Which bike for tall 6 year old learner?

My DS is 6 and v tall - 129cm with inside leg of 56cm. Until now he's had a Puky balance bike which is now way too small and I'd like to get him a proper bike for Christmas - overdue, I know. I don't know much about bikes but have been reading up and trying to figure out which one would be best for him.
From his size, it seems a 20" would be the right size but they mostly have gears which as he is just learning to ride, seems a bit much for him for now. I can see there's a 20" Islabike CNOC without gears which we could possibly stretch to, or other options with gears.
Any advice? Is it best to avoid gears for now ? Or go for one with gears but ignore them for now whilst he gets to grips with pedalling, with the aim that he'll be able to use them eventually?
TIA
From his size, it seems a 20" would be the right size but they mostly have gears which as he is just learning to ride, seems a bit much for him for now. I can see there's a 20" Islabike CNOC without gears which we could possibly stretch to, or other options with gears.
Any advice? Is it best to avoid gears for now ? Or go for one with gears but ignore them for now whilst he gets to grips with pedalling, with the aim that he'll be able to use them eventually?
TIA
0
Posts
I'm a cheapskate so my kids had a Dawes Blowfish, this passed through 3 of my children over about 5 years and was then given to a neighbour and is still going strong. They are quite heavy but built to last
Yes go for gears, gripshift easier for small ones to learn than thumb levers
HTH,
_