I have justed started modifying a 16 inch wheel bike for my youngest son (despite not being an expert in such things)
I would like some advice on optimum crank length. At the moment my son is 2 (3 in November) and is 88cm tall (just under 35 inches) with an inside leg length of 35cm (just under 14 inches). The bike is a fairly long term project, so, even though he can ride it already, I will be building it for when he is a bit bigger.
As far as I have found out, my choices are 89 or 102mm cranks from Spawn Cycles, or 115mm Sinz cranks.
The 115mm cranks are easiest to find here (UK) but I think they would be too long for him, and probably too long for the bike.
The 89 would probably be perfect for now, but maybe too small for 6 months (or so) time? The 102mm are out of stock at Spawn at the moment. Also it isn't cheap to get them posted internationally.
Any advice appreciated. I would like to learn about how different crank lengths would assist him on hills etc. He stands and pedals a lot (does stuff like dirt jumps etc), I'm guessing long cranks would make this more difficult?
Also any suggestion where I can buy very short cranks.
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