The best replacement for gears is resistance.

The best alternatives to gears are rated as following:
★★★★★  resistance
★★★  3.73 gears
★★★  4.10 gears
★★  373 gears
★★  belts
★★  short gears
★  single speed
★  410 gears
★  3.73
★  cogs
★  4.10
★  timing chains
★  373
  air
  pulleys
  helical
  4.30
  3.42
  sprockets

Your alternative for gears is not listed? Suggest!
Speaking about gears, one probably shouldn't forget about 33's.

Other search terms related to gears and their ratings are:
★★★★★ 33's
★★★★ breaking
★★★ 35s
★★★ 35 inch tires
★★ motorcycle
★ 33 tires
★ 35 tires
You have in mind a companion for gears and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gears in all years. Click on graph for more.
gears
resistance
3.73 gears