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A wheel assembly comprises a wheel, a transmission assembly mounted on the wheel, and a motor coupled to the wheel through the transmission assembly. The motor includes an axle extending in a radial direction of the wheel. The transmission assembly transmits a rotational motion of the axle to a rota

A wheel assembly comprises a wheel, a transmission assembly mounted on the wheel, and a motor coupled to the wheel through the transmission assembly. The motor includes an axle extending in a radial direction of the wheel. The transmission assembly transmits a rotational motion of the axle to a rotational motion of the wheel.

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1. A wheel assembly comprising: a wheel with a bearing that includes a circular inner race and a circular outer race that are rotatable with respect to each other, the outer race being mounted on the wheel;a transmission assembly mounted on the wheel; anda motor coupled to the wheel through the tran

1. A wheel assembly comprising: a wheel with a bearing that includes a circular inner race and a circular outer race that are rotatable with respect to each other, the outer race being mounted on the wheel;a transmission assembly mounted on the wheel; anda motor coupled to the wheel through the transmission assembly, wherein the motor includes an axle extending in a radial direction of the wheel, and the transmission assembly transmits a rotational motion of the axle to a rotational motion of the wheel;wherein the motor is secured to the inner race and is within the bearing. 2. The wheel assembly according to claim 1, wherein the transmission assembly comprises: a first gear mounted on an interior surface of the wheel; anda second gear mounted at a distal end of the axle and engaged with the first gear. 3. The wheel assembly according to claim 2, wherein the first gear and the second gear are bevel gears. 4. The wheel assembly according to claim 2, wherein the first gear is a ring gear. 5. The wheel assembly according to claim 4, wherein the bearing is mounted on a rim of the wheel, outside of the ring gear and inside of an outer circumference of the rim. 6. The wheel assembly according to claim 1, wherein the wheel includes a tire and a rim, the tire is mounted on an exterior surface of the rim, and the outer race of the bearing is mounted on an interior surface of the rim. 7. The wheel assembly according to claim 1, wherein the inner race is mounted on a base of a transportation device. 8. The wheel assembly according to claim 1, wherein the outer race and the inner race form a plurality of circular channels and the bearing further includes a plurality of rolling elements disposed within the plurality of circular channels. 9. The wheel assembly according to claim 1, wherein the outer race and the inner race form a circumferential cavity, wherein the transmission assembly is disposed within the circumferential cavity. 10. The wheel assembly according to claim 1, wherein the outer race and inner race form a circumferential cavity, wherein at least a part of the axle is enclosed within the circumferential cavity. 11. A motorized transportation device, comprising: a base,at least one wheel assembly, the at least one wheel assembly comprising: a wheel with a bearing that includes a circular inner race and a circular outer race that are rotatable with respect to each other, the outer race being mounted on the wheel, the inner race being coupled to the base;a transmission assembly mounted on the wheel; anda motor coupled to the wheel through the transmission assembly, wherein the motor includes an axle extending in a radial direction of the wheel, and the transmission assembly transmits a rotational motion of the axle to a rotational motion of the wheel; anda control system for controlling the motor;wherein the motor is secured to the inner race and is within the bearing. 12. The motorized transportation device according to claim 11, wherein the transmission assembly comprises: a first gear mounted on an interior surface of the wheel; anda second gear mounted at a distal end of the axle and engaged with the first gear. 13. The motorized transportation device according to claim 12, wherein the first gear and the second gear are bevel gears. 14. The motorized transportation device according to claim 12, wherein the first gear is a ring gear. 15. The motorized transportation device according to claim 14, wherein the bearing is mounted on a rim of the wheel, outside of the ring gear and inside of an outer circumference of the rim. 16. The motorized transportation device according to claim 11, wherein the wheel includes a tire and a rim, the tire is mounted on an exterior surface of the rim, and the outer race of the bearing is mounted on an interior surface of the rim. 17. The motorized transportation device according to claim 11, further comprising a forefoot cross member, which includes a battery pack. 18. The motorized transportation device according to claim 11, further comprising a heel support member, which includes a battery pack. 19. The motorized transportation device according to claim 18, further including a locking mechanism for securing the shoe to the base. 20. The motorized transportation device according to claim 19, wherein the locking mechanism includes a cable system and a strap that tightens the cable system. 21. The motorized transportation device according to claim 19, wherein the locking mechanism includes a cable system and a button, and when the button is rotated, the locking mechanism tightens the cable system. 22. The motorized transportation device according to claim 19, wherein the locking mechanism includes a heel support member that is activated when the user steps into the base, and when it is activated, it secures the user's heel on the base. 23. The motorized transportation device according to claim 22, wherein the heel support member is coupled to the base through a shaft and pivots on the shaft. 24. The motorized transportation device according to claim 23, wherein the position of the shaft is adjustable according to a size of the shoe. 25. The motorized transportation device according to claim 11, further including at least one additional wheel assembly coupled to the base through a suspension. 26. The motorized transportation device according to claim 25, wherein the suspension includes a spring member disposed between the base and the additional wheel assembly. 27. The wheel assembly according to claim 11, wherein the outer race and inner race form a circumferential cavity, wherein at least a part of the axle is enclosed within the circumferential cavity. 28. The motorized transportation device according to claim 11, wherein the motorized transportation device is a skate. 29. A wheel assembly comprising: a wheel having a bearing that includes a circular inner race and a circular outer race that are rotatable with respect to each other, the outer race being mounted on the wheel,a ring gear disposed on an inner circumference of the wheel; anda motor disposed within the ring gear and secured to the inner race, the motor having a shaft and a gear mounted on an end of the shaft,wherein the gear of the motor engages the ring gear of the wheel to transmit a rotational motion of the shaft to a rotational motion of the wheel.