All the same company. They also made the Specialized hubs and I believe the first generation Dura ace hubs. The beautiful anodizing and the smoothest bearings around though ther axles seem to be weaker than Campy. I think the Pro Am's came out in 1975 and disappeared in 1977 or so. Over the years I broke One Campy 6 speed a Pro Am 5 sp an Avocet(Ofmega?) 6sp axle and a Shimano 6sp axle. I've used mostly Shimano then Campy so the rate of failure is higher with Sunshine and Ofmega but with a non-statistically significant sample size. Brian Blum in Berkeley
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