The best replacement for belt is chain drive.

The best alternatives to belt are rated as following:
★★★★★  chain drive
★★★★★  timing chain
★★★★★  chain
★★★  orbital sander
★★★  no belt
★★★  direct drive turntable
★★★  chain garage door opener
★★★  suspenders
★★  chain garage door openers
★★  slendertone
★★  direct drive
★★  timing belt
★  shaft drive
★  contour belt
★  black belt
★  no belt with suspenders
★  shaft
★  chain bike
★  chain efficiency
★  braces
★  mix
★  no seat belt
★  sock
★  gear
  flex belt
  black mage
  lead screw
  chain spin bike
  weight vest
  torque tube
  chain garage opener
  chain timing
  baby hugger
  screw drive
  chain garage door
  shoulder belt
  paddle holster
  serpentine belt
  chain primary drive
  no belt squat
  sunbelt
  serpentine
  slendertone belt
  girdle
  oort cloud
  chest rig
  green belt
  air bag

Your alternative for belt is not listed? Suggest!
Speaking about belt, one probably shouldn't forget about buckle.

Other search terms related to belt and their ratings are:
★★★★★ buckle
★★★★★ suspenders
★★★★ removable buckle
★★★ suit
★★★ h
★★ jeans
★★ tuxedo
★★ metal buckle
★ hidden knife
★ interlocking g buckle
★ pouches
pouch
ac compressor
changeable buckle
h buckle
buckles
You have in mind a companion for belt and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of belt in all years. Click on graph for more.
belt
chain drive
timing chain