Im assuming Can. Post is cheapest but is it ?
Greyhound no longer ships across the border .
What are your experiences ?
Canada post will probably tell you that the box is too big, because they are not in the business of getting parcels from point A to point B. They're just a redistribution center for taxpayer money.
UPS is decently priced if you drop it off at a depot, as opposed to going to the 'UPS Store'. Expect the receiver to have to pay for brokerage and other fees though.
2015 Scott Foil Team Issue
2015 Kona Process 111
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Quite simply CP would be the cheapest option. If you go with CP pack the crap out of it and make sure the 'package' is bomb proof.