The best replacement for shimano 105 is ultegra.

The best alternatives to shimano 105 are rated as following:
★★★★★  ultegra
★★★★  tiagra
★★★  sram apex
★★★  sram rival
★  shimano ultegra
★  sram
★  sram force
★  campagnolo veloce
  sram red
  apex
  shimano tiagra
  campagnolo centaur
  campagnolo athena
  shimano sora
  veloce

Your alternative for shimano 105 is not listed? Suggest!
Speaking about shimano 105, one probably shouldn't forget about 11-32 cassette.

Other search terms related to shimano 105 and their ratings are:
★★★★★ 11-32 cassette
You have in mind a companion for shimano 105 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of shimano 105 in all years. Click on graph for more.
shimano 105
ultegra
tiagra