ship with?

The stock build includes Trek Alpha Platinum, RockShox BoXXer, SRAM X7, and Sun Ringlé ADD Comp.

Which years of the Trek Session are on Quiver?

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

2013

2013 Trek Session

Downhill

The 2013 Trek Session sits at the upright end of the range for a downhill bike, with a longer rear center. Reach 383 to 444 mm, stack 605 to 609 mm. The Session 8 build comes with SRAM X-9 shifting and Sun Ringlé ADD Comp wheels.

Compare with 170+ dh bikes

Source: trekbikes.com. Checked Oct 12, 2026.

Key facts

Brand: Trek
Model: Session
Model year: 2013
Type: Downhill
Geometry labels: S, M, L, and XL
Drivetrain: Varies by build
Fork: Varies by build
Wheels: Varies by build
Geometry: Complete for every size
Source: trekbikes.com
Checked: Oct 12, 2026

Geometry by size

2013 Trek Session geometry by size
Measurement	S	M	L	XL
Reach(mm)	383	398	423	444
Stack(mm)	605	609	609	609
Head tube angle(°)	64.2	64.2	64.2	64.2
Effective top tube(mm)	566	582	607	627
Chainstay length(mm)	439	439	439	439
Wheelbase(mm)	1166	1181	1206	1227
BB drop(mm)	21	21	21	21
BB height(mm)	364	364	364	364
Standover(mm)	780	780	780	780
Seat tube length(mm)	413	440	440	487
Head tube length(mm)	120	125	125	125

How to read a geometry chart

Stock build

Session 815 parts

Frame

Trek Alpha Platinum

Frame

Suspension

RockShox BoXXer

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

Drivetrain

SRAM X7

ShifterSpeeds 10

SRAM X-9

Derailleur

SRAM PG-1050

CassetteSpeeds 10

TruVativ Descendant DH

Crankset

Wellgo BO-87B

Pedals

Wheels & Tires

Sun Ringlé ADD Comp

Wheelset

Bontrager G4 Team Issue

Tire

Brakes

Avid Code

Brake

Cockpit

Bontrager Rhythm Elite

Handlebar

TruVativ Holzfeller

Stem

FSA NO.57E

Headset

Seatpost & Saddle

Bontrager Rhythm Elite

Seatpost

Bontrager Evoke 1

Saddle

Keep your Session 8 in Quiver

Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.

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Session 8815 parts

Frame

Trek Alpha Platinum

Frame

Suspension

Fox Factory

Fork

Drivetrain

SRAM X9

ShifterSpeeds 10

SRAM X-0

Derailleur

SRAM PG-1050

CassetteSpeeds 10

SRAM Descendant DH

CranksetChainring interface Integrated

Wellgo MG-1

Pedals

Wheels & Tires

Sun Ringlé ADD Expert

Wheelset

Bontrager G4 Team

Tire

Brakes

Avid CODE 9

Brake

Cockpit

Bontrager Rhythm

Handlebar

TruVativ Holzfeller

Stem

FSA NO.57E

Headset

Seatpost & Saddle

Bontrager Rhythm Elite

Seatpost

Bontrager Evoke 2

Saddle

Keep your Session 88 in Quiver

Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.

Free on App Store Free on Google PlayFree for your first bike, on iPhone and Android.

Already have Quiver? Open this build

Sources agreeManufacturer

Keep the factory build and your current parts distinct

Quick answers

Which size or configuration labels have geometry for the 2013 Trek Session?: Geometry is listed for S, M, L, and XL.
What are the reach and stack of the 2013 Trek Session in size L?: In size L, reach is 423 mm and stack is 609 mm.
What is the head tube angle of the 2013 Trek Session?: The head tube angle is 64.2 degrees in every size.
What does the 2013 Trek Session 8 ship with?: The stock build includes Trek Alpha Platinum, RockShox BoXXer, SRAM X7, and Sun Ringlé ADD Comp.
Which years of the Trek Session are on Quiver?: Quiver has the Trek Session for 2013, 2027, 2025, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2011, 2010, and 2005.