The end of this Tour de France will mark the final lap around France for many riders. Some knowingly, if they've chosen to retire, and for some unknowingly – they might just never get the chance to be here again.
One rider for whom it's a choice, though, will be Geraint Thomas, and it's hard to think of many riders in the current peloton who have had the level of impact and longevity at the Tour that the Welshman has.
