I took the Rebel 300 for a 50 mile ride today. At one section the speed limit was 75 so I brought it up to 70 for about 3 miles. Although I knew it could have done 75, it felt like 70 was pushing it. What would be the maximum sustainable speed for say 25-30 miles on the 300? I'm sure there are various opinions on this and I would like to hear them all.