Cannondale Lefty Ocho 120 Configuration guide

READ THIS SUPPLEMENT AND YOUR
CANNONDALE BICYCLE OWNER’S MANUAL.
Both contain important safety information. Keep
both for future reference.
Owner’s Manual Supplement
Lefty Ocho 120
English

Safety Messages
In this supplement, particularly important information
is presented in the following ways:
Indicates a hazardous situation which, if
not avoided, may result in death or serious
injury.
NOTICE
Indicates special precautions that must be
taken to avoid damage.
SYMBOLS:
NGLI-2
= Apply NGLI2 Synthetic grease
NYLON
= Suspension grease Buzzy’s Slick
Honey™ or R.S.P. Slick Kick
2
= Loctite® 242
3
= Loctite® 262
5
= Loctite® 222
N·m
= Tightening torque in Newton
meters.

3
CONTENTS
Safety Information....................47
Identification ................................ 8
Technical Information............. 921
Replacement Parts............... 2224
Maintenance ......................... 2526
Limited Warranty ....................... 27
Notes ........................................... 28
Cannondale Supplements
This manual is a “supplement” to your
Cannondale Bicycle Owner’s Manual.
This supplement provides additional and
important model specific safety, maintenance,
and technical information. It may be one of
several important manuals/supplements for
your bike; obtain and read all of them.
Please contact your Authorized Cannondale
Dealer immediately if you need a manual or
supplement, or have a question about your bike.
You may also contact us using the appropriate
country/region/location information.
You can download Adobe Acrobat PDF versions
of any manual/supplement from our website:
http://www.cannondale.com.
Contacting Cannondale
Cannondale USA
Cycling Sports Group, Inc.
1 Cannondale Way,
Wilton CT, 06897, USA
1800726-BIKE (2453)
Cycling Sports Group Europe B.V
CSG Europe (Woudenberg)
Cycling Sports Group Europe B.V.
Geeresteinselaan 57
3931JB Woudenberg
The Netherlands
PH: 00.31.541.200374
International Distributors
Consult our website to identify the appropriate
Cannondale Dealer for your region.
Your Cannondale Dealer
To make sure your bike is serviced and
maintained correctly, and that you protect
applicable warranties, please coordinate all
service and maintenance through your
Authorized Cannondale Dealer.
NOTICE
Unauthorized service, maintenance, or
repair parts can result in serious damage
and void your warranty.

4
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Safety Information
Intended Use
SAFETY INFORMATION
Intended Use
Ocho
Model
Wheel Size
Travel Length
(mm)
ASTM
Condition 3
(Symbol)
Ocho
Carbon
Ocho Alloy
29” / 120mm
Condition 3, Cross-Country, XC
INTENDED
For cross-country riding and racing,
intermediate terrain (e.g., hilly with small
obstacles like roots, rocks, loose surfaces and
hard pack and depressions, relatively short
suspension travel, supporting nimble handling
NOT INTENDED  DO NOT USE:
No large drops, drop-os, wooden structures,
or dirt embankments requiring long
suspension travel or heavy duty components
and hard landings.
For Extreme forms of jumping/riding (e.g.,
hard core mountain, Freeriding, Downhill,
North Shore, Dirt Jumping, Hucking).
No Tandems
No Motorcycles
No Engine powered vehicles
Using the Lefty the wrong way is
dangerous.
Please read your Cannondale Bicycle
Owner’s Manual for more information
about Intended Use ASTM Conditions 15,
and riding conditions defined by each.
The intended use and riding conditions
defined by on-product markings and
owner’s manual for the specific Lefty fork
model MUST match those of the frame.
A mis-match between a Lefty fork and a
frame can lead to failure of the frame or
Lefty fork. Such a failure can lead to a loss
of control, with the risk of serious injury or
death to the rider.
If you have any questions consult a
Cannondale Dealer or professional bike
mechanic with experience in Intended Use
conditions in the bicycle industry.
You can be severely injured, paralyzed
or killed in an accident if you ignore this
warning.

5
Safety Information
Important Composites Message
Important Composites
Message
Your bike (frame and components) is made
from composite materials also known as
“carbon fiber.”
All riders must understand a fundamental
reality of composites. Composite materials
constructed of carbon fibers are strong
and light, but when crashed or overloaded,
carbon fibers do not bend, they break.
For your safety, as you own and use the
bike, you must follow proper service,
maintenance, and inspection of all the
composites (frame, stem, fork, handlebar,
seat post, etc.) Ask your Cannondale
Dealer for help.
We urge you to read PART II, Section D.
“Inspect For Safety” in your Cannondale
Bicycle Owner’s Manual BEFORE you ride.
You can be severely injured, paralyzed
or killed in an accident if you ignore this
warning.
Crash/Impact Damage
Inspection
After A Crash Or Impact:
Inspect the entire bike, all parts; Look
carefully for damage. See “Inspect For
Safety” section in the Cannondale Bicycle
Owner’s Manual. See Support at www.
cannondale.com
Any of the following conditions indicate
that serious fork damage is present:
• Any “klunking,” creaking, knocking or
unexplained noises.
• A change in travel, and/or function.
• Loss of adjustment features, oil or air
leaks, or loose/broken parts.
• Crash or impact damage (cracking,
deep scratches, gouges, dents, or
bending)
• Carbon which has a soft feel or
altered shape, or broken, splintered, or
delaminated carbon fiber.)
• Visible cracks, a white or milky color
present in carbon fiber section
Continuing to ride a damaged frame /
fork increases the chances of frame /fork
failure, with the possibility of injury or
death of the rider.

6
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Safety Information
Minimum Tire-to-Crown Clearance
Minimum Tire-to-Crown
Clearance
Modification or installation of damping
cartridge/spacers other than specified; or
installing over-sized tires can result in
incorrect tire-to-crown clearance
Check minimum tire fork/frame
clearance with all air released from lefty
and fully compressed.
Measure between the top of the properly
inflated tire (1) and the bottom of the fork
crown (2).
2
1
≥ 3mm
If tire clearance is less than the minimum
specified, the rotating tire could come into
contact with with the fork crown or frame
causing the wheel to stop suddenly. This
can throw a rider o the bicycle or result in
a loss of control and crash.
Compression Assembly
55mm
1
5
2
3
4
For carbon steerer models, use only the
headset compression assembly (1)
specified for the model. See
“Specifications.”
Do not use other headset compression/
preload adjusters, shims, and do not
modify the steerer.
Do not Stack spacers (3) on top of the
stem (2) or exceed the 55 mm Maximum
Stack Height (total spacer height stacked
between the top of the head tube (5) and
the stem (2). Exceeding maximum stack
height with spacers (3) or locating spacers
on top of the handlebar stem can place
significant stress on the steerer tube (4). It
could break.
Follow the Cannondale compression
assembly installation instructions.
Use a torque wrench to tighten. Follow
stem manufacturer’s torque specifications.

7
Safety Information
Front Brake
Making External Adjustments
Make any external adjustments only when
stopped. Attempting to adjust while riding
can result in a loss of control.
You can be severely injured, paralyzed, or
killed in an accident if you ignore these
warnings.
Disassembly or Modification
Modifications can lead to serious fork
damage or serious personal injury.
Do not modify the Lefty in any way.
Use only original equipment (OE)
replacement parts. See “Replacement
Parts.”
Do not attempt damage repair yourself.
Have any required repair services or
procedures perform by an Authorized
Cannondale Dealer or Cannondale
Authorized Service Center.
You can be severely injured, paralyzed
or killed in an accident if you ignore this
warning.
Front Brake
The brake mount (1) is compatible with post
-mount type brake systems.
2
1
Before riding, make sure the StopLock
release lever is in the locked position
(shown). See “Front Wheel” removal and
installation instructions.
Follow brake manufacturer’s instructions
when mounting the brake caliper.
Do not ride without a front brake system
attached to the Lefty. A brake system
(disc/caliper) is an important secondary
wheel retention system. If the brake
system is missing or improperly installed,
and/or if the wheel hub axle bolt should
loosen, the front wheel could slide o the
spindle end.
You can be severely injured, paralyzed,
or killed in an accident if you ignore this
warning.

8
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Identification
Parts of the Ocho
18
20
7
6
11
15
19
1
2
3
10
16
5
4
21
23
22
13
12
14
9
8
17
25 26
24
Lefty 60
1. Steerer
2. Integrated crown race (carbon only)
3. Crown
4. Outer Tube
5. Inner Tube
6. Lockout, Remote
7. Compression, Dial
8. Brake Cable Guide, Upper
9. Brake Guide Tube
10. Wiper Seal
11. O-ring, travel indicator
12. StopLock Brake Mount
13. StopLock Release Lever
14. Wheel Spindle
15. Rebound Adjuster
16. Air Valve
17. Serial Number
18. Wheel Size/Travel
19. Lefty 60 Hub
20. Bolt, axle
21. Label, Warning
22. Serial Number Label
23. Compression Assembly K35009
24. Travel Length (mm)
25. Oset (mm)
26. Wheel Dia. (inches)
Parts of the Ocho
Identification

9
Technical Information
Specifications
Technical Information
Specifications
Item Specification
Carbon
Travel Length 120mm 110mm
Wheel Size 29in.
External Adjustments Air Pressure, Rebound, Compression, Lockout
Remote Compatibility “FOX 2 POS (Fox p/n 8200701250, R) Rockshox OneLoc”
Recommended Sag 25% 30mm 27.5mm
Axle-to-Crown 530mm 520mm
1Minimum Tire-to-Crown Clearance 3mm
Fork Oset 50mm
“StopLock Brake Adapter Mount
(disc dia./ adapter)
Minimum: 160mm/ K53131
Maximum: 203mm/ K53131+20mm Post Mount Adapter
Hub Compatibility Lefty 60
2Maximum Tire Size:
(Dia./Width)”
760mm x 65mm
Headset Compression Assy. Only Cannondale
p/n K35058/K35009
Maximum Stack Height 55mm
Stem Clamp Dia. 28.6mm
Steerer: Type/ Taper Length/ Overall
Length
Tapered 1.5in - 1 1/8in/ 86mm/ 330mm
Crown Race: Type/Bearing/Degree Bonded 1.5in. / 36 degree
Manual Reset Length +/- 3mm 4mm
Air Pressure Limits Minimum: 50 psi/2.4 bar
Maximum: 250 psi / 17 bar
Intended Use ASTM CONDITION 3: Cross Country, Marathon, Hardtails
Max. Weight Limit Total
(Rider+All Equipment)
305 lbs/ 138kg
Key:
- Indicates a safety related. Read and follow instructions carefully.
(1) - Measure with all air pressure released and Lefty fully compressed. “See page 6.”
(2) - The “maximum width” of a specific tire will change with the tire type/manufacturer/model. A tire width will vary across
dierent point on the tire as well as with the tire ranges of inflation pressure and while riding. This specification is only a guide. Any
installed tire, must not be able to contact the Lefty and 3mm of any part of the Lefty maintained.
Product and Specifications are subject to change without notice.

10
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Technical Information
Adjustments
Adjustments
Air Pressure
Set the initial air pressure according to your
weight (including the weight of riding gear)
based upon the following table. Then, adjust
air pressure in small amounts for your riding
preference.
Adding more air will result in a stier
suspension feel. Less air pressure will result in
a softer suspension feel. Stay within the
minimum and maximum air pressure limits.
2
1
Figure 2
To set air pressure:
1. Clean the area around the valve and the
pump end to remove dirt or contaminants.
2 Remove the valve cap (1), attach a
high-quality suspension pump to the valve
(2) .
3. Pressurize to the recommended air
pressure
4. When completed, remove the pump;
replace the valve cap.
Air Pressure/Rebound
Recommendation
RIDER WT. Air Pressure
(psi)
Rebound
(Clicks out
from slow)
Lbs Kg
120 55 68 17
130 59 81 16
140 64 94 15
150 68 107 14
160 73 120 13
170 77 132 11
180 82 145 10
190 86 158 9
200 91 171 8
210 95 184 7
220 100 197 6
230 105 209 5
Air Pressure Limits:
Minimum: 50 psi/ 3.5 bar
Maximum: 200 psi/ 13.75 bar
Air Pressure Limits:
Minimum: 50 psi/ 3.5 bar
Maximum: 200 psi/ 13.75 bar
NOTICE
• Stay within Air pressure limits.
• Attach pump only if valve and pump
are clean.

11
Technical Information
Adjustments
Sag
The rider’s position is feet on pedals with
weight shift into an “standing attack”
position. Sag is directly related air pressure
and the distributed weight of the rider on the
bike.
The Recommended Sag, found in in the
“Specification” section, is a percentage of the
full travel. Of course, the Sag % can be
adjusted to your riding preference. The
GuideGard markings (a) indicates the sag in
percent of travel.
To measure sag:
1. Pressurize the Lefty Ocho. See “Air
Pressure.”
2. Set the Lockout in the Descend mode.
See “Lockout.”
Compress the Lefty Ocho 30mm, 510
times to allow the positive and negative air
pressures to equalize.
3. Slide the O-ring (3) against the wiper seal
(4).
4. Mount bike in a standing attack position,
as shown, next figure.
Have another rider help you hold the bike
upright . Avoid bouncing the bike.
Dismount.
5. Measure the SAG as indicated by
movement of the O-ring. Corresponding
sag percentages are marked on the inside
surface of the guard.
4
3
SAG (mm)
a
To decrease sag, increase air pressure.
To increase sag, decrease air pressure.

12
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Technical Information
Rebound
Rebound
The rebound adjustment knob (3) at bottom
the of the Lefty controls the speed that Lefty
returns after being compressed.
3
Figure 4
To set rebound:
1. Rotate the adjuster (3) clockwise in the
the “SLOW” direction with your fingers
until the adjuster stops.
2. From closed, turn the adjuster counter-
clockwise toward the “FAST” direction
with your fingers and count the “clicks”
as you hear or feel them until you reach
the desired setting. See Air Pressure/
Rebound table.
To fine tune rebound:
Each click towards the “SLOW” direction
decreases rebound speed.
Each click toward the “FAST” direction
increases rebound speed
LOCKED
FAST LOCKED SLOW
Lockout
MODES:
CLIMB - In climb mode, compression
damping is significantly increased making
it more dicult to compress the
suspension unless large bumps are
encountered. Climb mode is a firmer more
ecient pedaling platform.
ACTIVE -In active mode, travel
suspension is actively absorbing changes
in terrain by compressing and extending.
Knob Lever
Use the lockout lever (4) to change between
climb and active modes.
4
Figure 4
LOCKED
ACTIVE
LOCKED
CLIMB

13
Technical Information
Compression
Handlebar Remote Lever
To set to climb mode, press the lockout paddle
(2) with your thumb until it latches in place as
shown.
2
To set to active mode, press the lockout
release (3) with your thumb. The lockout
paddle (2) will return to the position shown.
3
2
Compression
The compression adjuster (4) is the black knob
on the top of the Lefty Ocho crown. The
adjuster controls how easily the Lefty Ocho
compresses from rider input.
+
-
4
Figure 4
To adjust:
Turn the compression adjuster clockwise,
towards the +, to make the Lefty Ocho harder
to compress under rider inputs.
Turn the compression adjuster counter-
clockwise, towards the -, to make the Lefty
Ocho easier to compress under rider inputs.
NOTICE
Do not force the adjuster past the stops.
Forcing the adjuster beyond the stops will
damage the damper internals.

14
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Technical Information
Set-Up Steps
Set-Up Steps
Follow these steps in order, to set-up the Lefty
1. Set Lockout to Active mode.
2. Set the Air Pressure.
3. Check Sag. Adjust sag as necessary.
5. Set the Rebound.
5. Set the Compression.
Front Wheel
Removal
1. Secure the bike in a work stand with the
front wheel o the ground slightly.
2. Rotate the StopLock release lever (1) 180
degrees so it is pointing downward
(un-locked).
Figure 5
3. Pull the brake mount with attached brake
caliper backwards until caliper is clear of
the brake rotor.
LOCKED
UNLOCKED

15
Technical Information
Front Wheel
Figure 6
(brake caliper not shown)
NOTICE
• Do not allow the brake to hang by the
brake line.
• Support the removed brake mount/
caliper to prevent damage of the brake
system while it is detached.
4. Insert a 5mm hex key into the Lefty hub
axle bolt on the drive side of the bike.
Turn the axle bolt counter-clockwise.
Continue turning until the axle bolt is
completely disenagaged from the spindle.
Figure 7
NOTICE
• Make sure the axle bolt is completely
disengaged before attempting to
remove the wheel.
• Never pull the wheel o forcefully. If
the axle bolt is still engaged this will
damage the threads.
5. Slide the wheel o the spindle end.
Important:
While the wheel is o, take steps to prevent
damage to the spindle .
Allow the bike to remain in the stand until the
wheel is re-installed.
Likewise, while the wheel is removed, be sure
to protect the wheel, hub, and brake rotor from
damage or contamination. Cover the hub
opening to prevent contamination of the inside
of the hub.

16
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Technical Information
Front Wheel
Installation
1. With bike in a work stand, clean the
spindle (1), and axle threads (a). Apply
light grease to the threads (a) and outer (b)
and inner (c) hub bearing lands.
a
b
c
NGLI-2
NGLI-2
NGLI-2
NGLI-2
1
Figure 8
3. Check the inside of the Lefty wheel hub for
dirt or contamination, wipe clean if
necessary. Apply light grease to the hub
bearing inner races.
4. Align and slide the wheel straight on to the
spindle. Using a 5 mm hex key by hand,
start engagement of the axle bolt to a few
threads to confirm correct thread
engagement. Once confirmed, tighten
the axle bolt to
15 N·m with a torque wrench.
6. With the StopLock release lever turned
down, slide the brake mount/caliper into
the Lefty.
As you do this, make sure the brake rotor
locates between the brake pads.
7. With the brake mount firmly seated to the
Lefty, turn the StopLock release lever up
to lock the brake adapter/caliper onto the
lower leg.
LOCKED
LOCKED
Figure 10

17
Technical Information
Front Wheel
8. Spin the wheel to make sure it rotates
freely.
9. Be sure to test the brakes for proper
function before riding.
Use a torque wrench to tighten.
Prevent grease contamination of brake
caliper, pads and brake rotor.

18
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Technical Information
Remote Lockout Setup
Remote Lockout Setup
1. Cut a length of 4mm derailleur housing (1) to
extend between the handlebar lockout remote
lever and remote housing (2) stop. Install an
inline barrel adjuster 2030mm from the lever
end.
2. Set handlebar lockout remote to Descend
mode.
3. Remove compression knob screw (9) and lift
o the compression knob (8) to expose the
lockout pulley (3).
4. At the lockout lever, feed the shift cable (4) end
through to the remote housing. Pull the cable
tight to seat the housing in the housing stop.
5. Loosen anchor bolt (5) and feed the cable
under the bolt and in the channel as shown.
1
3
4
2
2mm
5
6. Pull the cable tight and tighten the anchor bolt
(5) to 0.25Nm.
5
6
0.25 N·m
7. Use the barrel adjuster to remove cable slack.
8. Trim the cable 30mm from the cable anchor bolt,
install a cable crimp (6) and tuck the cable into
the pulley pocket as shown. The cable end must
not protrude above the lockout pulley. This will
interfere with the compression adjuster knob.
9. Lubricate the adjuster seal (7) with 5W or lighter
suspension oil. Do not use grease
10. Insert the compression adjuster knob (8) over
the splines (a) on the compression rod. Lightly
tighten the compression knob screw (9). Rotate
the compression adjuster knob fully clockwise then
fully counter clockwise to seat the compression
adjuster seal.
a
7
5W
8
0.85 N·m
9
11. Hold the compression adjuster knob
stationary with your fingers, tighten the screw (9)
to 0.85 Nm.
NOTICE
Over-tightening the screw (9) will result in compression
knob being dicult to turn or damage.

19
Technical Information
GuideGuard
5 N·m
2
2
1 N·m
1 N·m
1
2
3
4
6
5
7
9
8
GuideGuard
The GuideGuard (6) and protects the Lefty lower leg
from damage and the C-tube (3) supports the brake
line.
Periodically, check the GuideGuard and C-tube to
make sure they are in good condition and attached
properly with the mounting screws.
NOTICE
Do not ride, stop riding if parts are missing or
damaged.
Replace both the Guide-Guard (6) parts or
C-tube (3) with a new ones.
Replacement
1. Place the bike in a workstand and remove the
front wheel. See “Wheel Removal.”
2. Insert a 4mm hex key through the drive- side of
the Lefty spindle until into the head of the fixing
bolt (8). Turn counter-clockwise and remove
the bolt from the spindle end.
3. Lift the upper rubber clip (1) holding the guide
(3) to the clip mount (2) of the Lefty.
4. Remove the small fixing screw (7). Release the
brake line from within the guard tube (3) and
remove the guard (6) and attached C- tube (3)
from the Lefty.
5. See “Replacement Parts.”
Fit the new parts to the Lefty in reverse order.
Apply Loctite where indicated and tighten all
fasteners to the specified tightening torque.

20
Lefty Ocho 120 Owner’s Manual
138227 Rev 1 01/21)
Technical Information
Brake Hose Routing
Brake Hose Routing
1. Loosen the 2.5mm hex bolt at the top of the
GuideGuard so the hose clamp can move freely.
Let the hose clamp hang downwards.
2. Route the brake hose through the channel at
the top of the GuideGuard. Rotate the hose
clamp so it covers the brake hose. Torque and
the hose clamp to 1.5Nm with a 2.5mm hex
wrench.
1.5 N·m
3. Check the brake hose and ensure that it does
not contact the Lefty lower leg, brake rotor or
wheel spokes.
a. If the brake hose contacts the Lefty lower leg,
remove the StopLock brake mount, rotate
the brake caliper 360 degrees clockwise and
reinstall the brake mount.
b. If the brake hose contacts the brake rotor or
wheel spokes, adjust the brake banjo angle
and/or loosen the hose clamp and draw more
brake hose above the GuideGuard.
4. Unclip the upper cable guide from the fork by
pushing it upwards.
5. Clip the bottom end of the C-tube over the
brake hose. Slide the C-tube downwards until
it bottoms out on the GuideGuard then clip
onto brake hose.
6. Insert the brake hose through the split in the
back of the upper cable guide. Insert the upper
cable guide into the base and push down to
fully seat it.