Sold Diamondback Octane 20 kids bike

I think it depends on your kids height for his age. My eldest turns 11 next week and he has only just grown too tall for it but he's small for his age at just under 1.4m.

I reckon around ages 6-9 or 10.
 
Still interested. Will come back to you after I've spoken to the wife. The oldest is too big but the youngest may be ideal.
 
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