Hi all. Campy made an inner and outer chainguard for a cyclocrtoss setup. The inner one would mount on the spider arm. But it's not hard to take a used, sharkfinned 144bcd chainring and cut the worn teeth off to make a chainguard. I've done it and i'll post a pic tomorrow. The ring should be about 6-8 teeth bigger than the ring you want to use. Billy Ketchum; Chicago [where it's 50 degrees F. and the snowpack is melting and i rode 30 miles today], IL; USA.