Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Feature | GT Force | Driving Force EX | Driving Force Pro | Driving Force GT | G25 Racing Wheel | G27 Racing Wheel |
| --- | --- | --- | --- | --- | --- | --- |
| Currently available | no | no | no | yes | no | yes |
| Clutch pedal | no | no | no | no | yes | yes |
| Gear stick | no | no | yes | yes | yes | yes |
| Six-speed shifter | no | no | no | no | yes | yes |
| Sequential shifter | yes | yes | yes | yes | yes | no |
| Real-Time Adjustments Dial | no | no | no | yes | no | no |
| Wheel size | TBC | 25cm (10-inch) | 25cm (10-inch) | 28cm (11-inch) | 28cm (11-inch) | 28cm (11-inch) |
| Steering range (degrees) | 200 | 200 | 900 | 900 | 900 | 900 |
| Steering wheel cover | Rubber | Rubber | Rubber | Rubber | Leather | Leather |
| D-pad / action buttons | yes | yes | yes | yes | 12 | 16 |
Question:
Driving Force EX of 25cm (10-inch) involves what feature?
Answer:
Wheel size