Whilst these stabilisers are, PROBABLY, THE MOST ROBUST I HAVE SEEN, due to the length of the uprights, THEY ARE NOT SUITABLE FOR A 12 inch BICYCLE. Since most - if not all - 12 inch bicycles are fitted with a chain guard, it is also necessary to modify the chain guard to facilitate the fitting of the "Anti-rotation" arm and the lateral stay. In my opinion, the length of the upright and it's position on the smaller cycle PRESENTS A SIGNIFICANT POTENTIAL HAZARD TO A SMALL RIDER OR TO ANOTHER CHILD FALLING AGAINST IT - THESE UPRIGHTS ARE MADE OF SUBSTANTIAL STEEL! Having spoken with the Importer/Distributor of this product, I find that they have - and are happy to provide - a product specifically designed for 12 inch bicycles! This, smaller, stabiliser is also robustly made but, will not fit a larger bicycle and, does not require the chain guard to be modified. Perhaps Amazon ought to stock this item too.