GT Force 27.5, Sensor 29 Owner's Manual

2019

Force / Sensor

READ THIS SUPPLEMENT AND YOUR
GT BICYCLE OWNER’S MANUAL. Both
contain important safety information. Keep
both for future reference.

Owner’s 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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EnglishForce / Sensor - Owners Manual Supplement

CONTENTS

Safety Information .................................... 2-6

Technical Information .......................... 7-19

Replacement Parts .............................20-21

Tightening Torques ....................................22

Maintenance ...................................................23

Notes .....................................................................24

GT Supplements

This manual is a “supplement” to your

GT 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 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:

http://www.gtbikes.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
7570 GC, OLDENZAAL, Netherlands
Tel: [phone]
Fax:[phone]

International Distributors

Consult the following websIte to
identify the appropriate GT Dealer for
your region.

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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134937 Rev 1.

SAFETY INFORMATION

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 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
fiber.

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 fiber
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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EnglishForce / Sensor - Owners Manual Supplement

Intended Use

The intended use of
all models is ASTM
CONDITION 4,
All-Mountain.

Understand your bike and its
intended use. Using your bike the
wrong way is dangerous.

Please read your GT Bicycle

Owner’s Manual for more

information about Intended Use
and Conditions 1-5.

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.

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Maximum Fork Length

Maximum Fork Length is an important frame safety testing specification for front
suspension mountain bikes. You must observe the measurement when installing
headset parts, headset adapters, installing and adjusting a fork, and selecting
replacement forks.

To Center Of
The Fork Axle

From

Bottom Of Frame

Head Tube

Maximum
Fork
Length

You must select a replacement fork not only based on head tube diameter but the
critical factor of frame maximum fork length

Do not exceed maximum fork length. Exceeding the MAXIMUM FORK LENGTH limit

can overload the frame causing it to break while riding.

Your retailer MUST follow and observe this specification for your bike. For Maximum Fork
Length specifications for GT bicycles, see www.gtbikes.com.

You can be severely injured, paralyzed or killed in an accident if you ignore this
warning.

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Tire Size x Maximum Width

Observe the Tire Size x Maximum Width for your bike found in the
“Specifications” page of this manual.

Mounting the wrong size tires can result in the tires hitting the fork or frame
when riding. If this happens, you can lose control of your bike and you can be
thrown off, a moving tire can be stopped because it touches the fork or frame.

Do not mount oversized tires, ones that rub or hit the fork or frame, ones that
result in too little clearance, or ones that can hit the fork or frame when the
suspension is fully compressed or when riding.

Take care that the tires you select are compatible with your bike’s fork or frame
design. Also, be sure to follow the manufacturer’s recommendations of your
front fork and rear shocks.

When you are considering tires for your bike consider...

The actual measured size of a tire may be different than its sidewall marking.
Each time you mount a new tire, take the time to inspect the actual clearance
between the rotating tire and all parts of the frame. The U.S. Consumer
Product Safety Commission (CPSC) requires at least 1/16” (1.6 mm) tire clearance
from any part of the bike. Allowing for lateral rim flex and a wheel or rim that
is out-of-true will likely mean choosing a rear tire that provides even more
clearance than the CPSC recommends.

Ask your dealer for the right tires for your bike and its particular components!

You can be severely injured, paralyzed or killed in an accident if you ignore
this warning.

EnglishForce / Sensor - Owners Manual Supplement

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Minimum Seat Post Insert

Make sure at least 100 mm of
the seat post is inserted into the
frame at all times.

Failure to insert the seat post at
least 100 mm can place a very
high stress on the seat tube top
tube junction causing the frame to
fail while riding.

Remove the seat post. Measure
100 mm from the bottom of
the seat post. Use a permanent
marker to mark the post at 100
mm.

When adjusting the seat post
height in the seat tube, never
adjust the seat post so that the
line you mark is above the top
edge of the seat tube.

You must also be aware that
bicycle seat posts are permanently
marked by the manufacturer with
a “minimum insert” line on the
seat post itself. You must not rely
on this marking as an indication
of the proper minimum seat post
insertion depth.

You can be severely injured,
paralyzed or killed in an accident
if you ignore this warning.

Rear Shocks

Select only compatible shocks
and forks for your bike. Do not
modify your bike in any way to
mount one.

Have your shock or fork installed
by a professional bike mechanic

Riding with the wrong rear shock
can damage the frame. You
could have a serious accident.
Make sure the total travel, eye­to-eye length, and stroke length
of the rear shock you select meet
the “Specifications” listed in this
manual.

When selecting different shocks
or forks for your bike, make sure
that the shock or fork you select is
compatible with your bike’s design
and how you will use your bike.

You can be severely injured,
paralyzed or killed in an accident
if you ignore this warning.

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TECHNICAL INFORMATION

Specifications

Item Specification

Model

Force Sensor

Wheel Size 27.5 in 29 in
Rear Travel 150 mm 130 mm
Head Tube UPR: 1-1/8 in, LWR: 1-1/2 in

Headset Integrated, 1-1/8 in - 1-1/2 in

Bottom Bracket: Type/ Width BSA / 73 mm
Front Derailleur N/A
Seat Post: Dia./Binder 31.6 mm/ 34.9 mm

Min. Seat Post Insert 100 mm
Tire Size x Max. Width

(measured)

27.5 in x 2.5 in 29 in x 2.35 in

Max. Fork Length 550 mm 540 mm

Rear Shock: Eye-To-Eye / Stroke /
Bushing Width

185 mm x 55 mm

Metric Trunnion

185 mm x 50 mm

Metric Trunnion

Sag (measured at shock) 12.5 mm 12 mm
Chain Guide ISCG 05
Rear Brake: Mount Type /

Min/Max Rotor Dia.

Post Mount / 180 mm

/ 203 mm

Rear Axle: Type/Length

Maxle TA / 148 x 12mm,

180 mm Length

Intended Use

ASTM CONDITION 4,

All-Mountain

Max. Weight Limit

Total (rider+all equipment):

305 lbs / 138 kg