1
OMA33C
BOB is a company that produces high quality products which
encourage a healthy, outdoor, car-free lifestyle. In addition to
trailers, we also make a full line of strollers.
See www.bobgear.com for our complete line of products.
BOB Trailers can be attached to most bicycles with
wheel sizes between 20” and 29”. Please see the
Trailer/Bike Compatibility chart at the end of your
trailer manual to determine which trailer is compatible
with your bike. If you have questions about your wheel
diameters or trailer compatibility with your bicycle,
consult your bicycle dealer or contact BOB.
• Our trailers are intended to carry cargo only.
• Do not carry children or live animals.
• Cargo capacity: 70 pounds (32 kilograms)
• BOB Nutz must be correctly sized to your specific
bicycle to insure safe operation.
• SPEED LIMIT: 25 mph (40 kph). A bike with trailer
attached steers and feels different. Ride cautiously.
Speed wobbles (and loss of control) can occur if speed
limit is exceeded. The bike and trailer should not
be ridden at a speed greater than is reasonable and
prudent under the conditions and having regard to the
actual and potential hazards then existing.
• Some variables that can affect the control of your
bike and trailer: improper installation of BOB Nutz
/ improper installation of the Pin (shown in FIG. 7)
which holds the Trailer to the BOB Nutz / improper
installation of trailer fork to YAK & IBEX frame / road
conditions / wind speed and direction / cyclist’s skill
level / weight of rider relative to the amount of weight
in trailer / center of gravity of cargo / integrity of all
wheels (proper spoke tension and bearing adjustment).
BOB NuTz MODELS
Non IGH BOB Nutz have special Identification Grooves (FIG.
1a) that correspond to the axle size for each particular BOB
nut (Table 1). FIG. 1a and 1b also show the anatomy of BOB
Nutz which will assist you during the installation process.
FIG. 1a - BOB Nutz Anatomy
Identification Groove
2 Grooves = 3/8 x 26tpi
1 Groove = 10mm x 1
0 Grooves = 3/8 x 24tpi
Serrated Washer
Nut
Bobbin
Flat Washer
Lock Washer
M5 Bobbin Retaining
Socket Screw
FIG. 1b - BOB Nutz Anatomy - IGH (Internal Gear Hub)
Nut
Bobbin
Flat Washer
Circlip
Table 1
Model
Axle
Diameter
Thread
Pitch
Common Applications
FIG. 1a
3/8 x 24 3/8”
24 tpi
Single speed coaster brake hubs
3/8 x 26 3/8”
26 tpi
Shimano Nexus 4 and 7 speeds, Shi-
mano 3 speed coaster brakes,
English & Japanese solid axle.
10 x 1
10 mm 1mm
ISO and Japanese solid axles
FIG. 1b
IGH*
10.5
mm
1mm
Sachs multi-speed hubs with indicator
chain shifting
13/32”
26 tpi
Stutmey Archer multi-speed hubs with
indicator chain shifting
*IGH should be installed using manufacturers parts and
maintain correct axle length.
INSTALL BOB NuTz
Before attempting to attach or use your new trailer, please
read and understand these instructions completely to ensure
proper assembly and operation. If you are unclear on any
point, contact your dealer or BOB before use.
1) Measure Exposed Axle Length
With the bike dropouts fully compressed against the axle
lock nuts, measure the length of exposed axle from the outer
face of the dropout to the end of the axle (See FIG. 2). The
exposed axle length should be between the minimum and
maximum values on Table 2. Repeat this process on both
sides of the axle.
Please see your local bike
shop or contact BOB if you are unclear or cannot take
this measurement accurately.
FIG. 2 - Measure Axle Length
FIG. 6
BOB NUTZ -
INSTRUCTIONS
ENGLISH
BOB
®
Trailers, Inc. (800) 893-2447 www.bobgear.com
13501 South Ridge Drive, Charlotte, North Carolina 28273
