Warning - dumb question to follow:
What are those short stubby barrel things found on Shimano gearshift cables and what is it that they adjust?
Should I ignorantly tamper with them and see what happens or are they set for best performance?
Also, my front deraileur has started rubbing on the chain when the gearing is set to the largest cog / smallest chainwheel ... I havent attempted to fix this one yet ... should I simply adjust the H or L screws on the deraileur or can i fix it by twiddling one of those barrels?
god i am so mechanically inept...