Operation Manual

CycleWheels and tyres
80
10.1 Tyres and valves
DANGER
Poor visibility to other road users.
Risk of accident and injury!
x Ensure that reflectors are clean and easily visible.
CAUTION
Inner tube blow-out due to penetration by foreign bodies.
Risk of accident and injury!
x Check the tyres regularly for damage and wear.
x Replace damaged or worn tyres immediately.
x Have damaged or worn tyres replaced by your dealer if you
lack the necessary expertise and the tools required.
NOTE
Damage due to fitting a tyre that differs from the original size.
Risk of damage!
x Contact your dealer if you have any questions about tyre size.
The tyres allow the cycle to grip the road, transmit the drive forces to the road surface,
and provide cushioning against bumps. Various types of tyre may be fitted depending on
how the cycle is used.
Tyre size is indicated on the sidewall of each tyre. A variety of specifications may be
recorded here, such as:
– The ETRTO size, which is given in millimetres. If 52-559 is indicated on the tyre,
then the inflated tyre is 52 mm wide with an internal diameter of 559 mm.
(ETRTO stands for the European Tyre and Rim Technical Organisation).
– The size in inches. If 26 × 2.35 is indicated on the tyre, then the inflated tyre is
2.35" wide with an internal diameter of 26".