Both my kids have had hudora balance bikes with 'solid' tyres. They were great as they were so lightweight the kids could scoot about on them and have loads of fun.
Not having pneumatic tyres meant no punctures, kept the weight down and were never an issue as regards grip.
Personally I consider brakes on balance bikes pointless and a distraction - it's easier and more intuitive to brake with soles of feet at that age/speed. They'll pick brakes up soon enough when they need to.
Both kids now on pedal bikes and made the transition really quickly and easily with nay a stabiliser in sight.
This is the one our kids had, can't sing its praises highly enough.
