The first five vehicles are 1) Dump 2) Formula 3) Gyro 4) Dozer 5) Marine. They assemble into Daibouken. Now, the Formula can carry the Gyro and tow the Dump, in which case they call that the Trailer. Go-go Trailer. Daibouken is already equipped with a Picker and Scooper, which combine to form the Go-goken (big blade). They have an attack called Adventure Drive.
Then, of course, there is Super Daibouken. That takes nine of the vehicles. They don't use the Jet. That provides for at least two attacks: "Cannon Ball Head" and "Double Arm Crash". But that's not all! No. Include Jet and you have the Ultimate Daibouken. That provides for such attacks as... um, "Variable Typhoon" and "Ultimate Blaster".
But I must not forget Bouken Silver's trio. Yes, he got three lovely vehicles. The main is Fire. It combines with Aider and Police to form the Siren Builder. These vehicles are designated 11, 12 and 13.
In a move towards a militant mindset, they have five more vehicles and these combine to form Dai Voyager. Number 14 is the Commander, which is Red's. 15 is the Carrier, Black's. 16 is the Fighter, Blue's. 17 is the Attacker, Yellow's. 18 is the Loader/Roader? which is Pink's. This is just to be fair, so they all have three vehicles.