No such thing.. biggest street tire ive seen is a 2.4 unless you dig into fatbike tires..
Theres plenty of smaller tires thatll do wjat you want.. but 2.4-2.5 is about is wide as you get there
That measurment i wrote was wrong. Im running the same wheels as sam pilgrim so i just found out what tires he runs and they are the Continental Race King 2.0 tires so all good.