Yoeleo does 50mm deep 650c tubular and clincher rims. I've just used one to make a deep section 650c for @Cycliste to go with her rear disc wheel. They do complete wheels too - on their website they only have clinchers, but I'm sure they'd build up some tubs if you asked them nicely.
Yoeleo does 50mm deep 650c tubular and clincher rims. I've just used one to make a deep section 650c for @Cycliste to go with her rear disc wheel. They do complete wheels too - on their website they only have clinchers, but I'm sure they'd build up some tubs if you asked them nicely.