Bianchisti Posted September 16, 2012 Share How do I know what band size front derailluer I need. Measured the seat tube diameter which is around 115mm? Link to comment Share on other sites More sharing options...
Leonard Posted September 16, 2012 Share Maybe if you give us the frame make, model and year it could help as well.115mm is way of. Link to comment Share on other sites More sharing options...
Bianchisti Posted September 16, 2012 Share Its a Bianchi Infinito, 2011/12. The seat post is a 36.2 Link to comment Share on other sites More sharing options...
DR ◣◢ Posted September 16, 2012 Share You need to measure the diameter of the tube and not the corcumfernce. Calculating it from 115mm you get 36.6mm diameter. Link to comment Share on other sites More sharing options...
Bianchisti Posted September 17, 2012 Share You need to measure the diameter of the tube and not the corcumfernce. Calculating it from 115mm you get 36.6mm diameter. Thanks for that. Is the 34.9 the onethat will work and need to get as that's the biggest one on here??? http://www.chainreactioncycles.com/Models.aspx?ModelID=28435 Link to comment Share on other sites More sharing options...
DR ◣◢ Posted September 17, 2012 Share Can't be 100% sure on that. Best would be to get an accurate measurement done. I take it you don't have one to use as a reference? Link to comment Share on other sites More sharing options...
Helpmytrap Posted September 17, 2012 Share Do you know someone with a vernier? Would be the best way. Link to comment Share on other sites More sharing options...
splat Posted September 17, 2012 Share Google tells me that its a 31.6mm dia seatpost and you require a 34.9mm dia clamp Link to comment Share on other sites More sharing options...
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