Best of luck. I quit 2 years ago, and it is very hard but very much worth it. I still crave the damn things (tobacco is my favorite vegetable), but you learn to manage.

Your brain plays crazy tricks on you when you quit. I would find myself thinking, "You are doing so well not smoking, you deserve a cigarette as a reward". Somehow it made perfect sense. The other thing that is hard is realizing how much the length of time it takes to smoke a cigarette has become one of the stock timing devices in your life. I felt way out of synch when I quit. Maybe that doesn't make much sense.

Keep it up. You will feel better and you will ride longer. Whenever you want a smoke bad, get on your bike and ride to exhaustion. Exercise does help.