The third solution would be the best, in my opinon (moyennant quelques corrections de ton propos) :

1 — we create "racer" ;

2 — a dedicated soul transfers manually the 40 or 50 bikes belonging to this class from "sporter" to "racer" ;

3 — what is left in "sporter" is industrially moved to "road" ;

4 — we DESTROY the "sporter" hideous name and class.

Since I'm more in a mood/mode lurking on IMCDb than watching movies, this week, I could be the poor soul doing the discrimination job (OK, since I'm the one who asked for it, too).

It would take me about two hours. Or two days. Certainly not more.

For a short while, some of the pages would be adorned with a question thrown to the intelligence of all of my fellow IMCDbers, du style "'road' or 'racer'?"—because there are some guys who would be very helpful there, the French jplemoine or Brotherjack, unfortunately not always present, and nzcarnerd too (and probably some others who would reveal themselves in this opportunity). And their opinion would be very welcome. But the ambiguous cases are very few, methink.

Once the election of all the 'racers' done, I'll tell you to begin the mass deportation of the remaining 'sporters' to 'road'.

Ça irait, comme ça ?