Thanks, guys.I was planning to include motor in the previous kart I built, but afraid the seating position would be too high.It turned out to be no problem at all.@Fred : The rim is a match for the tire though it's twice as wide, no glue required.
Great fun! A good looking build that looks fun to play with. Those front bumpers will protect it from crashes against skirting boards and the like too. Great work in choosing just the right pieces for the job.