While I'm no new recruit, it seems like this subforum would be the best place to ask this question, in case anyone else finds themselves thinking something similar.
I jumped into Spiral Knights way too quickly when I first started, and consequently, find myself sitting here wondering what the true difference between stars and tiers are.
I've gone believing this whole time that Tiers represented if you had all 1* equipment, or all 2*, 3*, etc., but just found out only yesterday that there are only three tiers, not five.
The wiki serves no information directly about stars or tiers (or at least not on its own page).
Now I'm hopelessly lost at trying to find at what point your equipment is bumped up a tier (relative to stars).
Tier 1 is 0* to 1*
Tier 2 is 2* to 3*
Tier 3 is 4* to 5*
Does this help?