Bolding mine.
Wrong. One assumes he meant the spare tire.
But thanks for playing.
Well, obviously, one assumed the spare, and one assumed the steering wheel. They just weren’t the same one. 
Because having only one would be a real drag.
One of many reason I read the dope. Your explanation about the driving dynamics of the sidecar rig is excellent.
To the OP: one of many alternatives is the Marine Corp Styker. http://en.wikipedia.org/wiki/Stryker
Same reason tables have four legs.
I have a glass of port in front of me. The glass is from a cafe in a little French village, just over the pass from Italy.
Would you put that on a three-legged table?
I’m pretty sure I’ve seen three legged tables. Also two and one legged tables (of course, the latter categories have pretty broad feet)
Oh, great. Now I’m picturing my cute little glass precariously perched on a table that consists of nothing but a round top with one wobbly broomstick leg ::shudder::
Well, picture a table where there is one leg in the middle, but the “foot” is several feet across. I’ve seen the design used both at fast food joints and with dining room tables, since it means nobody has to worry about squeezing around a table leg when they have several people at the table.
Awe, shucks. You’re welcome! Let me get back to you teaching me how to count all them wheels on automobiles. One assumes the steering wheel is one. Essentially, all cars have 'em. As for the spares: 13% now come without them.
So, one might want to keep assuming the fifth wheel is the steering wheel.
I’ll even cite it for ya:
http://articles.chicagotribune.com/2011-06-23/classified/ct-biz-0623-autos-spare-tires-20110623_1_tires-automakers-dan-edmunds
.
The car I want has 2 wheels: