E
Edward W
Guest
when sitting on the seat the shifter on your left is for the front derailleur and those are numbered 1-3 . On the right they are numbered from either 1-5 or any other combo up to 1-9 depending on your bike. The right side controls the rear derailleur on the right side of the rear wheel. You want to start out in 2 on the left and 3 or 4 on the right, this combo is good for flat land ridding . 1 on left and 1 on right would be for climbing and as you go up into the 3/5 or 3/9 gears then you are going faster on flat land....your 10-15 does not make any sense to me as there is no combonation that i know of that uses this. You either have gripshifter (twist) or trigger (rapidfire) shifters and the combonations that I have suggested will work for either one. Find the gear combo that is right for you and go with it. Remember to shift before you get going up that hill or you run the risk of ripping that rear derailleur hanger right off the bike and you dont want to do that!