I haven't looked at all, do they sell tire liners for fat tires? If so I'd be installing them. Rad bikes seems to be a good company and quality bikes at a decent price.
Tuff liners are the strip ya put in the tire but
www.tannusarmor.com is the best liner to use
Rad Power Bikes sells Tannus Armor Liners
I'm gonna get some
They make the tire a little softer but off road bikes Mtn Bike, Fat Tire bikes run low tire pressure anyways
This July I will have had my Rover for 2 years and in 3K miles, 80% of it off road, I have gotten 5 flats,
Slime saved me 4 of those times and got me home but Slime is temp and the tube needs to be patched anyways.
I know when I get a puncture because I'll see a slime wet spot on the tire.
IMO Tannus Armor is gonna be worth it, just to not have to fix a flat
I'm not gonna run Tannus Armor on my Whizzer because it makes the tire too soft