just so were clear, i have read sheldon brown and taken his advice, im still a little confused

i recently bought a 2008 motobecane le champion SL on ebay for $27. it has "semi-vertical' dropouts with a removeable derailleur hanger that i have removed. since there isnt any room to move the rear wheel, the only thing i can do is add a chain tensioner? id hate to have to add a tensioner because i enjoy the look of of a straight chain with no 'interference'

any advice, please?


btw, im new today.