I give in: Red one's are fastest!

[Mr K]

Owning a yellow one, I hate to admit it:

 

[Pukmeister]

You need to get that reverse gear fixed mate ...

 

[kal]

amazing speed for 0 rpm ... wonder what it will do at the red-line!?

 

[Mr K]

Wel obviously we had to gear her up a tad and employ very high shutter speed so as to get the road to appear motionless.....