750 single disc. Have to say though that the braking is excellent, no issues there. My first Duke and a retro one at that, not the best bike I have ever riden, but it has something that none of my other bikes have. Cool factor, Jesus this thing is friggin cool, I have people clapping as I go by, one bloke actually stopped and clapped. Another, stopped and said wow, so many people saying beautiful, amazing. This is the coolest bike I've owned, I'm sure there are cooler bikes out there, but for me, numero uno.