Vehicles with more or
less fewer than four wheels are somewhat rare in the whole scheme of vehiclulardom (well, except for big trucks, I suppose). But vehicles that were modified at some point in the platform’s lifespan to alter the number of wheels are even more rare. The most commonly-known one is probably the Reliant Robin, which begat the Kitten with a new, rubber-donut-enriched front end. You might think the trail goes cold right there, but you’d be wrong. There are a good number of other vehicles that were tweaked to increase or decrease the number of wheels. It’s your job to think of and list them all.
Difficulty: Roughly equivalent to sitting through The Fall of the Roman Empire.
Learn your clichés, they’re your friends: Read the comments first and don’t post duplicates. Adding photos with standard HTML is good, but shrink the big ones with