A lot of 80's and 90's tractor trailers and medium duty trucks still had 3 piece rims and people run these 65 to 80mph. I've had my 85 2.5 ton with splits going 60mph. With the overdrive in my 47 tuck I've been able to hit 60mph with no issues too. MY badly rusted rim blew apart going 15mph around a curve... Speed is not an issue as long as your rims are in good shape.
