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Shimano 105 groupset noob confusion

StewedHarryStewedHarry Posts: 14
edited February 2018 in Road buying advice
I'm upgrading my groupset to shimano 105 5800. I'm slightly confused about something. On the chain set options some of them say 11 speed and some of them don't. One says '53.39t 11 Speed 170mm' the other says '53/39 x 172.5mm.' Are they all 11 speed or are there some differences between the ones that say 11 speed and the ones that don't? I was under the impression that they were all 11 speed.
Thanks, any advice would be appreciated.


  • I also have another question. Why aren't there any longer cranks (175) with 53.39t, the longest seems to be 172.5 for these lengths??
  • chippykchippyk Posts: 529
    It’s the same just written in a different way. 5800 is all 11 Speed. As for crack length I recieved 172.5 instead of the 175mm I ordered, didn’t notice until I had it on the bike. CBA taking it off and I’ve not noticed any difference.
  • Thought so! ordered the 172.5 as it was £60 off. Also I realised that's what I have on my bike now.
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