T.Cycle T-Series is our electric fat bike that pushes attitude even further. Like its F-Series’ cousin, T-Series also boasts more power and up to 40% more range with Das-Kit motor and 720Wh Das-Kit battery. But T-Series pushes fat to the max with 26” x 4 inch super fat tires that open up an even wider range of terrain. Deeper sand and snow, more rugged and rutted trails, and rough city streets that other e-bikes might find unforgiving. T-Series’s sturdier frame takes more punishment and keeps rolling.