My modern record is 46 on Highway 246 coming into Solvang, CA. Downhill with tailwind on my 2002 Allez. Back in the day, when I wasn't very smart, my dad clocked us at 60 mph coming down White Wolf Grade, southeast of Bakersfield, CA. I was on my then new 1964 Legnano Roma, dad in his 57 Plymouth. Good times.