Thanks for the info. I only weigh 135 lbs and "race" (average 21-22 mph) on 19 mm conti tubulars at 145 psi. I train on 23 mm Bontrager race lites at 125-130 psi. From reading all of the "no greater than 120 psi, no less than 23 mm posts,' I'm almost afraid to use my 19 mm tubulars except to go to the grocery store at moderate speed with all my hockey pads on. I will admit that cornering with my 19 mms is a little more scary than with my 23 mms. Since I only do sprint tris, I can live with the slightly "harder ride" of the 145 psi versus the 130 psi.