The new Tarmac is designed to go fast there's no if's and's or but's about thatâbut it represents so much more than just aerodynamic prowess. With a light-weight rider-first engineeredâ frame it delivers the best-possible ride characteristics no matter the size. So no matter what you have planned for your new Tarmac its ready to help you achieve your goalsâprs koms or podium top-steps. One bike to rule them all.With the new Shimano 105 Di2 12-speed group to bring electronic shifting to the masses along wtih some fast rolling tires in the turbo Pro 700x26mm tires this new Tarmac delivers performance at a more palatable price point.