City Champs teams are composed of players from ALL skill levels of ranked players. No matter if you are Bronze, Challenger, or anywhere in between, you can compete in City Champs (and always against players of similar skill level).
There are four tiers. You MUST be ranked to play in City Champs.
Tier 1: This tier is Team A - Ranked Gold or Above in Solo Queue
Tier 2: This tier is Team B and C - Ranked Platinum or Below in Solo Queue
Tier 3: This tier is Team D and E - Ranked Gold or Below in Solo Queue
Tier 4: This tier is Team F - Bronze and Silver in Solo Queue