Less rotational mass isn't going to affect top speed. It will affect how fast you get there, but considering the weight of the bearing and its parts and its location (low inertial moment since its all near the center of rotation), the difference will likely be very minor. Lower friction may help with top speed, but if you can top out your gearing with OE bearings, then lower friction bearings won't do a damned thing. If you're geared such that you can actually hit an aero limited speed, then possibly.
My 2015 hits about 80-85 indicated at 8000 RPM. At 16K redline, it should be double. This does not account for any errors in the speedo. 160 to 170 seems reasonable depending on how much error there is. Of course actual ground speed may be a little different if aero drag is significant. There could be some tire slip occurring up at high speed that could cause a difference between indicated and actual, in addition to the speedo error. But in such a case, gearing limited top speed would result in lower top speed than the calculated top speed.
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That's a post directly from their website of course I don't believe everything a "seller" says about their products. It does make since with less friction it should move more freely. Re gearing and bearings are two completely different things, gearing won't give you a faster "top speed" I know. But I assume it's possible bearings could in fact reach higher top speed mph's. To what extent, who knows. But like stated, the gps and speedo were matched all the way to about 120-122 when I had to back off of it. And I assume since it has had a speedo correction on it with those ceramic bearings, I believe it when it says I'm doing 173 I really am. Lol