This coming weekend, I'm entered into a race that features almost 6000 feet of climbing over 50 or so miles. For me, this will be more climbing than I've ever encountered for a race. I've been preparing for the event the best that I can, climbing with stronger riders, lots of solo training hill climbs, working on improving my climbing technique, etc. My question pertains to my bike. I changed out the cassette from an 11/23 to a 13/26. That provides noticeable relief on the steeper climbs. Would it be adventageous to change the seat height for this event? What about tires? I'm currently using Vittoria Diamonte Pros, but I also have a pair of Vittoria Open Corse EVO-CX or Conti 4000s. Is one better than another for hill climbing and steep downhills?