Trek 2022 SESSION Operating manual

2022 SESSION
SERVICE MANUAL SUPPLEMENT

2022 Session Service Manual
1
Contents
Safety 1
Required adjustments for 27.5" wheels 2
Idler pulley 3
Rocker pivot 5
Adjust the geometry 6
Main pivot 7
Dérailleur hanger 8
Active Braking Pivot 9
Shock mounts 10
Adjust the progression 11
Frame guards 12
Cabling 13
Specications 14
Suspension 15
Safety
WARNING
Alwaystightenhardwaretothespeciedtorque.
Over-tightening hardware could deform or break the
hardware or components. Under-tightening hardware
could cause hardware or components to become loose.
Either situation could damage the bicycle and result in
injury to the rider.
WARNING
All reused-fasteners with pre-applied threadlocker must
be cleaned with isopropyl alcohol and have new thread-
locker(Loctite243orequivalent)appliedbeforere-as-
sembly. If threadlocker is not applied, the fasteners may
loosen which could damage the bicycle and result in
injury to the rider.

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Required adjustments for 27.5"wheels
The Session can accommodate:
• 27.5" front and rear wheels
• 29" front wheel and 27.5" rear wheel
When using 27.5" front and rear wheels an extended headset cup must be installed, and the rocker pivot Mino Link set to the
high position. See the Adjust the geometry section on page 6 for information about adjusting the Mino Link.
Install the extended headset cup
1
Item Description Part Number
1 Extended headset cup W5251089
Tools
• Headset cup removal tool
• Grease
1. Use the headset cup removal tool to remove the
existing cup.
2. Apply grease to the lower head tube bearing
bore.
3. Press the extended headset cup into the headset.

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Idler pulley
The idler pulley and spacers can be repositioned to align the idler pulley with the chainring. For instructions, refer to the
Adjust the position of the idler pulley section on page 4.
3
2
1
4
5
6
7
8
2
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Idler pulley 1 W1042533 —
2 Washer 2 W5251170 —
3 Idler guard bolts 2 W1052364 1
4Idler guard 2 W1052385 —
5 Spacer,black,grooved,4.5mm 1 W5251169 —
6 Spacer, 0.5mm 1 W5265886 —
7 Spacer, grey, 3.5mm 1 W5251168 —
8 Idler bolt 1 W1051961 17

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Idler pulley (continued)
Typical idler pulley and chainring alignment
With a SRAM chainring With a Shimano chainring
Adjust the position of the idler pulley
Different chainrings or slight tolerance differences in chainrings may require the idler pulley and spacers to be repositioned to
align the pulley with the chainring. To achieve alignment, do one or a combination of the following:
Flip the idler pulley. Position the 3.5mm and 4.5mm
spacers on either side of the idler pulley.
Position the 0.5mm spacer on
either side of the idler pulley.
Tools
• 6mm hex tool
• Torque wrench with 6mm hex bit
• Grease
1. Inspect the current installation to determine the
distance the idler pulley must be shifted to align with
the chainring.
2. Removetheidlerbolt(8).
3. Removetheidlerpulley(1)andspacers(5,6and7)
from the chainstay.
4. Reassemble the components, using the options
shown in the three illustrations above, to shift the
position of the idler.
Notice: When repositioning the components, all
spacersmustbeusedinthenalconguration.
5. Applygreasetotheshoulderoftheidlerbolt(8).
6. Place the assembled components into position in the
chainstay.
7. Installtheidlerbolt(8)fromthedrivesideintothe
frame.
8. Torquetheidlerbolt(8)to17Nm.

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Rocker pivot
5
6
76
5
4
3
2
8
1
2
3
4
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Rocker axle 1W1042544 —
2 Bearing 2 W302025" —
3 Spacer 2 W440921 —
4Bolt 4W1051959 17
5 Mino link bearing 2 W275322 —
6 Spacer 2 W529969 —
7 Mino Link bearing 2 W529223 —
8 Pinch bolt 2 W5256244 5
Tools
• Bearing press
• 4mmand5mmhexwrenches
• Torquewrenchwith4mmand5mmhexbits
IMPORTANT: For proper alignment of the rocker plates,
the shock must be installed and torqued, and the Mino
Link bolts installed and torqued, before the pinch bolts are
torqued.
Rocker pivot
1. Pressinthedrivesidebearing(2).
2. Apply grease to the shoulder of the drive side of
therockeraxle(1).
3. Inserttherockeraxle(1)intotheframefromthenon-
drive side.
4. Apply grease to the shoulder of the non-drive
sideoftherockeraxle(1).
5. Installthenon-drivesidebearing(2)overtheaxle.
Press the bearing in from the non-drive side.
6. Installaspacer(3)overthebearing.
7. Position the rocker plate so it aligns with the shoul-
ders of the axle.
8. Applygreasetotheshoulderofthebolt(4).
9. Install the bolt into the rocker plate. Tighten, but do
not torque the bolt.
10. Repeat steps 1–9 on the other side.
Mino Link chip
1. PresstheMinoLinkbearings(5)intotherocker
plates.
2. Position the seatstay between the rocker plates.
3. Positionaspacer(6)betweentheseatstaytaband
the rocker plate. Repeat this step with the other spac-
er on the other side.
Tip: Balancethespacer(6)againstthebearingby
partiallyinsertingthebolt(4).
4. InserttheMinoLinkchips(7)intothenotchesonthe
seatstays.
5. Insertthebolts(4)intotheMinoLinkbearings(5)on
the rocker plates.
6. Tighten,butdonottorquethebolts(4).
Pinch bolts
1. Install,butdonottightenthepinchbolts(8).
Torque all bolts
1. Torquethebolts(4)to17Nm.
2. Torquethepinchbolts(8)to5Nm.

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Adjust the geometry
FliptherockerpivotMinoLinkchiptochangethebike’sgeometrytotyourridingstyleortheterrain.FlippingtheMinoLink
chip from the high to the low position slackens the geometry by moving the head tube angle back 0.5° and lowering the bot-
tom bracket up to 9mm.
Mino Link high Mino Link low
Position the chip with the Mino Link logo to the back Position the chip with the Mino Link logo to the front
• Creates a steeper head tube angle
• Pulls in the front fork for quicker steering
• Raises the bottom bracket for improved climbing
Use this position when using 27.5"wheels or a 29"wheel
up front and a 27.5"wheel in the back.
• Creates a slacker head tube angle
• Pushes out the front fork for slower steering that is
more stable at high speed
• Lowers the bottom bracket for more stability
Tools
• 5mm hex tool
1. With the bike on the ground, loosen and remove one Mino Link chip.
2. Loosen and remove the other Mino Link chip.
3. Position the bike:
Mino Link high: Lift the bike by the seat tube. This
will pull the rear triangle up and forward.
Mino Link low: With the chips removed, gravity will
pull the rear triangle down and back.
4. Place one Mino Link chip into the desired position.
Slightly tighten the Mino Link bolt.
5. Install the other Mino Link chip into the same posi-
tion. Slightly tighten the Mino Link bolt.
6. TorquebothMinoLinkboltsto17Nm.

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Main pivot
1
2
3
4
3
2
5
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Axle 1 5256639 30
2 Spacer 2 W440921 —
3 Bearing 2 W302025" —
4Sleeve 1 5256639 —
5 Nut 1W584134 —
Tools
• Bearing press
• 8mm hex tool
• Torque wrench with 8mm hex bit
• Grease
1. Pressinthedrivesidebearing(3).
2. Insertthesleeve(4)fromthenon-driveside.
3. Pressinthenon-drivesidebearing(3).
Tip: The sleeve and bearing must be properly aligned to
allow the axle to pass through. To aid in alignment, use the
bearing press to hold the sleeve in position while pressing
in the bearing.
4. Installonespacer(2)overthenon-drivesidebearing(3).
5. Applygreasetotheshoulderoftheaxle(1).
6. Inserttheaxle(1)fromthenon-driveside.
7. Installtheotherspacer(2)overthedrivesidebearing.
8. Installthenut(5).
9. Torquetheaxleto30Nm.

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Dérailleur hanger
1
2
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Dérailleur hanger 1W583423 —
2 Hanger bolt, left-handed thread 1 25
Washer, 25mm 1
Tools
• 8mm hex tool
• Torquewrench(left-handthread)with8mmhexbit
This bicycle frame is designed to use a Universal Derailleur
Hanger(UDH).
NOTICE: The thru axle must be compatible with a UDH
and must be M12x1.0 with a 12.7mm thread.
NOTICE: Thewasherisframe-specic.Installonlythe
washer compatible with your frame.
WARNING
Do not apply grease to the derailleur hanger or bolt.
Apply grease to only the thru axle.
1. Insert the hanger on the inside of the driveside
chainstay.
2. Install the washer on the derailleur hanger bolt.
3. Insert the bolt into the frame.
4. Make sure the hanger is positioned as shown below.
5. Torquethehangerboltto25Nm.
NOTICE: Do not over-tighten. Over-tightening the bolt
could cause the hanger to break.
For additional information about the UDH, refer to the
SRAM user manual at www.sram.com.

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Active Braking Pivot
1
345
4
2
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Thru axle 1 W598581 10
2 Dropout axle 1 W5251141 15
3 Retaining ring 1 W5251279 —
4Bearing 2W583424 —
5 Non-drivesidedropout 1W583419 —
Tools
• Bearing press
• 8mm hex tool
• Torquewrench(left-handthread)with8mmhexbit
• Cassette lockring
• Grease
1. Pressinthedrivesidebearing(4).
2. Pressinthenon-drivesidebearing(4).
3. Placetheretainingring(3)overthenon-driveside
bearing.
4. Applygreasetothenon-drivesidedropout(5).
5. Installthenon-drivesidedropout(5).
6. Applygreasetothedropoutaxle(2).
7. Insertthedropoutaxle(2)intotheoutsideofthe
non-drive side.
8. Applygreasetothethreadsofthethruaxle(1),
and a lighter amount of grease to the shaft of
thethruaxle(1).
9. Insert the thru axle into the dropout.
10. Torquethethruaxleto10Nm.

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Shock mounts
1
2
3
5
4
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Upper shock bolt 1 5272748 10
2Nut 1 —
3Lower shock bolt 1
5272749
10
4Mino link spacer 1 —
5Mino Link chip 1 —

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Adjust the progression
TheshockMinoLinkchipcanbeippedtonetunetheshockperformancefortheterrainorriderpreference.
20% progression (softer) 25% progression (rmer)
Position the Mino Link chip with 20% on top
• More reactive to repeated fast mid-size bumps and
square-edge hits
Position the Mino Link chip with 25% on top
• More bottom out resistance over big hits and drops
Tools
• 6mm hex tool
• Torque wrench with 6mm hex bit
1. Make sure the Mino Links on the rocker plates are in the low position.
For instructions, see the Adjust the geometry section on page 6.
2. Remove the lower shock bolt. For the location, see the Shock mounts section on page 10.
3. Flip the shock Mino Link chip to the desired position.
4. Re-installthelowershockboltandtorqueto10Nm.

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Frame guards
1
2
3
4
5
2
6


2
Item Description Quantity in
Assembly
Part Number Torque (Nm)
1 Down tube guard 1 W1052375 —
2 Screw 6 W1052364 0.8
3 Chainstay guard 1 W1052384 —
4Brake cable adhesive scuff guard 1 W326986 —
5 Idler pulley guard 1 W1052385 —
6 Washer 2 W5265886 —
Zip tie 1 — —
Brake cable scuff guard
Use isopropyl alcohol to clean the frame surface where
theguard(4)attaches.Waitforthealcoholtodrybefore
applying the guard.
Notice: Do not clean the entire frame with isopropyl
alcohol. Isopropyl alcohol could damage the paint.

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Cabling
The Session ships with cables routed internally, but includes options for routing cables externally for quick component
changes or repairs.
Internal cable routing




1
2
6
3
Optional external cable routing




1
2
5
3
2
4
6
3
Item Description
Quantity in
Assembly Part Number Torque (Nm)
1 Rear brake cable 1 — —
2 Socket head cap screw 3 W5256244 3
3 Dual cable guide 3 W311726 —
4Flat head bolt 1 W532763 3
5 Guide assembly 1 W502054 —
6 Derailleur cable 1 — —
Zip tie location 2 — —

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Specications
Chainline (1x only)
55.5–58.5mm
Chainring (1x only)
Minimum 32T
Maximum 38T
Rear brake mount
Minimum 180mm, direct mount
Maximum 220 mm
Maximum tyre size
Notice: Measurements of actual tyres may vary. Always
verifythereissufcientclearancebetweenthetyreand
the frame. Improper tyre size could damage the bicycle
frame. Trek recommends 6mm clearance above and on
the sides of the tyre.
Wheel set Maximum tyre size
29" 29.0" x 2.60"
27.5" 27.5" x 2.60"
Combination of
29" and 27.5"
27.5” x 2.60”
Seat post
WARNING
Always follow the seatpost manufacturer’s minimum
insertion recommendation. Failure to follow the recom-
mendation could cause damage to the seatpost and
result in injury to the rider.
1
3
2
Item Measurement
1 Maximum
insertion
R1 frame 131 mm
R2 frame 167 mm
R3 frame 170 mm
2 Minimum insertion 75mm*
3 Diameter 31.6 mm
*Follow the seatpost manufacturer guidelines.
Bottom bracket
• BSA83 threaded

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Suspension
Therststepinsuspensionsetupistodeterminethesag.Allothersettingsshouldbeadjustedafterdeterminingthesag.
Refer to the suspension setup card included with your bike or the suspension calculator at Trekbikes.com/suspension-calcula-
tor.
For recommended rebound settings refer to the suspension calculator at Trekbikes.com/suspension-calculator.
Fork
WARNING
Exceeding the recommended maximum fork length could
damage the bicycle and result in injury to the rider.
2
1
3
Item Description Dimension
1Recommended sag 30 mm
2Maximum travel 203 mm
3Maximum length 29" wheels 602 mm
25.5" wheels
with extended
headset cup
installed
586 mm
Shock
Mount Width
Bottom mount 25 mm
Top mount 30 mm
1
2
3
Item Description Dimension
1Eye-to-eye length 350 mm
2Stroke length 72.5 mm
3Recommended sag 27–30%