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© Copyright Trek Bicycle Corporation 2005
All rights reserved
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BONTRAGER BIG EARL GRIPS
OWNER’S MANUAL
TABLE OF CONTENTS
Introduction .................................................... 1-2
Introduction
Bontrager Big Earl grips .................................... 3-6
Inspecting grips ............................................. 4
Adjusting grips ............................................. 5-6
Installation instructions ..................................... 7-9
Checking torque with Bontrager grip wrench .... 10-11
Limited Warranty ......................................... 12-13
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INTRODUCTION
Bontrager wheelsets and components are built to
exceed the demands of professionals. Pooling vast
resources, Bontrager is able to deliver cutting-edge
performance without sacrificing strength or durability.
Top level riders, including World Champions, compete
on the same product that you can purchase.
Whether leading the pack into Paris or double-jumping in Vancouver, Bontrager has you covered.
Thanks for buying Bontrager.
Please read all of the supplied instructions
thoroughly before using your Bontrager gear; the
manual contains important safety and maintenance
information. Also visit the Bontrager web site for
important updates.
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If you do not understand the information in this
manual, or you have a question about your components or wheelset that this manual does not cover,
consult your Bontrager dealer, or contact us.
Mailing address:
Bontrager Components & Wheelsets
Attn: Customer Service
801 W. Madison St.
Waterloo, Wisconsin 53594
Telephone:
In the United States, call 920.478.4678
Web or e-mail:
http://www.bontrager.com
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BONTRAGER BIG EARL GRIPS
These grips (Figure 1) have a locking mechanism
that prevents rotation or sliding, increasing control.
These high-performance grips offer these features:
• Simple locking system stops rotation
• Carbon-compatible design: will not break fibers or in
other ways damage a carbon handlebar
• Low weight: just 100 grams per pair
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Figure 1: Bontrager Big Earl grips
Grips provide your primary hand position on a
mountain-style handlebar. Their security is important
to your safety.
WARNING
Improperly adjusted or tightened grips
can cause you to lose control and fall.
Make sure the grips are positioned and
tightened properly before riding the bike.
Inspecting grips
If you are unsure of the safety of your handlebar
system, do not ride the bicycle; take the bicycle to
your dealer for adjustments.
Once a month check your grips. Attempt to rotate
them on the handlebars. If the grips slip or rotate,
tighten the grip nuts with the Bontrager grip wrench
(Figure 2). Tighten both grip nuts to 120-170 lb•in
(13.6-19.3 Nm). See page 10 for instructions on using a torque wrench with the Bontrager grip wrench.
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Figure 2: Tightening grip nut with Bontrager grip wrench
Adjusting grips
Grip position, the lateral placement of the grips
on the handlebars, is largely a matter of personal
preference blending comfort, efficiency, and balance.
Your hands should comfortably rest on the grips as
you shift, brake, or steer the bike.
To position the grips
1. Loosen the handlebar grip nut(s) of the grips,
and the clamp bolts of the controls, just enough
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that the grips and controls can be slid on the
handlebar.
2. Position the grips and controls to the desired
location.
3. Tighten the controls according to their
manufacturer’s instructions, and tighten the grip
nuts as shown in Inspecting grips.
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INSTALLATION INSTRUCTIONS
These instructions explain the steps to install new
Bontrager grips. The correct installation of grips is
critical to the rider’s safety, so this work should be
performed only by an experienced mechanic. If you
are not sure of your ability to correctly install these
grips, have them installed by your Bontrager dealer.
Check all parts for compatibility and condition before
installing. The grips interface the handlebar. These
parts must be compatible and the correct diameters
for the grips to function correctly. If you are not
sure if these grips are compatible with your bicycle,
consult your dealer.
Make sure the handlebar is in good condition before
installing grips. Look for any dents, bending, or other
deformation, and replace a damaged handlebar.
Clean the handlebar, if necessary, prior to installation.
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TO INSTALL GRIPS
1. Remove the old grips.
To remove conventional grips, lubricate the inside surface
of the grip with water or hair spray, and slide the grip
from the bar.
2. If needed, slide the controls to make room for the
Bontrager grips.
3. Slide the grips onto the handlebar.
4. Tighten the grip nuts with the Bontrager grip
Figure 3: Tighten both grip nuts equally
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wrench (Figure 3).
From either end of the grip, the threading is “normal,” so
turn clockwise to tighten.
5. Install the handlebar plugs.
6. Follow the procedures in Inspecting Grips, page 4.
Bar plug
Grip nut
Washer
Cone
Grip
Cone
Washer
Grip nut
Figure 4: Bontrager Big Earl grip parts
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CHECKING TORQUE WITH THE BONTRAGER
GRIP WRENCH
1. Attach a standard 3/8” drive torque wrench to
the matching square hole in the Bontrager grip
wrench (Figure 5).
2. Calculate the proper torque for this combination
torque wrench/ grip wrench by multiplying the
desired final torque by 0.85.
The result of your calculation takes into account the
additional length of the wrench added onto the torque
wrench.
Example:
If the desired torque value is 170 in•lb, tighten the nut
to a wrench reading of 200 in•lb (200 x 0.85 = 170).
3. Tighten the grip nut as in Inspecting Grips, page 4.
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Figure 5: Torque wrench attached to Bontrager grip wrench
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LIMITED WARRANTY
Bontrager warrants each new Bontrager component
or wheelset against defects in workmanship and
materials:
For the lifetime of the original owner• Bontrager forks
For one year• All Bontrager parts
This warranty does not cover• Normal wear and tear
• Improper assembly
• Improper follow-up maintenance
• Installation of parts or accessories not originally
intended for, or compatible with, the Bontrager
components or wheelsets as sold
• Damage or failure due to accident, misuse, abuse,
or neglect
• Labor charges for part replacement or changeover
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This warranty is void in its entirety by any modification of the wheelset, or components.
This warranty is expressly limited to the repair or
replacement of a defective item and is the sole
remedy of the warranty. This warranty extends from
the date of purchase, applies only to the original
owner, and is not transferable. Bontrager is not
responsible for incidental or consequential damages.
Some states do not allow the exclusion of incidental
or consequential damages, so the above exclusion
may not apply to you.
Claims under this warranty must be made through
an authorized Bontrager dealer. Proof of purchase
is required.
This warranty gives the consumer specific legal rights,
and those rights may vary from place to place. This
warranty does not affect the statutory rights of the
consumer.
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