KQi Air

It has 9.5 inch tubeless tires...not the crappy solid tires. The thing weighs 26 pounds and goes 20mph. This is the final boss of last mile scooters. Its not a parts bin though so it costs a little more...Black Friday deals are coming though.

I have a NIU Kqi Air, which works fine for me, but I also only weigh 120 with gear. Mostly I ride from Caltrain to the Union Square area, so no really crazy hills. But it’s absolutely sufficient for what I want it to do.

NIU Kqi Air. Good range, 20mph speed, 26 lbs. I have one and it works great for what I do. I wish it had suspension and maybe a greater range but that would come with heavier weight.

I just got the NIU Air from Best Buy. I would highly recommend going this route based on what you have described as your use case. Should get 15 - 20 miles for an avg sized individual. I really like it. Had a few issues getting it set up but chatgpt walked me through getting my Bluetooth set up. No issues in my first week and am very impressed with how light it is. Don't wait, you can always test it out and return. I don't think you'll find anything as good for 600. I looked but all other options had more compromises (mainly solid tires which I am not a fan of).

The problems people have with it ( and apparently Niu scooters in general) with regards to the Anti Theft system being something you CANNOT disable, and constantly causing annoyances when you move it, are what stopped me from buying. Like, holy shit, who makes a scooter you can take with you, but you have to constantly keep it on or else it puts on a light show even when the alarm is muted when you nudge it funny? Did nobody actually use one IRL? The numbers SOUND great, but someone on their managerial team who said "YEP THATS FINE SHIP IT" needs to be slapped with reality.