Permitted tyre size
The legally permitted tyre size is indicated in your vehicle's registration
documents (fig. 1) under numbers 20-23 in the area circled in red. Owners of the new vehicle registration or licence
part I can find
the tyre size under numbers 15.1 to 15.3 and / or in the EEC type-approval
conformance certificate under number 50. Tyre dimensions
The tyre dimensions include:
Tyre size, bearing load and speed index. For search purposes
, the tyre size and the speed index are important.
The first line of fig. 2 displays the tyre size: 175/65R13 80S
This is made up of four components:
- Nominal tyre width in mm (175)
- Aspect ratio in percent (65)
- Type (R for 'Radial')
- Inches (13)
The speed index is also indicted with a series of
letters. This is 'S' in this case. This indicates the
top speed suitable for this particular tyre. An exact
explanation of the speed indexes is provided in table 1. Note:
The speed index may be “higher” (tyre approval for a higher
speed) than what is entered into the vehicle's documentation, and in case of
winter and all-season tyres, this may even be lower, but only
in this case specifically. In this case
, you will need to add the corresponding sticker into the cockpit of your vehicle
which indicates this speed limit.
The bearing load, which is '80' in this case, indicates the load-bearing capacity
of the tyre. The mounted tyres must correspond with the
load-bearing capacity that is entered in the vehicle documents at least.
Higher values are permitted.
: This indicates a tyre with an especially
high load capacity (for small vans, minibuses, vans,
off-road vehicles, etc.). However, the amount of the load capacity
is also of crucial importance here.
Other permitted tyre sizes may be listed in the remarks box (no. 33)
. Figure 3 indicates that this vehicle may feature tyres of
width 175 mm as well as 185 and 195 mm.
To the top
Speed index (GI)