ROAD SAFETY MONITORING TEAM

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ROAD SAFETY MONITORING TEAM
TYRE SAFETY
Partners in Road Safety John Graham Martin Keen
csm51MAR2002
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TYRE SAFETYWORN OUT TYRES
ALL FROM ONE TRUCK
csm51MAR2002
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TYRE SAFETYWORN OUT TYRES
ALL FROM ONE TRUCK
csm51MAR2002
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TYRE SAFETYWORN OUT TYRES
FROM ONE TRUCK
csm51MAR2002
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TYRE SAFETYOVERLOADING
DO NOT OVERLOAD TYRES!
!!
15 Tonnes Overload on 25T capacity King Trailer .
csm51MAR2002
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TYRE SAFETYOVERLOADING
Prime mover overloaded on rear axle Two tyres
blew immobilised Truck. A following vehicle ran
into rear One Dead
Tyre overloading was a significant contributing
factor to this fatality
csm51MAR2002
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TYRE SAFETYOVERLOADING
Grossly overloaded rear single axle of Prime
Mover. Tyre blew. Driver pulled over onto sloping
hard shoulder. Centre of Gravity did the rest.
Tyres were overloaded- started the sequence of
events.
csm51MAR2002
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TYRE SAFETY
Tanker was driven I Km on Flat Tyre. Tread
Separated Driver Overreacted ROLLOVER
Running on a deflated tyre, a significant
contributory factor in this incident
csm51MAR2002
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TYRE SAFETYUNSAFE CONDITUION
Tread separating from inside dual tyre of a
BUS--egged
Drivers Daily Checks done?? How long was this
tyre like this???
csm51MAR2002
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TYRE SAFETYFAST and HOT OVERHEATING
High speed journey from Muscat over 120kph non
stop -past Nizwa, front tyre blew. Rollover No
seatbelts being worn TWO DEAD
csm51MAR2002
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TYRE SAFETYFAST and HOT
Tread Separation. Driver lost control ran off
road.
Again, a long distance fast trip in heat.
Tyre pressures checked??
csm51MAR2002
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TYRE SAFETY

• Tyres are the only points of contact between your
  vehicle and the road. They affect steering,
  braking and acceleration.
• Your Safety therefore depends on a relatively
  small contact patch or tyre-footprint area.
• YOU MUST TAKE CARE OF YOUR TYRES
• NEGLECTING THEM CAN COST LIVES
• Most tyres nowadays are tubeless Constructed in
  a manner that does away with an inflatable
  inner tube. These tyres normally have the mark
  TL or Tubeless written on their sidewalls.

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TYRE SAFETY

• Tubeless Tyre
• Tyre and the rim of the wheel together form an
  air container-the inner wall of the tyre has an
  airtight lining.

Air movement during puncture of a tubeless
tyre If a sharp object, eg. a nail, punctures
the tread, air escapes only around the nail.
Generally results in gradual deflation as long as
the nail remains in the tyre a typical SLOW
puncture
Tubed Tyre Tyre is kept inflated by air in the
inner tube. Air pressure causes the tubes valve
to fit into, and thus seal, the valve hole in
the wheel rim. Air movement during puncture of a
tubed tyre If a sharp object goes through the
tread and puntures the tube, tube (and valve)
immediately shrink leaving the valve hole
unsealed. Air escapes QUICKLY, entire tyre
collapses flat tyre in seconds.
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TYRE SAFETY

• DO NOT FIT TUBES INTO TUBELESS TYRES
• The rubbing of the inner tube against the tyre
  casing (designed to be tubeless, therefore
  tubeless tyres have rougher inside linings)
  creates additional heat increasing the likelihood
  of tyre failure.
• TUBELESS TYRES HAVE BETTER
• HANDLING,
• RIDE COMFORT
• SAFETY CHARACTERISTICS
• DO NOT DIMINISH THESE ADVANTAGES BY FITTING TUBES
  TO TUBELESS TYRES.

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TYRE SAFETY

• DO NOT FIT TUBES INTO TUBELESS TYRES
• By inserting a tube into a tubeless tyre it is
  converted completely into a tube-type tyre and
  rim combination ie. It will deflate very
  quickly when punctured, and you may lose control
  of the vehicle.
• The running characteristics of the tubeless tyre
  can be adversely affected by inserting a tube,
  eg. Side wall flexibility.

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TYRE SAFETY

• CHECK TYRES DAILY
• Correct tyre pressures-including spares
• Tread Depth (min1.6mm over 75 of tread width)
• No cuts, bumps or lumps
• No bulges or tears
• No mixing of different tyres on same axle (weight
  rating, tread, type)
• No cord or ply showing
• Tyres suitable for vehicle use and loading
• No stones wedged between dual tyres
• Store tyres correctly-upright, in cool dry,
  rotate stock
• Use a tyre cage when inflating heavy tyres

NEGLECTING TYRES COSTS LIVES
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ROAD SAFETY MONITORING TEAM
TYRE SAFETY
Equivalent Pressures
Partners in Road Safety John Graham Martin Keen
csm51MAR2002
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ROAD SAFETY MONITORING TEAM
THE FACTS
Partners in Road Safety John Graham Martin Keen
csm51MAR2002
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ROAD SAFETY MONITORING TEAM
TYRE SAFETY
THE END
Partners in Road Safety John Graham Martin Keen
csm51MAR2002