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► Tyres
Tyres play an important role in ensuring ride comfort and grip on roads and tracks.
Off-road grip is provided by the tyre tread. Please follow these basic rules:
Rule 1:
High tyre pressures are not suitable for off-road use. The maxi-
mum and minimum pressure permitted for your tyres is indicated
on the tyre walls. Avoid leaving your MTB/Racing bike in direct
sunshine, the tyres may suffer and the pressure will increase. With
time, tyres always lose some air; this is particularly the case if you
use latex inner tubes. Check your tyre pressure regularly, and
pump up your tyres to the required pressure if necessary. A con-
version table for the two standard units of pressure may be found
in the care and maintenance section of this manual. Pressure loss
is greater the higher your tyre pressure is.
Rule 2:
Wide tyres provide better grip and rolling than narrow ones. Wide
tyres are particularly recommended for riding in autumn and
winter. Further, wide tyres roll better – assuming the same pres-
sure – than narrow tyres. The wind resistance of wide cross-
section tyres only plays a minor role at extremely high speeds.
Treadless tyres are the best solution on metalled surfaces (streets,
surfaced tracks).
Used tyres don't belong in the dustbin. They can be completely
recycled, please ask your dealer!
There are matching tubes for all sizes of tyre; butyl tubes stay
inflated better than latex tubes.
The dimensions of shells and tubulars must match!
► Inner tubes
Inner tubes have a virtually unlimited lifespan. In the case of a puncture a tube can
be repaired with a conventional puncture repair kit – they will then function just as
well as before. Please remember the following whenever you install a new tube:
The tube should not be pinched between the rim and the tyre bead.
·
The tyres should not be unbalanced after installation, e.g. when one part of the
·
tyre is higher.
The valve must be perpendicular to the rim.
·
The rim tape must be suitable for high pressures, have the correct width, and
·
be undamaged and correctly installed.
_ 58
ROTWILD 2007/2008 – Änderungen vorbehalten / Subject to change
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