A consumer has no contract whatsoever with a manufacturer if they bought the goods from a 3rd party supplier.
Yes, many manufacturers will print a note about 12 months in their manual or on the box etc. but you can't actually enforce it. If this guarantee/warranty is part of the sales description, then you can claim against the supplier, as it was part of your contract. If it wasn't part of the sales description, then you don't have a leg to stand on.
However, the Sales of Goods Act protects you for six years so long as after six months you can prove the fault is an inherent defect, but again your claim is against the supplier.
The OP can try all routes, but legally the worst case outcome is the OP is put back in the position they were prior to purchasing the frame, i.e. a £650 refund, potentially with a deduction from the £650 refund for enjoyment so far.
Yes, many manufacturers will print a note about 12 months in their manual or on the box etc. but you can't actually enforce it. If this guarantee/warranty is part of the sales description, then you can claim against the supplier, as it was part of your contract. If it wasn't part of the sales description, then you don't have a leg to stand on.
However, the Sales of Goods Act protects you for six years so long as after six months you can prove the fault is an inherent defect, but again your claim is against the supplier.
The OP can try all routes, but legally the worst case outcome is the OP is put back in the position they were prior to purchasing the frame, i.e. a £650 refund, potentially with a deduction from the £650 refund for enjoyment so far.