I haven’t seen a spec anywhere what the max tire size is on these bikes. Will a 2.8 or 3.0 tire fit with the stock rims? Will the rock shox forks take a 29” wheel?
I think the specifications say 71mm wide tires. I do believe that is 2.8”. You might be able to squeeze in 3.0” but risk rub or mud or snow or rock clearance issues.