Shimano C35 wheelset was announced last year I was immediately interested.
Over the past 5 years we've seen the wheels of choice go from lightweight low profile aluminum to ultra deep dish carbon aero wheels that aren't so light. It looks now like the scale has found it's balance point.
Over the past year I've become a huge fan of Shimano wheels. You won't find any flashy marketing behind them, they just get the job done, and done well.
My first experience came on Shimano's 29er wheel which led me to try the Ultegra tubeless clincher wheel which I promptly went about trying to destroy during 'cross season with a rear derailleur kicked into the rear wheel. After a small bout of breaking and replacing the damaged spokes the wheel survived into the road / gravel road season. I was really impressed how these wheels rode when they were set up with Hutichinson tubeless tires.
Shimano RS30 wheels for training. As the name suggests it is a medium profile wheel with a 30mm rim depth. I've been equally impressed with these hoops. At 1900+ grams they're stout, stiff and amazingly strong and won't break the bank.
Enter the C35. Again, as the name implies, it has a 35mm rim depth and is available in an aluminum/carbon clincher or full carbon tubular. After literally months of debate I've decided to make the jump back to tubulars for 2011 having walked away from them in the early 90's. At 1300+ grams that's a full 1.3 pounds lighter than my RS30 training wheels. The general rule of thumb is that rotating mass is four times greater than static mass, which means these wheels will make the bike feel like it's over 5 pounds lighter on race day.