機器
alloy
bicycle
bike
cassette
chain
chainring
chainset
chrome
circle
close up
component
cranks
crankset
cycling
drive
equipment
gear
gearing
gearshift
gearwheel
group
iron
macro
metal
metallic
mountain
mtb
nobody
object
part
pinion
race
rack
rear
ring
set
shiny
silver
spare
sports
sprocket
stainless
steel
technology
teeth
transport
vehicle
wheel