Beat the cold rush.
Don't get caught by the cold freeze. Bring your boat to be winterized by a
professional. No appointment needed.
Don't forget about your trailer!
If you don't service your trailer in the fall it needs to be serviced in the spring. The
trailer bearings need to be cleaned, inspected, and re-packed with fresh grease and new
TRAILER TIRE SPECIFICATIONS
Proper wheel selection is a very important component of your trailer gear system. When
replacing your trailer tires/rims it is critical that the proper size and load range be
selected in order to match the load requirements of the trailer. The following
characteristics are extremely important and should be thoroughly checked when replacing
* TIRE CONSTRUCTION TYPE - Bias Ply vs. Radial
* TIRE APPLICATION TYPE - (ST) Special Trailer vs. (P) Passenger Car
* TIRE SIZE - % of section height / section width Refereed to as 'Aspect Ratio'
* TIRE LOAD RANGE - Load carrying capacity and air pressure rating
* RIM SIZE - Diameter and width must match tire
* RIM BOLT CIRCLE - Diameter of bolt circle must match hub
Quite often consumers are uncertain how to read or interpret specifications on a tire side
wall. This problem is compounded by the Trailer Tire Industry's use of three different
size identification systems on trailer tires. The following are examples and explanations
of tire code.
* THE NUMERIC SYSTEM - (4.80 X 8) mostly used on smaller trailer tires, indicates the tire
section width (4.80"), and the rim diameter (8")
* THE ALPHA NUMERIC SYSTEM - (B78 X 13 C) common on 13"-15" trailer tires,
indicates air chamber size (B), the 'Aspect Ratio' (78), the rim diameter (13"), and
the load range (C)
* THE METRIC SYSTEM - (ST205 75D 15) currently being phased in by trailer tire
manufacturers, indicated the tire application type (ST-special trailer), the section width
(205mm), the 'Aspect Ratio' (75), the construction type (D= bias ply), and rim
Proper rim selection is also important to assure replacement wheels will match your
existing trailer hardware. Be certain to match your wheel 'bolt circle' pattern to the
axle hub. The bolt circle is determined as follows:
Tire 'load range', or the maximum weight each tire can safely support, must be considered
when selecting the proper size tire for your application. The load range and maximum
weight capacity are indicated on the tire side wall.
* LOAD RANGE B = OLD 4 PLY RATING
* LOAD RANGE C = OLD 6 PLY RATING
* LOAD RANGE D = OLD 8 PLY RATING
WHY 'ST' SPECIAL TRAILER TIRES?
These 'Special Trailer' (ST) tires have been constructed for better high speed durability
and bruise resistance under heavy loads. Trailer tire construction varies substantially
from automotive tires, therefore it is essential to choose the correct tire for your
towing application. In general, trailer tires have the same load range (or ply) from bead
to bead and are bias ply construction. This allows for a stiffer side wall which provides
safer towing by helping to reduce trailer sway problems. The use of 'Passenger Car' (P) or
'Light Truck (LT) tires a on a trailer is not recommended because their construction,
usually radial or bias belted, allows for more flexible side walls. This could lead to
increased trailer sway and loss of control.
Tire 'inflation pressure' is also an important factor in proper handling as well as tire
life. Maximum inflation pressure is indicated on the tire side wall and should always be
checked when the tire is cold before operation.
Finally, an important safety procedure is to apply and maintain proper 'lug torque'. Too
little torque may cause the wheel to wobble or fall off. Wheel nuts/bolts should be
torqued after each wheel removal, retorque after 50 miles and frequently thereafter.
Follow the manufacturers recommended torque pattern:
Use 60 cone angle zinc plated nuts or lug bolts initially tighten to 12-20 ft. lbs. using
a cross tightening sequence (1,3,2,4 or 1,3,2,5,4). Finish torquing to 70-80 ft. lbs.
(NOTE: Nuts and studs should be clean, dry and not lubricated.) Retorque after 50 miles of
use and frequently thereafter.
2 cycle TCW-3 oil
Bring in an empty gallon container and save $3.00 on a Gallon of Evinrude and
Johnson TCW-3 oil.
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