Average speed per stage
The average speed over all stages is 39.6519 km/hour. The average speed for the whole race is computed by dividing the total distance by the sum of stage times of the final GC winner. In the last column the average speed up to that stage is shown. This is the average speed for the leader in the race at that stage.
| Stage | KM | Sum stage times | Avg. speed stage winner | Total avg. speed after stage | |
|---|---|---|---|---|---|
| Stage 1 | Legazpia - Legazpia | 129 | 03:20:06 | 38.68 | 38.681 | |
| Stage 2 | Legazpia - Plencia | 158 | 07:21:51 | 39.21 | 38.973 | |
| Stage 3 | Plencia - Vitoria | 191 | 12:12:06 | 39.48 | 39.175 | |
| Stage 4 | Vitoria - Santesteban | 171 | 16:19:52 | 41.42 | 39.74 | |
| Stage 5a | Santesteban - Fuenterrabía | 91 | 18:39:29 | 39.11 | 39.661 | |
| Stage 5b (ITT) | Fuenterrabía - Fuenterrabía | 13 | 18:59:25 | 39.13 | 39.652 | |
| 753 |