I am training to do the Vermont Grand Fondo this year. Here are some stats about the ride:
distance: 109 miles
climbing: 10,500 feet over 4 significant gaps (10-15% average and grades up to 25%)
gravel surface (hardpack dirt road conditions): 27 miles (remainder paved)
I ride a Serotta road bike (Ti frame) and usually ride Continental Grand Prix 5000 tires (clinchers). I can only run 25 mm in the rear (clearance) and run a 28 up front.
Seeing that this is a unique ride profile, including tons of significant climbing, yet also including a significant amount of hardpacked dirt road I am wondering what tires to run? Based on all the climbing I would prefer something somewhat light (fast rolling) yet would like something with a bit of extra grip for the dirt. I realize it is greedy to expect the best of all worlds, but figured there has to be a good compromise tire that may check these marks reasonably well. So I want something super light weight, that rolls with the fastest race tires, with crazy grip on all surfaces, and incredible durability to handle all road surfaces
my searches were popping possibilities such as:
Specialized Roubaix Pro
Vittorio Rubino Pro Control
Continental 4 season
Anyone have any suggestions based on experience?