Sprocket

1. A sprocket, comprising:

alternating first and second teeth,

the first teeth having a first maximum width, and the second teeth having a second maximum width greater than the first maximum width,

the second teeth having a drive side and a non-drive side relative to a drive direction of the sprocket, a drive-side surface at the drive side, a non-drive-side surface at the non-drive side, and a drive-side relief at the drive side,

a maximum width of the drive-side surface being greater than a maximum width of the non-drive-side surface, and the drive-side relief comprising a fillet.

2. The sprocket of claim 1 , further comprising:

the second teeth being asymmetrical about a plane extended radially from a rotational axis of the sprocket, and

the second teeth being substantially symmetrical about a centerline oriented substantially perpendicular to the plane.

3. The sprocket of claim 1 , further comprising:

the second teeth having a lateral surface,

the second maximum width defined at the lateral surface, and

the drive-side relief extended between the drive-side surface and the lateral surface.

4. The sprocket of claim 3 , further comprising:

the lateral surface having a midline offset relative to a plane extended radially from a rotational axis of the sprocket in a direction opposite the drive direction of the sprocket.

5. The sprocket of claim 1 , further comprising:

the second teeth having a non-drive-side relief at the non-drive side,

the non-drive-side relief comprising a fillet.

6. A sprocket, comprising:

teeth radially projecting from a body,

the teeth including first teeth having a first maximum width and second teeth having a second maximum width greater than the first maximum width alternately arranged with the first teeth,

the sprocket to rotate in a drive direction about a rotational axis,

the second teeth having a drive-side surface and a non-drive-side surface relative to the drive direction, a lateral surface, and a drive-side relief between the drive-side surface and the lateral surface,

a maximum width of the drive-side surface being greater than a maximum width of the non-drive-side surface.

7. The sprocket of claim 6 , wherein the first and second teeth comprise a series of alternating wide and narrow teeth relative to each other.

8. The sprocket of claim 6 , wherein the second maximum width of the second teeth is defined at the lateral surface.

9. The sprocket of claim 6 , further comprising:

the second teeth being asymmetrical about a plane extended radially from the rotational axis.

10. The sprocket of claim 9 , further comprising:

the second teeth being substantially symmetrical about a centerline oriented substantially perpendicular to the plane extended radially from the rotational axis.

11. The sprocket of claim 6 , wherein the drive-side relief comprises a non-linear surface.

12. The sprocket of claim 6 , wherein the drive-side relief comprises a concave fillet between the drive-side surface and the lateral surface.

13. The sprocket of claim 6 , further comprising:

a non-drive-side relief between the non-drive-side surface and the lateral surface.

14. The sprocket of claim 13 , wherein the non-drive-side relief comprises a non-linear surface.

15. The sprocket of claim 13 , wherein the non-drive-side relief comprises a concave fillet between the non-drive-side surface and the lateral surface.

16. The sprocket of claim 6 , further comprising:

the second teeth having a lateral tooth tip chamfer between the lateral surface and a tip portion thereof, and a lateral tooth root chamfer between the lateral surface and a root portion thereof,

wherein the drive-side relief extends between the drive-side surface, the lateral surface, the lateral tooth tip chamfer, and the lateral tooth root chamfer.

17. The sprocket of claim 6 , wherein the sprocket comprises a chainring.

18. A sprocket, comprising:

first teeth having a first maximum width; and

second teeth having a second maximum width greater than the first maximum width, the second teeth alternately arranged with the first teeth,

the second teeth having a leading surface and a trailing surface relative to a drive direction of the sprocket, a lateral surface, and a relief between the leading surface and the lateral surface,

a maximum width of the leading surface being greater than a maximum width of the trailing surface.

19. The sprocket of claim 18 , wherein the second maximum width of the second teeth is defined at the lateral surface.

20. The sprocket of claim 18 , further comprising:

a midline of the lateral surface being offset relative to a plane extended radially through a center of a respective tooth.

21. The sprocket of claim 20 , wherein the midline of the lateral surface is offset relative to the plane extended radially through the center of the respective tooth in a direction opposite the drive direction of the sprocket.

22. The sprocket of claim 18 , wherein the relief comprises a concave relief.

23. The sprocket of claim 22 , wherein the concave relief comprises an arcuate surface between the leading surface and the lateral surface.

24. The sprocket of claim 18 , wherein the second teeth are substantially symmetrical about a centerline extended through the leading surface.

25. The sprocket of claim 18 , further comprising:

a relief between the trailing surface and the lateral surface.

26. The sprocket of claim 25 , wherein the relief comprises a concave relief.

27. The sprocket of claim 26 , wherein the concave relief comprises an arcuate surface between the trailing surface and the lateral surface.