機器
alloy
bicycle
bike
cassette
chain
chain ring
chain wheel
chainring
chrome
circle
closeup
component
crankset
cycling
derailleur
drive
equipment
front
gear
gearing
gearshift
gearwheel
group
group of objects
iron
macro
metal
metallic
mountain bike
mtb
nobody
part
pinion
race
rack
riding
sharp
sports
sprocket
sprocket wheel
stainless
steel
technology
teeth
transport
transportation
vehicle
wheel