Austin's Circuit of the Americas has more fast corners than Spa and more slow corners than the Hungaroring, a blend that somewhat compromises top speed numbers.
As a high downforce venue, car set-up puts the emphasis on slow-speed grip, specifically traction at corner exit, but COTA's two DRS zones along the two longest straights help to eliminate the extra drag at high speed.
Ferrari's Kimi Raikkonen and Sebastian Vettel topped the speedtrap readings by a small margin, outpacing their Mercedes rivals by approximately 4 km/h.
Proof of the good health of Ferrari's power unit was further validated by Charles Leclerc who breezed through the speedtrap at a cool 321.7 km/h.
Red Bull's Daniel Ricciardo enjoyed a decent qualifying session, clocking in fifth overall but the Aussie's deficit to his fellow frontrunners in terms of top speed was massive, over 17 km/h!
Team mate Max Verstappen's speed was obviously impacted by his early exit from the session following his speed bump-induced suspension failure.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Formula 1 kicked off its Belgian GP weekend in earnest on Friday at Spa-Francorchamps, and…
Alpine has moved quickly to ease concerns after Pierre Gasly's heavy crash in Friday's second…
Max Verstappen opened the Belgian Grand Prix weekend by topping the first practice session, but…
Kimi Antonelli believes Mercedes found the answers it had been searching for after a dramatic…
Kimi Antonelli upped the pace in Friday’s second practice at Spa-Francorchamps, the young Mercedes driver…
Full results from Free Practice 2 for the Belgian Grand Prix at Spa-Francorchamps, round 10…