When someone attacks, the rest of the peloton look at them – is it a GC contender? If so, the rest of the GC contenders will have to (try to) follow the move, put their teams on the front, chase it down. If it’s some nobody who’s an hour down on GC, they’ll let it go. Give the breakaway their moment of glory on TV then if it’s a flat sprinters stage, they’ll pull it back by the end. They can pull back gaps of 10 mins with perfectly judged efforts.
So even if it was a free-for-all stage (which, for the first part into Paris, it isn’t), how on earth are 2 GC contenders going to get 2 mins up the road and hang on?
Is it worth watching if there’s gonna be no race?
The last part of it, the laps on Champs Elysee are a full on race, averaging over 30mph. Proper thrilling stuff as the sprinters teams try to get their leadouts sorted and as occasional lone riders or small groups try to make a break off the front.