joshlyd1 Posted May 15, 2009 Report Share Posted May 15, 2009 Hi all I was wondering as i am converting to FFW soon I have got a tensile 18 t and was wanting to know what is a good gear ratio to use on street By the way it is a zoo ! PYTHON too.Josh Quote Link to comment Share on other sites More sharing options...
bigamac Posted May 15, 2009 Report Share Posted May 15, 2009 18:12 Quote Link to comment Share on other sites More sharing options...
Maladie Posted May 15, 2009 Report Share Posted May 15, 2009 18:12Yep, or 18:14 I think you can have if you want it a little harder. Quote Link to comment Share on other sites More sharing options...
Danny Swindlehurst Posted May 15, 2009 Report Share Posted May 15, 2009 18 : 12 no word about it! . Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted May 15, 2009 Report Share Posted May 15, 2009 Yep, or 18:14 I think you can have if you want it a little harder.no18:14 gives a lighter ratio, meaning youll gap and go no where. At a push, 18:13 makes the bike feel lighter, but 18:12 is standard by everyone Quote Link to comment Share on other sites More sharing options...
esfrost Posted May 16, 2009 Report Share Posted May 16, 2009 18/12 with 165mm cranks or 170s or even 174s. 18/13 with a 160mm. Quote Link to comment Share on other sites More sharing options...
Dan S Posted May 16, 2009 Report Share Posted May 16, 2009 18/12. classic Quote Link to comment Share on other sites More sharing options...
Maladie Posted May 16, 2009 Report Share Posted May 16, 2009 no18:14 gives a lighter ratio, meaning youll gap and go no where. At a push, 18:13 makes the bike feel lighter, but 18:12 is standard by everyoneOh right yeah ofcourse By the way, is 24:18 the same ratio as 18:12?And what about 22:16, would that be the same to?Cheers, Quote Link to comment Share on other sites More sharing options...
adam 94 Posted May 16, 2009 Report Share Posted May 16, 2009 18-12 the only choice. I used to run 19-12 with a proflie freehub on the rear a while back and that seemed ok. But ffw 18-12 Quote Link to comment Share on other sites More sharing options...
hdmackay Posted May 16, 2009 Report Share Posted May 16, 2009 Oh right yeah ofcourse By the way, is 24:18 the same ratio as 18:12?And what about 22:16, would that be the same to?Cheers,No, they aint the same.22:16 would be lighter thn 18:12 and 24:18 would be even lighter than 22:16.18:12 is definately the best gear ratio. Quote Link to comment Share on other sites More sharing options...
nickdonboy Posted May 16, 2009 Report Share Posted May 16, 2009 18 : 12 no word about it! . Quote Link to comment Share on other sites More sharing options...
RossMcd Posted May 16, 2009 Report Share Posted May 16, 2009 No, they aint the same.22:16 would be lighter thn 18:12 and 24:18 would be even lighter than 22:16.18:12 is definately the best gear ratio. Wrong Hunter they all work out exactly the same Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted May 16, 2009 Report Share Posted May 16, 2009 18 / 12 = 1.518 / 13 = 1.384624 / 18 = 1.3333322 / 16 = 1.375hope this helps.... Quote Link to comment Share on other sites More sharing options...
hdmackay Posted May 16, 2009 Report Share Posted May 16, 2009 Wrong Hunter they all work out exactly the same Actually wrong Ross. No they don't! Divide them and you will see. I think the post above this states this. Quote Link to comment Share on other sites More sharing options...
guuuuuuuuu leeeeeeeee Posted May 16, 2009 Report Share Posted May 16, 2009 hunter knows maths just use 18-12 it feels perfect thats why most riders use it Quote Link to comment Share on other sites More sharing options...
hdmackay Posted May 16, 2009 Report Share Posted May 16, 2009 hunter knows maths just use 18-12 it feels perfect thats why most riders use it Sure do. Quote Link to comment Share on other sites More sharing options...
Henrik Y Posted May 17, 2009 Report Share Posted May 17, 2009 Even if the number of tooth difference is the same but on different sized sprocket sets, it won't be the same. I was calculating on 18-15 and 22-19 and it was a difference of 4cm distance travel on a full crank rotation on a 26" bike.It sounds wrong but when you write it down on paper and calculate you will understand it, it is difficult to just imagine how it works but it has to do with the amount of teeth per full rotation.The rear 15t sprocket starts at 12 a'clock and after a full rotation on the front 18t it's 3 teeth past 12 a'clock and the same for 22-19. But when you mark out the degrees you'll see that 3 teeth on a 15t sprocket has more degrees then the larger 19t sprocket.360/15 = 24° / tooth360/19 = 18,9° / toothwith that you can calculate the difference it will be in travel distance with the size of the wheel. Quote Link to comment Share on other sites More sharing options...
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