I reciently got a new Trek Utopia with a flat bar and I want to start riding regularly and at 25+MPH for when I ride around on the road on military bases. I reciently changed my grips from the ones that came with the bike. But I am wondering if I should get either drop down bars and/or bar ends to aid in riding. Can someone tell me what the benifits are for both? Is the reason for the drop bars so you can lower yourself while riding? does it make you go much faster? how about the bar ends? do those make you any faster or do they just assist with hills? and if so, do they a great deal? Should I have both kinds of bars? Is there an attachment that has the bar ends and drop bars in one? It already seems like my handle bar is busy with those chunkier grips, bell, headlight, and gps holder it doesn't seem like I'd have too much room left but I'd be able to side things down a little enough to put bar ends or drop bars on if it will really help. Also, What about tires? This bike came with 700c 38 tires. should i get thinner tires than my stock ones? Will it make me go faster with less effort or something? I can see why you wouldn't want big tred for the road but I dont think there is much tred on my current tires, it seems just like a medium amount like a general purpose tire.