I have an r12 and i get speed wobbles at about the 40 kmph mark, which is 25 mph. its bad where i cant even stay against the shoulder, im afraid to. It wasnt terribly windy today, under 5mph MAX and i have 50mm deep wheels. Anyone know the cause of this or has anyone had a similar issue with other open molds? Im scared to ride it down anything steep because i went down maybe a 7-8% and held it at 40 kph and it scared the hell out of me. i had to keep touching the brakes. the handlebar/headset looked straight, i could realign it and see if it helps but im kind of out of options. I want to narrow down what the issue is though so my thought process in steps is
swap wheels - i have heavier box cyclocross ones so i can tell if its the wheels (why would it be the wheels, lol, ill put the deep dish on my gravel bike too.) Ill check my handlebar/headset after that.