All-day road riders, gran fondo people, and anyone who found Madone/Émonda too low.
IsoSpeed endurance geometry: taller stack, longer wheelbase, and a rear end that takes the sting out of cobbles and chipseal. Still a road bike, not a Checkpoint.
New road riders and anyone who wants Specialized road geometry without carbon race numbers.
The endurance/entry alloy Specialized: taller and calmer than Allez Sprint. It is a first road bike and a winter beater, not a Tarmac.
Sportive and rough-road riders who found R5/S5 too low.
Cervelo endurance road: taller, more tire room, all-day. It is not a slow bike — it is an R5 that sat up.