-
Funnily enough I work for Pinarello, but there aren’t any 5mm HS cover in stock in our UK warehouse and didn’t want to bother the guys in Treviso for a single (discontinued) small part.
The round ones are the older design, now frames come as standard with the aero teardrop HS cover made to fit Pinarello own stems that come only at -6 degrees.
As I wanted to try out different angles I thought to give your cover a try!
Tomorrow I’ll try to find a flat compression ring and let you know!
Interesting design. Normal compression rings have a flat top, not a chamfer. If you can fit a normal compression ring (probably 45°), then I probably have something that will fit, there are 12 different stock sizes so it's unlikely to need anything special order once you've got past the funny compression ring issue. There is an official Dogma slammed headset cover that's only 3mm, but the only place I can find them without trying is Glory Cycles (nice people, but a long way away) for $49.99+shipping, that probably means your local Pinarello dealer will want £50 the way these things go.