188 MICHELIN Motorcycle Scooter Tire Guide 2026 Edition
sidewall
DESCRIPTION
Cuts extended to the carcass ,
visible plies with or without
broken cords . Pinching
impact . Immediate break
without pinching .
CAUSES
Impact or pinching of the
sidewalls after running over
a pothole or mounting a kern
for example
DEVELOPMENT
Rubber and or plies broken
on the sidewall running
underinf lated
CHECKS ADVICE
Check conditions of use
Replace the product s
concerned if the carcasses
are damaged
crown
DESCRIPTION
Impact with plies broken on
the crown .
Evidence of impact are
generally found on the tread .
CAUSES
External aggression by
running over sharp / blunt
objects .
DEVELOPMENT
Rubber and or plies broken
on the sidewall running
underinf lated
CHECKS ADVICE
Check conditions of use
Replace the tire
Examine the other tires on
the vehicle
sidewall
DESCRIPTION
Damage to sidewalls with or
without puncture instead of
perforation and / or tears .
CAUSES
External aggression either
by running over sharp / blunt
objects or by rubbing against
a foreign body .
DEVELOPMENT
Rubber and / or plies broken
on the sidewall , running
underinf lated .
CHECKS / ADVICE
• Check the conditions of use .
• Check pressure used .
• Replace the product ( s )
concerned if the damage is
extensive and has reached
plies or the carcass .
IV - THE MAIN PROBLEMS
USEFUL TIP
When making visual checks pay particular attention to the tread area and the sidewalls . Look for unusual , excessive , or
uneven tread wear , foreign objects , bulges or deformation , signs of penetration , cracking
of the rubber or any deterioration or damage .
The 7 main defects
Damage
impact
crown
DESCRIPTION
Crown damage with or
without puncture and / or tears
and splits . Localized breaking .
CAUSES
External aggression either
by running over sharp / blunt
objects or by rubbing against
a foreign body .
DEVELOPMENT
Damage to a tire by running
underinf lated , breakage of
plies , product delamination .
CHECKS / ADVICE
• Check conditions of use .
• Check pressure used .
• Replace the product ( s )
concerned if the damage is
extensive and has reached
plies or the carcass .
TECHNICAL DATA I THE MAIN PROBLEMS