Chainstay protector with spaced protrusions
A bicycle includes a chainstay protector having an upper surface including a valley, a first peak, and a second peak. The first peak extends upwardly from the valley toward the chain and has a first contact surface positioned to contact the chain a first height above the valley. The second peak extends upwardly from the valley toward the chain and has a second contact surface positioned to contact the chain a second height above the valley. The first contact surface is spaced from the second contact surface by a gap that is at least 5 times the first height. Each of the first and second contact surfaces has a length that is less than the length of the gap and less than two times a pitch of the chain.
1. A bicycle comprising:
a front wheel and a rear wheel;
a chain adapted to transfer power to the rear wheel, the chain having a pitch; and
a frame supported by the front wheel and the rear wheel, the frame including a chainstay protector having an upper surface positioned below the chain, the upper surface including:
a valley;
a first peak extending upwardly from the valley toward the chain and having a first contact surface positioned to contact the chain a first height above the valley, wherein the first contact surface has a first length that is less than two times the pitch of the chain; and
a second peak extending upwardly from the valley toward the chain and having a second contact surface positioned to contact the chain a second height above the valley, wherein the second contact surface has a second length that is less than two times the pitch of the chain;
wherein the first contact surface is spaced from the second contact surface by a gap having a length that is at least two times the pitch of the chain.
2. A bicycle as claimed in claim 1 , wherein the length of the gap is at least three times the pitch of the chain.
3. A bicycle as claimed in claim 2 , wherein the length of the gap is at least four times the pitch of the chain.
4. A bicycle as claimed in claim 3 , wherein the length of the gap is less than five times the pitch of the chain.
5. A bicycle as claimed in claim 1 , wherein the length of the first contact surface is greater than the pitch of the chain.
6. A bicycle as claimed in claim 5 , wherein the length of the second contact surface is greater than the pitch of the chain.
7. A bicycle as claimed in claim 1 , wherein there is no other portion of the upper surface directly between the first contact surface and the second contact surface.
8. A bicycle as claimed in claim 1 , wherein the gap is greater than or equal to approximately 8 times and less than or equal to approximately 20 times the first height.
9. A bicycle as claimed in claim 1 , wherein the gap is greater than or equal to approximately 10 times and less than or equal to approximately 12 times the first height.
10. A bicycle as claimed in claim 1 , wherein the chainstay protector further comprises:
a third peak extending upwardly from the valley toward the chain and having a third contact surface positioned to contact the chain a third height above the valley, the third contact surface being spaced from the second contact surface by a second gap that is at least 5 times the second height; and
a fourth peak extending upwardly from the valley toward the chain and having a fourth contact surface positioned to contact the chain a fourth height above the valley, the fourth contact surface being spaced from the third contact surface by a third gap that is at least 5 times the third height, and wherein the chainstay protector comprises fewer than eight peaks.
11. A bicycle as claimed in claim 1 , wherein the chainstay protector is mounted on a chainstay member of the frame, and wherein the chainstay protector comprises:
a base portion comprising a first material; and
an upper portion secured to the base portion and defining part of the upper surface, the upper portion comprising a second material that is more resilient than the first material, wherein the base portion comprises a first opening aligned with the first peak, and wherein a first pad of the second material extends through the first opening and contacts the chainstay member.
12. A bicycle comprising:
a front wheel and a rear wheel;
a chain adapted to transfer power to the rear wheel, the chain having a pitch; and
a frame supported by the front wheel and the rear wheel, the frame including a chainstay protector having an upper surface positioned below the chain, the upper surface including:
a valley;
a first peak extending upwardly from the valley toward the chain and having a first contact surface positioned to contact the chain a first height above the valley; and
a second peak extending upwardly from the valley toward the chain and having a second contact surface positioned to contact the chain a second height above the valley;
wherein the chainstay protector is mounted on a chainstay member of the frame, and wherein the chainstay protector includes:
a base portion comprising a first material; and
an upper portion secured to the base portion and defining part of the upper surface, the upper portion comprising a second material that is more resilient than the first material, wherein the base portion comprises a first opening aligned with the first peak, and wherein a first pad of the second material extends through the first opening and contacts the chainstay member.
13. A bicycle as claimed in claim 12 , wherein the base portion comprises a second opening aligned between the first peak and the second peak, and wherein a second pad of the second material extends through the second opening and contacts the chainstay member.
14. A bicycle as claimed in claim 12 , wherein the chainstay protector has an overall length and comprises a nose portion on a front end of the chainstay protector, the nose portion not including the first material of the base portion, the nose portion having a nose length that is at least approximately 5% of the overall length.
15. A bicycle as claimed in claim 12 , wherein there is no other portion of the upper surface directly between the first contact surface and the second contact surface.
16. A bicycle as claimed in claim 12 , wherein the gap is greater than or equal to approximately 8 times and less than or equal to approximately 20 times the first height.
17. A bicycle as claimed in claim 12 , wherein the gap is greater than or equal to approximately 10 times and less than or equal to approximately 12 times the first height.
18. A bicycle as claimed in claim 12 , wherein the chainstay protector further comprises:
a third peak extending upwardly from the valley toward the chain and having a third contact surface positioned to contact the chain a third height above the valley, the third contact surface being spaced from the second contact surface by a second gap that is at least 5 times the second height; and
a fourth peak extending upwardly from the valley toward the chain and having a fourth contact surface positioned to contact the chain a fourth height above the valley, the fourth contact surface being spaced from the third contact surface by a third gap that is at least 5 times the third height, and wherein the chainstay protector comprises fewer than eight peaks.
19. A bicycle as claimed in claim 12 , wherein the first contact surface has a first length that is less than two times the pitch of the chain.
20. A bicycle as claimed in claim 19 , wherein the second contact surface has a second length that is less than two times the pitch of the chain.