| No. | Term | Definition |
|---|---|---|
| 1. | Aero bars | Handlebar extensions for aerodynamic riding. |
| 2. | Aero tuck | Low posture to reduce wind drag. |
| 3. | All-road | Road-focused bike for mixed surfaces. |
| 4. | Allen key | Hex wrench for bike bolts. |
| 5. | Anchor bolt | Bolt securing brake or derailleur. |
| 6. | Anti-seize | Paste preventing threaded parts from sticking. |
| 7. | Apex | Tightest point of a corner. |
| 8. | Attack | Sudden acceleration to break away. |
| 9. | Axle | Shaft supporting a wheel hub. |
| 10. | Backpedal | Pedal backward without driving wheel. |
| 11. | Bailout gear | Very easy gear for steep climbs. |
| 12. | Bar tape | Wrap for drop handlebars. |
| 13. | Bar-end plug | Plug closing handlebar ends. |
| 14. | Base bar | Primary bar on triathlon bike. |
| 15. | Bead | Tire edge that seats on rim. |
| 16. | Bearings | Rolling elements reducing friction in joints. |
| 17. | Bib shorts | Cycling shorts with shoulder straps. |
| 18. | Bleed | Remove air from hydraulic brakes. |
| 19. | Bonk | Sudden energy crash from low glycogen. |
| 20. | Bottom bracket | Bearing assembly for crank spindle. |
| 21. | Braze-on | Frame-mounted fitting for a component. |
| 22. | Breakaway | Small group riding ahead of pack. |
| 23. | Breeze-through | Coast through without braking. |
| 24. | Cadence | Pedal revolutions per minute. |
| 25. | Calliper brake | Rim brake using two arms. |
| 26. | Cassette | Stack of rear sprockets. |
| 27. | Chain | Links transmitting power to drivetrain. |
| 28. | Chainring | Front sprocket attached to crank. |
| 29. | Chainstay | Frame tube from BB to rear axle. |
| 30. | Chamois | Padded insert in cycling shorts. |
| 31. | Chicane | S-bend used to slow riders. |
| 32. | Clincher | Tire using bead and inner tube. |
| 33. | Clipless pedals | Pedals that lock to cleats. |
| 34. | Cobbles | Rough cobblestone road surface. |
| 35. | Compact crank | Smaller chainrings for easier gearing. |
| 36. | Countersteer | Steer briefly opposite to initiate turn. |
| 37. | Crest | Top of a climb. |
| 38. | Crosswind | Wind blowing from the side. |
| 39. | Cyclocross | Racing on mixed terrain and obstacles. |
| 40. | Dab | Touch foot down for balance. |
| 41. | Derailleur | Gear-changing mechanism moving the chain. |
| 42. | Descending | Riding downhill. |
| 43. | Drafting | Riding in reduced wind behind others. |
| 44. | Drivetrain | Parts transmitting pedaling power. |
| 45. | Drop bars | Curved road handlebars with drops. |
| 46. | Drops | Lower curved part of drop bars. |
| 47. | E-bike | Bicycle with electric assist motor. |
| 48. | Echelon | Diagonal formation in crosswinds. |
| 49. | Endo | Front-flip crash over the bars. |
| 50. | Endurance bike | Comfort-oriented road bike geometry. |
| 51. | Energy gel | Quick carbohydrate packet for riding. |
| 52. | Feed zone | Designated area for taking food and bottles. |
| 53. | Fixed gear | Single gear with no freewheel. |
| 54. | Flat kit | Tools and spares for punctures. |
| 55. | Flat pedals | Platform pedals without cleat retention. |
| 56. | Fork | Front frame part holding front wheel. |
| 57. | Frame size | Measured size indicating bike fit. |
| 58. | Freehub | Hub body allowing coasting. |
| 59. | Friction shifting | Non-indexed shifting by feel. |
| 60. | Gatorskin | Common puncture-resistant tire type. |
| 61. | Gear inches | Gearing measure based on wheel diameter. |
| 62. | Gear ratio | Front teeth divided by rear teeth. |
| 63. | Granny gear | Lowest gear for steep climbs. |
| 64. | Gravel bike | Drop-bar bike for unpaved roads. |
| 65. | Group ride | Organized ride with multiple cyclists. |
| 66. | Headset | Bearings allowing fork to turn. |
| 67. | Heart rate zone | Intensity range based on heart rate. |
| 68. | Hoods | Brake-lever tops on drop bars. |
| 69. | Hub | Center of wheel with bearings. |
| 70. | Hydration pack | Wearable water reservoir with hose. |
| 71. | Index shifting | Click-based shifting with fixed positions. |
| 72. | Inner tube | Inflatable tube inside a clincher tire. |
| 73. | Intervals | Structured repeats of hard and easy efforts. |
| 74. | Jersey pocket | Rear pockets on cycling jersey. |
| 75. | Jump | Short sprint acceleration. |
| 76. | Kickstand | Support leg to park bike. |
| 77. | King of the Mountain | Climb competition classification in races. |
| 78. | Kit | Cycling clothing set. |
| 79. | Lead-out | High-speed pull setting up a sprint. |
| 80. | Lube | Lubricant for chain and moving parts. |
| 81. | Lug | Joint piece connecting frame tubes. |
| 82. | Manual | Lift front wheel without pedaling. |
| 83. | Massage the brakes | Light braking to control speed. |
| 84. | Mechanical advantage | Leverage affecting braking or shifting force. |
| 85. | Mountain bike | Bike designed for off-road trails. |
| 86. | Mudguard | Fender blocking water and mud spray. |
| 87. | Neutral support | Race service providing wheels and repairs. |
| 88. | Nipple | Spoke-end fitting for tensioning. |
| 89. | No-drop ride | Group ride that waits for everyone. |
| 90. | Nose of saddle | Front tip of a bike seat. |
| 91. | Off-camber | Sloped surface pushing bike sideways. |
| 92. | Overgeared | Using too hard a gear. |
| 93. | Oversteer | Rear wheel slides outward in a turn. |
| 94. | Pace line | Rotating single-file drafting line. |
| 95. | Peloton | Main group of riders in a race. |
| 96. | Pinch flat | Tube puncture from rim impact. |
| 97. | Puncture | Hole causing a tire to lose air. |
| 98. | Q-factor | Distance between pedal attachment points. |
| 99. | Quick release | Lever-operated wheel or seat clamp. |
| 100. | Quiver | Collection of bikes for different uses. |
