edMonkey Posted March 13, 2009 Report Share Posted March 13, 2009 (edited) This is for Mod (20") bikes.Can someone explain the usual setups for sprockets and freewheels and how many teeth is preferred. I am lost. Thank you. Edited March 13, 2009 by edMonkey Quote Link to comment Share on other sites More sharing options...
Luke_zoo Posted March 13, 2009 Report Share Posted March 13, 2009 This is for Mod (20") bikes.Can someone explain the usual setups for sprockets and freewheels and how many teeth is preferred. I am lost. Thank you.18T front for a mod if you have a casset hub on the back Ffw around the same I think Quote Link to comment Share on other sites More sharing options...
forteh Posted March 13, 2009 Report Share Posted March 13, 2009 Typically for mod: -If you are using front freewheel (FFW) then you use an 18t freewheel and a 12t fixed sprocket on the rear wheel.If youre using a freehub (such as profile or chris king) then you use an 18t fixed front sprocket and a 12t driver (sprocket) on the hub.Thats about the size of it Quote Link to comment Share on other sites More sharing options...
Ben H! Posted March 13, 2009 Report Share Posted March 13, 2009 Hi mate the standard gearing for a mod bike, is an 18t freewheel (or fixed sprocket if you prefer) & a 12t sprocket on the rear.Ben. Quote Link to comment Share on other sites More sharing options...
edMonkey Posted March 13, 2009 Author Report Share Posted March 13, 2009 Thank you for your swift replies.More questions if you dont mind. would 175mm cranks fit a mod bike? im guessing no. Quote Link to comment Share on other sites More sharing options...
Jack Chinnery Posted March 13, 2009 Report Share Posted March 13, 2009 Thank you for your swift replies.More questions if you dont mind. would 175mm cranks fit a mod bike? im guessing no.As far as I know, Yes they do. Quote Link to comment Share on other sites More sharing options...
Luke_zoo Posted March 13, 2009 Report Share Posted March 13, 2009 Thank you for your swift replies.More questions if you dont mind. would 175mm cranks fit a mod bike? im guessing no.Stock or mod cranks will... I have adamant stock cranks on my python Quote Link to comment Share on other sites More sharing options...
edMonkey Posted March 13, 2009 Author Report Share Posted March 13, 2009 lovely thank you. another question then...it says in most frame specs BB+ 30mm/40mm/55mmwhat does this all mean? Quote Link to comment Share on other sites More sharing options...
Luke_zoo Posted March 13, 2009 Report Share Posted March 13, 2009 lovely thank you. another question then...it says in most frame specs BB+ 30mm/40mm/55mmwhat does this all mean? 30 + means BB rise Quote Link to comment Share on other sites More sharing options...
Jack Chinnery Posted March 13, 2009 Report Share Posted March 13, 2009 lovely thank you. another question then...it says in most frame specs BB+ 30mm/40mm/55mmwhat does this all mean?Thats BB height. Like the T-pro is +55mm.Higher is generally better for staying on the rear wheel. Quote Link to comment Share on other sites More sharing options...
middleageman Posted March 13, 2009 Report Share Posted March 13, 2009 (edited) This may help explain how BB (bottom bracket) height is measured:This Meta 20" mod has a +55mm BB height. As for the benefits and disadvantages of a low/high rise BB on a mod.... I'm sure someone else maybeable to help! Edited March 13, 2009 by middleageman Quote Link to comment Share on other sites More sharing options...
edMonkey Posted March 13, 2009 Author Report Share Posted March 13, 2009 thank you for your answers again. Feeling more confident about building something now. Quote Link to comment Share on other sites More sharing options...
A.Baxter Posted March 14, 2009 Report Share Posted March 14, 2009 When running front freewheel you will want an 18 tooth freewheel with a 12 tooth rear sprocket thats the standard mod gearing Adam Quote Link to comment Share on other sites More sharing options...
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