From One Drop:
“The technical idea behind the Seven Summits revision of the Summit was to take a 6061 aluminum alloy yo-yo, redesign it as 7075 aluminum alloy (heavier metal) yo-yo, but make the final result *lighter* while retaining the same profile shape. The Seven Summits are well loved.
We thought it would be cool to do the same thing for our recent super affordable release, the Intro. The redesign is called the Nitro. Clever letter switch aside, the name is very appropriate because it plays faster. Coming in at 62.4 grams (3.6 grams lighter than the Intro) it’s overall weight has been reduced significantly. The weight distribution redesign, coupled with the more dense alloy, gives it a totally new play, even though it still has the nice comfy organic feel in the hand.
The diameter and the width remain exactly the same but you will notice the cup has a slight raise in it while the Intro had a flat cup. This is your visual cue to be able to tell which is which at a glance.
The first run is very limited at 80 units.”