So long as it is pedal powered it's OK.
Riders in team colours are akin to people who wear footie shirts - sorry, but you aint ever gonna be Rooney or Contador
There IS a difference here.
Contador could quite easily play a full game of soccer, but Rooney couldn't for the life of him ride a mountain stage of the Tour. It doesn't matter if Contador is crap at footie, Rooney wouldn't get up the first H cat climb.
The cyclist with the replica jersey is praising an athlete. The soccer fan with his Man U replica shirt is mindlessly following 'celebrity culture'.