GT Grade Carbon 2020 Configuration guide

2020
Grade Carbon
READ THIS SUPPLEMENT AND YOUR
GT BICYCLE OWNER’S MANUAL.Both
contain important safety information. Keep
both for future reference.
Owner’s Manual Supplement

English2020 Grade Carbon - Owners’ Manual Supplement
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.
The following symbols are used in this manual:
Symbol Name Description
NGLI-2
NGLI-2 synthetic grease Apply NGLI-2 synthetic grease.
CRB-GEL
Carbon gel Apply carbon gel (friction paste) KF115/
2
Medium-strength
removable thread lock Apply Loctite® 242 (blue) or equivalent.

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CONTENTS
Safety Information.................................. 1-5
Technical Information....................... 6-15
Replacement Parts..................................16
GT Supplements
This manual is a “supplement” to your GT
Bicycle Owner’s Manual.
This supplement provides additional
and important model specic 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 GT
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:
www.gtbicycles.com
Contacting GT
GT USA
Cycling Sports Group, Inc.
1 Cannondale Way,
Wilton CT, 06897, USA
1-800-726-BIKE (2453)
Cycling Sports Group Europe B.V
Mail: Postbus 5100
Visits: Hanzepoort 27
7575 DB, Oldenzaal, Netherlands
International Distributors
Consult the following websIte to identify
the appropriate GT Dealer for your
region.
www.gtbicycles.com/usa_en/
international-distributors/
Your GT 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 GT Dealer.
NOTICE
Unauthorized service, maintenance,
or repair parts can result in serious
damage and void your warranty.

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SAFETY INFORMATION
Important Composites
Message
Your bike (frame and components) is
made from composite materials also
known as “carbon ber.”
All riders must understand a
fundamental reality of composites.
Composite materials constructed of
carbon bers are strong and light, but
when crashed or overloaded, carbon
bers 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 GT Dealer for help.
We urge you to read PART II, Section
D. “Inspect For Safety” in your GT
Bicycle Owner’s Manual BEFORE you
ride.
You can be severely injured, paralyzed
or killed in an accident if you ignore
this warning.
Inspection & Crash
Damage Of Carbon
Frames/Forks
After A Crash Or Impact:
Inspect frame carefully for damage
(See PART II, Section D. Inspect For
Safety in your
GT Bicycle Owner’s Manual. )
Do not ride your bike if you see any
sign of damage, such as broken,
splintered, or delaminated carbon
ber.
Any of the following may indicate a
delamination or damage:
· An unusual or strange feel to the
frame
· Carbon which has a soft feel or
altered shape
· Creaking or other unexplained
noises,
· Visible cracks, a white or milky
color present in carbon ber
section
Continuing to ride a damaged frame
increases the chances of frame failure,
with the possibility of injury or death
of the rider.

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Servicing
This supplement may include
procedures beyond the scope of
general mechanical aptitude.
Special tools, skills, and
knowledge may be required.
Improper mechanical work
increases the risk of an accident.
Any bicycle accident has risk of
serious injury, paralysis or death.
To minimize risk we strongly
recommend that owners always
have mechanical work done by
an Authorized GT Dealer.
Disc Brakes on Road
Bikes
Relative to conventional rim brakes,
disc brakes are less affected by water,
do not wear or heat the rims and
therefore are more consistent. Disc
brakes also may be more powerful.
To minimize risk of injury or accidents:
· Understand that road bikes have a
relatively small tire contact patch
(part of the tire that touches the
road). In order to apply the brakes
safely and effectively, you may
need more or less braking force in
different situations. You need to
take into account various road and
weather conditions that can affect
traction.
· Disc brakes are excellent, but
not some kind of magic. Take
some time riding your new disc
brake road bike in lower risk
circumstances to get used to the
feel and performance of the disc
brakes and tires.
You can be severely injured, paralyzed
or killed in an accident if you ignore
this message.
Intended Use
ASTM F2043
For o-road
riding and
jumps less than
12” (30cm)
The intended use of
all models is ASTM
CONDITION 2,
General Purpose
Riding.
Please read your GT Bicycle Owner’s
Manual for more information about
Intended Use and Conditions 1-5.

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Trainers
If you ride a trainer that requires removal
of the front wheel and clamps the fork
dropouts: Be sure your fork quick release
is tight! Relative movement will wear
parts, weaken and damage your bike.
If you ride a trainer that holds the
bike up by clamping the rear quick
release between two cones: Take off
the lightweight quick release that
came with your bike. Substitute a heavy,
classic all steel quick release and clamp
it tight! Relative movement will wear
parts, weaken and damage your bike.
Note that many modern quick releases
will not t the clamping cones in this
kind of trainer because their shapes are
incompatible.
For thru axles, make sure you follow the
trainer manufacturer instructions for the
use of any required adapters.
Be particularly cautious with a carbon
frame or fork. Carbon is relatively soft,
not abrasion resistant. If there is any
relative movement, carbon will wear
quickly.
If you ride a trainer a lot, consider using
an old bike: Corrosion from sweat will
take its toll. Weight is irrelevant. Save
wear on your expensive components.
Ask you dealer for help with trainers, the
right one and the correct way to use it.
NOTICE
TRAINERS - Improperly mounting a
bike in a trainer, or using one that is
not compatible with your particular
bike frame can cause serious damage.
WATER BOTTLES - An impact, crash,
or loose bottle cage can result in
damage to your frame.
This kind of damage is not covered by
the GT Limited Warranty.
Water Bottles
Side impacts to a water bottle or cage
can result in damage to threaded
inserts due to the leverage on a very
small area. In a crash, certainly the
last thing you should be worried about
is saving the threaded inserts in your
frame. However, when you are storing
or transporting your bike, take steps to
prevent situations where a water bottle
may be hit or bumped by a strong force
that would cause damage. Remove
bottle and cage when you are packing
your bike for travel.
Periodically check the attachment of
the bottle cage; tighten the cage bolts if
necessary. Don’t ride with a loose bottle
cage. Riding with loose cage bolts can
produce a rocking motion or vibration
of the attached cage. A loose cage will
damage the insert and possibly lead to
the inserts to pull out.
It may be possible to repair a loose insert,
or install another insert only if the frame
is undamaged. Replacement requires
the use of a special tool. If you notice
damage to the threaded insert, please
ask your GT Dealer for help.

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Building Up A Frame Set
Before building up a frame set, consult
with your GT Dealer and the component
manufacturers, and discuss your riding
style, ability, weight, and interest in and
patience for maintenance.
Make sure the components chosen are
compatible with your bike and intended
for your weight and riding style.
Generally speaking, lighter weight
components have shorter lives. In
selecting lightweight components, you
are making a trade-off, favoring the
higher performance that comes with
less weight over longevity. If you choose
more lightweight components, you must
inspect them more frequently. If you are
a heavier rider or have a rough, abusive
or “go for it” riding style, buy heavy duty
components.
Read and follow the component
manufacturers warnings and
instructions.
Tightening Torques
Correct tightening torque for the
fasteners (bolts, screws, nuts) on
your bicycle is very important to your
safety. Correct tightening torque for
the fasteners is also important for the
durability and performance of your
bicycle. We urge you to have your dealer
correctly torque all fasteners using a
torque wrench. If you decide to torque
fasteners yourself always use a torque
wrench.
Find Tightening Torque Information :
The wide range of bicycle models
and components used means that
a listing of tightening torque would
be out of date by the time it was
published. Many fasteners should
be installed with a thread locking
adhesive such as Loctite®®.
To determine correct tightening
torque and any adhesive application
for a fastener we ask you to check:
· Many components are marked.
On-product marking is becoming
common.
· Torque specs in the component
manufacturers instructions
shipped with your bicycle.
· Torque specs listed on the
websites of component
manufacturers.
· With your dealer. Dealers have
access to current data and have
experience with correct torque for
most fasteners.

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TECHNICAL INFORMATION
Item Specification
Head Tube UPR: 1-1/8 in, LWR: 1-1/4 in
Headset FSA No.44E, UPR: 1-1/8 in, LWR: 1-1/4 in
Bottom Bracket: Type / Width PF30 (sleeved) / 68 mm
Front Derailleur Brazed-on
Seat Post: Dia./Binder 27.2 mm / 31.8 mm
Min. Seat Post Insert 65 mm
Max. Seat Post Insert See page 15.
Tire Size x Max. Width 700c x 40 mm (measured)
Brakes: Mount Type / Min/Max Rotor Dia. RR: Flat Mount / 160 mm / 180 mm Only,
FR: Flat Mount / 160 mm / 180 mm Only
Axles: Type/Length FR: Maxle TA / 100 x 12 mm
RR: Syntace TA / 142 x 12 mm, M12x1, Single Lead
Intended Use: ASTM Condition 2, General Purpose Riding
Max. Weight Limit: Total 285 lbs / 129 kg (rider + all equipment)
Frame Specification
Bottom Bracket Cable Guide
2
4 N·m
M5
2
4 N·m
M5
4 mm
5 mm
mech
or Di2
Di2
3
4
5
1
2
a
1. BB Guide
2. Screw (2X)
3. DT Clamp (3X)
4. Clamp Bolt (3X)
5. Clamp Pad
a. Drain hole
Identification

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G
M
P
J
I
N
75.0
K
L
E
F
C
D
G
O
KM
H
B
P
E
J I
L
F
A
Size 48 51 55 58 62
A 45.7/18.0 49.4/19.4 53.1/20.9 56.8/22.4 60.5/23.8
B 54.5/21.5 55.9/22.0 57.4/22.6 58.7/23.1 60.2/23.7
C52.3/20.6 53.8/21.2 55.5/21.9 57.1/22.5 58.8/23.1
D70.5° *72.0° 72.3° *
E73.0° ****
E’ 73.0° ****
F72.2/28.4 75.7/29.8 78.9/31.1 82.5/32.5 85.7/33.7
G 11.9/4.7 14.5/5.7 16.2/6.4 18.7/7.4 21.0/8.3
H 102.7/40.4 104.3/41.1 104.3/41.1 105.5/41.5 107.0/42.1
I 60.8/23.9 62.3/24.5 62.4/24.6 63.4/25.0 65.0/25.6
J 43.0/16.9 * * * *
K 7.5/3.0 7.3/2.9 * 7.0/2.8 *
L 28.3/11.1 28.5/11.2 * 28.8/11.3 28.7/11.3
M** 5.5/2.2 * * * *
N** 6.8/2.7 * 5.8/2.3 5.6/2.2 5.6/2.2
O 54.7/21.5 56.9/22.4 59.1/23.3 61.3/24.2 63.5/25.0
P 37.8/14.9 38.5/15.2 39.3/15.5 39.9/15.7 40.8/16.1
* Indicates same.
** Flip Chip UN-LOADED shown, Flipping to “LOADED” position increases rake by 1.5 cm & decreases trail by 1.5 cm.
See page 10.
A Seat Tube Length
B Top Tube Horizontal
C Top Tube Actual
D Head Tube Angle
E Seat Tube Angle
(effective)
E’ Seat Tube Angle
(actual)
F Standover
G Head Tube Length
H Wheelbase
I Front Center
J Chain Stay Length
K Bottom Bracket Drop
L Bottom Bracket Height
M Fork Rake
N Trail
O Stack
PReach
Geometry
Dimensions = centimeter/inches
All Specications subject to change without notice.

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2 N·m
2
NGLI-2
1
a
1
3
5
4
4 N·m
2
2
6
1
To replace:
Remove the rear axle.
Remove the mounting screw(s) and remove
the old hanger from the dropout. Clean the
area around the dropout and inspect the
frame carefully for any cracks or damage. If
you nd damage have the frame inspected by
your GT Dealer .
If the dropout is un-damaged, apply a light
lm of grease between the frame and mount.
This will help minimize any noise or “creaking”
that might result from very slight movement
between the dropout and hanger during
movement of the derailleur.
Slide the new hanger onto the dropout. Apply
Loctite® 242 (or medium strength thread
lock) to the screw threads and tighten to the
specied torque.
Rear Derailleur Mount Front Derailleur Mount
1. RD Mount
2. Screw
a. Di2 cable exit 1. FD Mount
2. Screws (2X)
3. FD Cable Boot
4. Di2 Cap
5. Plugs for 1x
(single chain ring)
6. Di2 FD Cable Port
Serial Number
The serial number is located on the bottom
bracket. It is a 7-character barcode (1). Use
this serial number to register your bike.
To register your bike: go to the
Product Registration section of
our website at:
www.gtbicycles.com

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46mm
68mm
34.0 mm34.0 mm
1
2
3
Maintenance
In general, you should inspect the condition
of the bearings annually (at a minimum) or
anytime the crankset assembly is disassembled,
serviced, or if a problem is indicated.
To inspect, when the crankset is removed, rotate
the inner bearing race of both bearings; rotation
should be smooth, and quiet. Execesssive play,
roughness or corrossion indicates a damaged
bearing.
Removal
To avoid serious damage to the frame, it is
important to remove bearing systems very
carefully using proper tools indicated by the
manufacturer’s service instructions. Make sure
the bearings(2) (cup or adapter parts) are driven
out squarely and evenly from inside the shell!
Do not pry components from shell.
Replacement
PressFit 68mm(3) bearings are not removable
from the adapters or cup systems that are
pressed into the frame bottom bracket shell.
Therefore, damaged bearings must be removed
and replaced as new entire sets. Before
installing any new bearing units into the shell,
thoroughly clean the inside surface of the
bottom bracket shell with a clean dry shop towel.
Also, make sure both bearing units and the BB(1)
shell surfaces are clean and dry. Do not apply
grease to either.
Follow the manufacturer’s instruction for
assembly and installation of the bearing system.
Use a headset press such as Park Tool HHP-2.
See www.parktool.com/product/bearing-cup-
press-HHP-2. Select appropriate press and
adapters to ensure that force is only applied to
the cup and not the bearing inside. Press until
both cup anges are mated to the BB shell edge.
NOTICE
Consult with your GT Dealer on the quality and
compatibilty of any proposed replacement
component.
• Make sure the PressFit 68mm system is
intended for use with with a 46 mm I.D.
BB shell. Conrm actual part dimensions
with a micrometer.
• Only use a BB bearing assembly with
a sleeve (FSA, SRAM, etc.).
• Do not over-tighten PF30 cup assembly,
doing so can result in damaging frame
structure.
• Do not use chemical solvents to clean.
Do not remove frame material or use
surfacing tools on bottom bracket shell.
Frame damage, caused by improper
components, component installation
or removal is not covered by the limited
warranty.
Bottom Bracket - 68mm (PressFit)
DRIVENON-DRIVE

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Fork - Flip Chip
The fork ip chip orientation can be changed to move the front wheel axle forward
(LOADED) or rearward (UN-LOADED). The default orientation is UN-LOADED, riding
without a front load. The LOADED position is for riding with a front load, an axle position
which increases fork rake 1.5 cm to decrease trail 1.5 cm. This forward axle improves
steering response when carrying a load attached to the front end of the bicycle, for
example, the fork or handlebar.
1. When changing the Flip Chips between LOADED and UNLOADED, the brake
system components (Shimano Flat Mount Plate, Brake system parts, wheel disc)
attachment must also be changed accordingly, see next gures.
2. Use only 160mm or 180mm brake disc. Do not use a 140mm brake disc.
3. Do not install any wheel into the fork, without the Flip Chips installed.
FWD
UN-LOADED LOADED
Fork Dropout
Flip Chip

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1
6
0
m
m
1
8
0
m
m
1
2
3
1
2
3
2
3
2
3
1
6
0
m
m
1
8
0
m
m
FWD
1. Spacer (2X)
2. 140/160mm Front Flat
Mount Adapter
3. Brake Mounting Bolts (2X)
Identication
UN-LOADED
LOADED
Flip Chip - Brake System Set-Up
nt
Moutning plate
Marking orientation

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Changing the Flip Chips
NGLI-2
2
2 N·m
2
4
3
1
1
3
4
6
NGLI-2
2
5
• Determine the UN-LOADED or LOADED Flip Chip position and changes needed in
the at mount brake plate and brake disc on previous page.
• Make sure both the ip chips and the fork socket are clean and free of contami-
nants.
• Lightly grease the socket and the ip chip and re-apply thread lock to the small
screws before tightening with a torque wrench.
• Both ip chips must t into the fork socket, Flat sides facing out.
1. Flip Chip (2X)
2. Screw (2X)
3. Spacers (2X)
4. Bolts
5. Flat Mount Plate
6 . Brake Caliper
Flip Chip - Parts
Identification

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JB
FD
BAT
RD
DTW
• From the handlebar, the Di2 wire (DTW) follows the brake hose to the down tube
hole; wire goes through the hole in the underside of the down tube near the head
tube.
• Front derailleur (FD) : wire goes through hole in the side of the seat tube behind the
front derailleur mount.
• Rear derailleur (RD) : wire goes through the hole in the underside of the chain stay
near the dropout. (May need to wiggle it past the CS bond joint approximately near
the chainrings.)
• Battery (BAT): in the seat post.
• All wires join at the junction box (JB) inside the frame‘s bottom bracket shell as
usual.
Di2 Internal Routing

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Rear Fender Bridge
2
a1
b
Optional fender bridge (1) allows you to mount a compatible fender.
1. Snap the two sliding bridge pieces together using the two metal nut pieces. Orienta-
tion (shown b) of the two metal nut pieces matters: the fender bolt must pull the
threaded piece into the un-threaded piece.
2. Hook each O-ring around each side as shown, rst inside the stay, then up and over
the outside of the stay and hooked again around the bridge’s hook.
3. Assemble your fender using the threads in the metal nut. This will x the position of
the two sliding bridge pieces as well.
Installation
Assemble as shown, making sure the bridge registers in the molded at (a) on each
seat stay.

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Seat Post
Minimum Insert
The minimum insert depth the seat
post must be inserted into the frame is
65mm.
Maximum Insert
The total length of seat post that may be
inserted will vary with the frame size and
should be checked in each frame.
Frame Size (cm) Maximum Insert
(mm)
44 190
48 190
51 190
55 225
58 265
62 300
Sizing a seat post
NOTICE
Use the correct seat post length
shown above. Do not force or
bottom-out the seat post inside the
frame.
If the seat post must be cut, use the
appropriate saw blade for the seat post
material, aluminum or carbon. Lightly
sand the edges of the cut seat tube with
light sandpaper. Re-mark the minimum
insert line on the post.
BE SURE TO REMOVE ANY INSTALLED
BATTERY BEFORE CUTTING A SEAT
POST.
THE SEAT POST MUST ONLY BE CUT
BY A PROFESSIONAL BIKE MECHANIC.
Incorrectly cutting the seat post can result
in damage leading to an accident.
Maintenance
Periodically, remove the seat post and
the clamp assembly to clean, inspect for
damage and renew the application of
grease or carbon gel.
Min. 65mm
Max.
1
2
a
5mm
1. Seat Post
2. Seat Binder
a. Bottom Out limit

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REPLACEMENT PARTS
2
4 N·m
M5
2
4 N·m
M5
4 N·m
M5
2
4 N·m
M5
2
2 N·m
M3
A
F
C
B
D
D
E
G
E
H
ID Part
Number Description
A K33030 Derailleur Hanger TA ST
SS 075
BK32007 Downtube X Cable
Guides QTY 3
C K32200 BB Cable Guide E249071
D K34010 Grade Frame Grommets
QTY 5
ID Part
Number Description
E K25009 Thru Axle Flip Chips
FK33020 Grade Crb Front Derail-
leur Hanger
G K11010 Grade Crb Fender Bridge
H K32290 Grade FD Plugs

English2020 Grade Carbon - Owners’ Manual Supplement

GT USA
Cycling Sports Group,
Inc.
1 Cannondale Way,
Wilton CT, 06897, USA
1-800-726-BIKE (2453)
www.gtbicycles.com
GT EUROPE
Cycling Sports Group Europe, B.V.
Hanzepoort 27, 7570 GC, Oldenzaal,
Netherlands [phone]
[e-mail]
GT UK
Cycling Sports Group
Vantage Way, The Fulcrum,
Poole, Dorset, BH12 4NU
[phone]
[e-mail]
WWW.GTBICYCLES.COM
© 2019 Cycling Sports Group
2020 Grade Carbon Owners’ Manual Supplement
134948