Opel ASTRA Owner's Manual page 272

270 Vehicle care
3. Place the hook end of the strap
through the loop and pull it until
the strap is fastened securely to
the lashing eye.
4. Insert the strap through the
spokes of the wheel as shown in
the illustration.
5. Mount the hook to the rear lashing
eye.
6. Tighten the strap and secure it
using the buckle.
9 Danger
Always drive with folded up and
engaged rear seat backrests when
stowing a damaged full size wheel
in the load compartment.
Stowing a damaged full size
wheel in the spare wheel well,
Sports Tourer and 4-door
notchback
Vehicles equipped with a full size
spare wheel:
A damaged full size wheel must be
stowed outside up in the spare wheel
well secured with the wing nut.
The floor cover can be placed on the
projecting wheel.
Vehicles equipped with a temporary
spare wheel:
Secure a damaged full size wheel
outside up with the wing nut in the
spare wheel well after exchanging the
thread bolt by an extension bolt,
placed in the tool bag 3 255. To
replace the bolt: