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Anatomy of a Bike



Anatomy of a Bike

 7300RED

1 saddle
2 saddle rails (saddle can be slid forward or backward along these)
3 seatpost (holds saddle and determines its tilt)
4 seatpost binder (a quick-release here allows saddle to be raised or lowered without tools)
5 seat tube (length determines frame size)
6 rear brake
7 seatstay
8 freewheel or cassette (collection of five to nine cogs of varied number of teeth)
9 rear dropout (slots in which rear hub axle fits)
10 cable housing (routes and protects wire cable)
11 derailleur adjustment barrel (allows fine-tuning of cable length; similar mechanism may be found on brakes)
12 rear derailleur (moves chain from cog to cog; controlled by right shift lever)
13 derailleur pulleys (direct chain through rear derailleur)
14 cable stop (anchors the housing for the cable to pull against)
15 front derailleur (moves chain from chainring to chainring; controlled by left shift lever)
16 pedal (flat pedals accept toeclips and straps; clipless pedals also available) chainring
17 crankarm
18 chainring
19 handlebar
20 stem (available in various heights, lengths, and rises to fine-tune fit)
21 headset (attaches fork to frame; rotates for steering)
22 top tube (length influences riding position)
23 shift lever (twist-shift; trigger shifters also available)
24 brake lever
25 shift cable
26 brake cable
27 head tube (houses fork steerer tube and headset cups)
28 fork crown
29 front brake
30 tire (less aggressive tread design than mountain bike tires for lower rolling resistance)
31 spok
32 rim
33 fork blades (rigid or suspension)
34 quick-release hub (allows wheel removal without tools)
35 down tube
36 cage braze-ons (hold bottle cage)
37 chainstay
38 chain

brakeset
(encompassing term for levers, cables, and calipers)

wheel
(encompassing term for assembled rim, spokes, and hub, with or without rim strip, tube, and tire)

crankset
(encompassing term for crankarms, chainrings, and bottom bracket)

drivetrain
(encompassing term for crankset, chain, cassette or freewheel, and derailleurs)

bottom bracket
(houses bearings and cups or retainer rings and axle that connect crankarms)