I’m not sure if I’m going crazy. I’m looking at a mid-00s skate magazine right now sponsored by a brand called 3120. I wouldn’t say it was all the rage back then, but it was a reasonably well known brand in skating and hip hop circles. Using ddg and qwant I couldn’t find a single relevant hit. Anyone remember?
I don’t use Instagram, but I found this with some pics of some 3120s
https://www.instagram.com/p/Ce6KuR3tL4C/
And here’s another thing about them: https://www.aliexpress.com/p/wiki/article.html?keywords=3120-skate-shoes
And someone in 2005 who was looking for them but thinks the company disappeared
https://ben.blog/2005/02/07/3120-shoes/
Not sure about the magazine though, sorry.