The realspeed.zip file you have requested: Tools and Utilities / Real Speed - 95.87kb is not available. Perhaps try browsing all files for the game Grand Theft Auto: San Andreas and upload any files you want to share or are missing. This is the only information we could locate:
Here is a modification that will alter all of the Vehicles within Grand Theft Auto: San Andreas, that will give all cars and motorbikes a more realistic speed and acceleration. This modification has several options that can change either the cars or bikes, or both. There is also another option for those that like to do stunts that alters the acceleration to that of a faster rate.