Enviolo/380 is a Spike model for those who would rather not have a derailleur system. It features the Nuvinci /Enviolo TR system . The TR System is far superior to the cheaper CT system -310% Gear Range  for the CT vs 380% for the TR. In addition the TR system can handle more torque which is important if you decide to install  a Mid Drive Motor in the future.  Schwalbe Big Apple Tires and Avid BB5 Brakes are standard.