The best replacement for tiagra is 105.

The best alternatives to tiagra are rated as following:
★★★★★  105
★★★★  sora
★★★  ultegra
★★  deore
★★  105 brakes
★★  105 cassette
★★  apex
★★  105 shifters
★  2300
★  claris
★  veloce
★  shimano 105
★  105 better
★  105 shimano
★  penn international
  sora shifters
  105 components
  international
  rival
  sram apex
  sora 2013
  shimano sora
  torsa
  sora shimano
  105 front derailleur
  105 weight
  105 group set
  sora better

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

Other search terms related to tiagra and their ratings are:
★★★★★ ultegra
★★★★★ 105
You have in mind a companion for tiagra and it is not yet here? Propose!



Google Trends

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tiagra
105
sora