Anyone have any experience with Challenge Open Tubular (clincher) tires? I scoured the web but didn't find much in the way of reviews. I just bought a pair of Challenge Gara tires off of eBay for $55 incl shipping. That's for two tires. They weigh 220 grams and have 240 TPI. They seem pretty hard to beat at any price much less at $27.50 each. They're handmade in Thailand and supposedly Challenge makes high-end tubular tires for other brands (I suspect Continental and Vittoria based on what I've read).