Instruction manual

13 Wheels and Tyres
126 Touring - 03/11-1 - englisch (EN) - 0731070 - HYW-0102-01EN
Check regularly that the wheel nuts are firm-
ly seated. Re-tighten the wheel bolts of a
changed wheel cross-wise (Fig. 101) after
50 km (30 miles). For tightening torque see
section Tightening Torque.
When using new or newly painted rims, re-
tighten the wheel bolts once again after ap-
prox. 1,000 to 5,000 km (600 miles to
1,000 miles).
For lay-ups or long periods of inactivity,
keep the tyres and tyre bearings free from
pressure points:
- Jack up the caravan so that the tyres do
not bear any load
or
- move the caravan every 4 weeks to
change the position of the tyres.
Fig. 101 Tighten the wheel bolts cross-wise
13.2 Tyre Selection
The tyre sizes permissible for a vehicle are indicated in the vehicle documents. Each tyre must fit
the vehicle on which it will be driven. This applies to the external dimensions (diameter, width), which
are indicated with the standardised size designations. In addition, the tyres must meet the require-
ments of the vehicle with regard to weight and speed.
Weight refers to the maximum permissible axle load which can be distributed on two tyres. The max-
imum load-carrying capacity of a tyre is indicated by its load index (= LI, load index code).
The maximum permissible speed for a tyre (with full load capacity) is indicated by the speed index
(= SI). Together, load index and speed index form the operating code of a tyre. This is an official
component of the complete, standardised dimensions description which appears on every tyre. The
information on the tyres must correspond to the specifications which appear in the vehicle papers.