When i bought my bonnie in 1994 it had Cow horn Bars with a 16in rise, if i did over 60 mph it took all my strength to hang on, so changed them to 4 inch rise now im going to put the standard ones on (almost Straight) How you Yanks ride with hands and arms up in the air i wonder. Regarding the Q/mile speed, lower the bars and you will go faster take my word for it. Reg