The best replacement for road bike is mountain bike.

The best alternatives to road bike are rated as following:
★★★★★  mountain bike
★★★★  hybrid
★★★★  tri bike
★★  triathlon bike
★★  cyclocross
★★  fixie
★  touring bike
★  cruiser
★  hybrid bike
★  fixed gear
★  mountain bike speed
  touring
  hybrid speed
  single speed
  time trial bike
  commuter
  cyclocross bike
  mtb
  city bike
  endurance bike
  track bike
  comfort bike
  fitness bike
  mountain
  mountain bike frame size
  cross bike
  tri
  time trial
  commuter bike
  mountain bike geometry
  triathlon
  racing bike
  hybrid for triathlon
  cyclocross difference
  tt bike
  should i ride mountain bike
  trek
  flat bar
  track bike geometry
  folding bike
  mountain bike size
  tri bike speed
  tt
  urban bike
  bmx

Your alternative for road bike is not listed? Suggest!
Speaking about road bike, one probably shouldn't forget about aero bars.

Other search terms related to road bike and their ratings are:
★★★★★ aero bars
pedals
You have in mind a companion for road bike and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of road bike in all years. Click on graph for more.
road bike
mountain bike
hybrid