Ergonomic bicycle handlebar and cycling systems
An ergonomic and aerodynamic bicycle handlebar system having appropriate sweep angles and slope angles, embodiments of which can vary both for the type of application and the width of the bar, provides improved energy efficiency, comfort and increased center of gravity control. Flare angle and drop angle can also be adjusted for particular applications. The handlebar may be made of carbon fiber or other suitable materials. Various alternative embodiments are disclosed for drop handlebars and mountain bike handlebars.
1. A bicycle handlebar comprising:
a stem clamp portion substantially bisected by a sagittal plane, the stem clamp portion being fixedly disposed between symmetrical left and right top portions wherein each of the left and right top portions comprises an inner portion and a central grip portion,
the left inner portion extending forward, upward, and to the left relative to the stem clamp area and having an upper end,
the right inner portion extending forward, upward, and to the right relative to the stem clamp area and having an upper end,
the left central grip portion formed integrally with and connected to the left inner portion at the left inner portion's upper end and extending to the left therefrom with a slope angle relative to the sagittal plane of between five and sixty degrees and a sweep angle relative to a plane orthogonal to the sagittal plane of between four and forty-five degrees,
the right central grip portion formed integrally with and connected to the right inner portion at the right inner portion's upper end and extending to the right therefrom with a slope of between five and sixty degrees and a sweep of between five and sixty degrees, and
wherein the left central grip portion and the right central grip portion have a substantially wing-shaped cross-section and a cavity is formed between the left and right inner portions, and,
a frontal bar enclosing the cavity, the frontal bar extending either between the left central grip portion and the right central grip portion or between the left inner portion and the right inner portion.
2. The bicycle handlebar of claim 1 wherein the wing-shaped cross-section has a thickness of approximately one-third of the width.
3. The bicycle handlebar of claim 1 further having left and right shoulder portion and left and right drops formed integrally with and outward from, respectively, the left and right central grip portions.
4. The handlebar of claim 1 further having a frontal bar extending between the left central grip portion and the right central grip portion and enclosing the cavity therebetween.
5. The handlebar of claim 4 having a mount formed centrally in the frontal bar, the mount configured to hold one or more cycling accessories.
6. The handlebar of claim 4 further comprising left and right shoulder portions connecting left and right drops to, respectively, outward ends of the left and right center grip portions and wherein the frontal bar is arcuate and extends forward of the left and right shoulder portions and the left and right drops.
7. The handlebar of claim 1 further having a frontal bar extending between the left inner portion and the right inner portion and enclosing the cavity therebetween.
8. The handlebar of claim 7 having a mount formed centrally in the frontal bar.
9. The handlebar of claim 7 wherein the frontal bar is configured to extends no farther forward than five centimeters beyond a front axle of a bicycle upon which the handlebar is configured to be mounted.
10. The handlebar of claim 1 further having a thumb index formed substantially at each of the junction of the left inner portion with the left central grip portion and the junction right inner portion with the right central grip portion.
11. The handlebar of claim 10 wherein thumb indices are formed in an inner sidewall of each of the left inner portion and right inner portion.
12. The handlebar of claim 1 wherein a stem is formed integrally with the stem clamp portion.
13. The handlebar of claim 1 comprised of carbon fiber-based material.
14. An integrally formed bicycle handlebar comprising:
a stem clamp portion substantially bisected by a sagittal plane, the stem clamp portion being disposed between symmetrical left and right top portions wherein each of the left and right top portions comprises an inner portion and a central grip portion, each of the central grip portions having a substantially wing-shaped cross-section,
the left inner portion extending forward, upward, and to the left relative to the stem clamp area and having an upper end,
the right inner portion extending forward, upward, and to the right relative to the stem clamp area and having an upper end,
the left central grip portion connected to the left inner portion at the left inner portion's upper end and extending to the left therefrom,
the right central grip portion connected to the right inner portion at the right inner portion's upper end and extending to the right, and
an arcuate frontal bar connecting the left center grip portion and the right center grip portion with a front surface that extends forward of the remainder of the handlebar.
15. The handlebar of claim 14 wherein the arcuate frontal bar comprises a mount configured to support cycling accessories.
16. The handlebar of claim 14 further comprising thumb indices on inner sidewalls of the left and right inner portions.
17. The handlebar of claim 14 further comprising left and right transition portions connecting left and right drops to, respectively, outward ends of the left and right center grip portions.
18. The handlebar of claim 14 further comprising left and right outer grip portions extending outwardly from, respectively, left and right central grip portions along a substantially straight line.
19. The handlebar of claim 18 wherein the left and right outer grip portions have upsweep and backsweep.
20. The handlebar of claim 18 wherein the left and right outer grip portions have an upsweep of up to positive 25 degrees and a backsweep of up to positive 45 degrees.
21. An integrally formed handlebar comprising
a stem clamp area having a stem clamp axis, the stem clamp area being fixedly disposed between symmetrical left and right grip portions wherein each of the left and right grip portions comprises an inner grip portion and an outer grip portion,
the left inner grip portion extending upwardly and forward relative to the stem clamp axis and to the left of stem clamp area,
the right inner grip portion extending upwardly and forward relative to the stem clamp axis and to the right of the stem clamp area,
the left outer grip portion connecting to the left inner grip portion at the left inner grip portion's most forward and upward point and extending to the left therefrom with a downward slope and a backward sweep,
the right outer grip portion connecting to the right inner grip portion at the right inner grip portion's most forward and upward point, and extending to the right therefrom with a downward slope and a backward sweep,
an arcuate frontal bar connected between the left and right grip portions substantially at the junction of the respective inner grip portions and the respective outer grip portions, a left drop affixed to the leftmost end of the left outer grip portion, and a right drop affixed to the rightmost end of the right outer grip portion.
22. The bicycle handlebar of claim 21 having a sweep in the range of 4 to 45 degrees and a slope angle in the range of 5 to 15 degrees.
23. The bicycle handlebar of claim 21 having a sweep in the range of 4 to 30 degrees and a slope in the range of 5 to 60 degrees.
24. The bicycle handlebar of claim 21 having a sweep in the range of 4 to 30 degrees and a slope in the range of 5 to 30 degrees.
25. The bicycle handlebar of claim 21 wherein a front surface of the arcuate frontal bar extends forward of the left and right drops and the left and right outer grip portions.
26. The bicycle handlebar of claim 21 wherein the outer grip portions have a wing-shaped cross-section with a cross-section width no more than three times the cross-section height.