Tomberlin has carved a niche in the realm of fuel efficient and electric vehicles, contracting joint efforts between some of the world""s foremost specialty manufacturers. Building upon a strong reputation in the realm of electric vehicles and popular gas scooters, Tomberlin introduced the XS line in 2006 with two models: the XS90, and XS110. As suspected, the numbers associated with the model are representative of the engine displacement, measured in cubic centimeters. The Tomberlin XS models are classified as Enduro motorcycles, and are best enjoyed off-road, or on tracks and trails, and are frequently used as pit bikes. They""re versatile vehicles, and considering the price tag, they are also quite affordable.