Ford Focus 2004 Owner's Manual page 170

Capacities and specifications
Snow chains
Use only small link snow chains on
the driving wheels (front).
Snow chains may only be fitted to
185/65 R 14 tyres. On the ST170,
snow chains may only be fitted to
195/55 R 16 tyres.
Do not exceed 30 mph (50 km/h).
Remove the chains immediately on
snow-free roads.
When using snow chains, vehicles
with the Traction Control System
(TCS) or Electronic Stability
Program (ESP) may exhibit some
unusual driving characteristics
which can be avoided by switching
the system off.
Refer to the section Traction
Control System (TCS)/Electronic
Stability Program (ESP).
In order to avoid damaging
full-diameter wheel covers, they
should be removed before driving
with snow chains.
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