Laurence--Trials Posted March 15, 2010 Report Share Posted March 15, 2010 I'm making a bike rack at school for my D.T course work and because im getting a new bike soon (the because - trial 24") i need to know the length of the down tube. I need to know the down tube length from the head tube (the closest bit to the rear wheel if that makes scence) to the BB. If you cant get the mesurment tonight and you can tomorrow could you please email it to " LKnight.trials@googlemail.com " Thanks, Laurence. Quote Link to comment Share on other sites More sharing options...
Trials Punk Posted March 15, 2010 Report Share Posted March 15, 2010 (edited) Without ever seing one, i've calculated it to be between 610 and 620mm. Geo on tartybikes says centre of bb to centre of the top of the steerer tube is 650mm. Radius of bb shell is 17.5mm i think and the radius of the steerer is 14.3. Gives 618.2mm but you need to take into account your measuring to the bottom(ish) of the steerer tube. I'd lean towards 615mm. Edited March 15, 2010 by Trials Punk Quote Link to comment Share on other sites More sharing options...
Laurence--Trials Posted March 15, 2010 Author Report Share Posted March 15, 2010 Thank mate cheers for your help Quote Link to comment Share on other sites More sharing options...
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