Grand Design Reflection Fifth Wheel 150 Series, Owner'S Manual

Page: 68 / 220

Pre-Travel Information
62
Tire Tread
The tire tread provides the gripping action and traction that
prevent your vehicle from slipping or sliding, especially when
the road is wet or icy. In general, tires are not safe and should be
replaced when the tread is worn down to 1/16 of an inch.
Tread wear bars
are raised sections built into the bottom of
a tire’s tread grooves that show how much tread is remaining.
When they appear “even” with the outside of the tread, it is time
to replace your tires.
The Penny & Quarter Tests
Place a penny or quarter upside down into the tire groove.
• Penny - If you can see the top of Lincoln’s head,
you are ready for new tires.
• Quarter - If you can see the top of Washington’s head,
tires are OK but close to wearing out.
Inspect your tires regularly for uneven tread wear.
Thin Tread
Wear on
Tire Edges
Thin Tread
Wear Center
of Tire
Exagerated
Inner or Outer
Tread Wear
Wear Pattern
Under
Inflation
Over
Inflation
Loss of
Camber
or
Overloading
Possible
Cause
Solution
Fill tire with an air compressor to the
Recommended Cold Tire Pressure
Press tire valve stem, slowly release
air until reaching the Recommended
Cold Tire Pressure
Make sure your load does NOT exceed
the axle rating.
Edge Wear
Center Wear
Side Wear
Thin Inner or
Outer Edge
Diagonal
“ Scalloped ”
Tread Wear
Flat Spots
or Patchy
Tread Wear
Tire Skidding
Wheel Lock Up
or
Out of Balance
Alignment
or
Incorrect Toe-in
Loose Bearings
or
Wheel Balance
Toe Wear
Cup Wear
Flat Spots
Correct Toe-In is 0 - 0.5 degrees
Check Bearing Adjustment
and
Tire & Wheel Balance
Avoid Sudden Stops, Adjust Brakes
Check Tire & Wheel Balance
Tire Tread Wear Bars
2/32 ”
4/32 ”