Stride length and stride frequency trade off
Top speed is stride length multiplied by stride frequency. Longer legs buy you length and charge you frequency, because a longer limb takes longer to swing through. Bolt covered his 9.58 world record in 41 strides averaging about 2.44 m. Most of the men in that final needed 44 or more. Jumpers face the same tradeoff from the other direction, which is covered in how tall high jumpers are.

