During my first season of CX racing I used 622x17mm Alex Ace 19 clincher rims with Specialized Hoffalize 32mm tires.
I’ve seen recommendations for what tire widths to run on what size rims:
622x15mm rims take 23 to 32mm tires,
622X17mm rims take 25 to 37mm tires,
622x19mm rims take 28 to 44mm tires.
And I’ve heard that wider rims reduce pinch flats.
I’m curious about the tradeoff between rim weight (estimated at -100g for 15mm and +100g for 19mm) which affects acceleration, and tire
pressure (estimated at +5lbs for 15mm and -5lbs for 19mm) which effects rolling
resistance. I assume tire choice also effect rim width selection; I’ll probably
use the very supple Challenge Grifo Open 32mm next season.
Sorry to dredge up an older thread, but would the Alex DH19's behave similarly to the Velocitys? http://www.alexrims.com/product_detail.asp?btn=4&cat=4&id=95 and other than weight would Shimano MTB (Deore type) hubs work out OK vs an Ultegra or 105 hub?