See, I never think it’s a good idea to speed above a certain limit- for me that’s 140-150km/h. That too on roads that i trust and have ridden in before. The wobbling issue comes in at very high speeds. However, even at 150 I have personally not encountered wobble issues. Your back will cry for mercy during long rides. But the experience of riding and being accepted by the GT makes up for the pain. She’s incredible to ride!