Whether or not the beadlocks is needed is personal choice imo.
I've been 1.12 60' on a 275 radial and no beadlocks. Never had an issue.
I chose beadlocks so I could swap tires at home...convenience and a time saver.
I've not seen a performance difference due to the weight of beadlocks. We're talking about 4 to 5 lbs more for a double beadlocks wheel. I've changed from one tire (24 lbs each) to a different brand that was 36 lbs. No performance loss and the tire weight is at a much larger circ. than a beadlock.
Also, NEVER use run screws on a radial tire. Here is why...