Narrow the box first
Turning the handlebars flat instead of sideways, and using a slim carton rather than a wide moving box, is the one lever that moves a bike closer to any of these lines.
Bikes, into Canada
Getting a bike into Canada by mail, and why the box is the problem
Canada is the most generous country on USPS's own list for a long, narrow box like a pair of skis. A bike carton is a different shape, and that shape is what defeats it: a standard 55 x 31 x 10 in bike box works out to 137 inches of length plus girth against Canada's 108-inch Priority Mail International ceiling, read 2026-08-19. The length alone is fine. The width is what sinks it.
Canada listing, read todayDomestic leg priced liveGirth math worked out
29 inches over the line
A bike carton clears Canada's length allowance easily and blows past its girth allowance just as easily.
Canada's mail limit, and what a bike box does against it
USPS's Individual Country Listing for Canada, read 2026-08-19 at pe.usps.com/text/imm/ce_003.htm, sets Priority Mail International to Canada at 66 lb, a maximum length of 79 inches, and a maximum length plus girth of 108 inches (girth being twice the width plus twice the height). The 79-inch length figure is generous enough that a full-size bike frame clears it on its own. Girth is a separate test, and a bike carton fails that one badly.
| Box | Length | Cross-section | Length + girth | Clears Canada's listing |
|---|---|---|---|---|
| Standard adult bike carton | 55 in | 31 × 10 in | 55 + 62 + 20 = 137 in | No, 29 in over |
| Same carton, bars laid flat | 55 in | 24 × 10 in | 55 + 48 + 20 = 123 in | No, 15 in over |
| Frame-only box, wheels removed | 44 in | 12 × 10 in | 44 + 24 + 20 = 88 in | Yes |
Trimming the cross-section helps, but not enough on a complete bike: turning the bars flat only buys back 14 inches, well short of what's needed. A frame stripped of its wheels is a different shipment entirely, closer to a bike-frame box than a bike box, and it is the only version of "a bike" that fits USPS's own mail limit to Canada. Anyone shipping a complete, ride-ready bike is choosing between a courier account and a specialist, not the post office.
What the US leg toward the border actually costs
| Carrier | Service | Price | Quoted delivery |
|---|---|---|---|
| UPS | Ground | $178.21 | 4-5 business days |
| UPS | 3 Day Select | $183.49 | 4-5 business days |
| UPS | 2nd Day Air | $203.99 | 4-5 business days |
| UPS | 2nd Day Air A.M. | $219.65 | 4-5 business days |
| UPS | Next Day Air Saver | $312.45 | 1 business day |
Only UPS priced this carton at all; USPS and FedEx returned nothing for a box this large on this lane, the same pattern our domestic bike box page found on a shorter route. That is the leg SMKlog's checkout actually sells: a US domestic parcel to a city on the way to the border, like Buffalo. Crossing the line itself is a separate step, handled by a recipient on the Canadian side, a cross-border forwarder, or a courier account booked directly with FedEx or UPS.
The courier alternative sits on the same line
A FedEx or UPS account handles oversized cartons that a mail product will not, but a bike box does not get comfortable room there either. Our international bike shipping guide found a boxed adult bike runs 130 to 137 inches of length plus girth, against FedEx's own 108-inch length and 130-inch length-plus-girth ceiling for its international parcel services, and against UPS's international Large Package line, also set at 130 inches. A bike carton sits on those figures rather than under them.
Name the duty payer
Both FedEx and UPS let a sender choose who is billed for Canadian duty and tax on the shipping label; leaving it blank defaults to billing the recipient, which is how a bike gets refused at the door.
Describe it specifically
"Bicycle" alone reads as vague to a customs officer. "Used aluminum road bicycle, disassembled" carries the detail Canadian customs and the carrier both want on the commercial invoice.
What we price, and what we don't
SMKlog's checkout is a US domestic one: it prices a box like the carton above to a US ZIP code, and nothing behind it produces a Canadian label or clears a border. What we do price well is the leg before that — a bike boxed and sent to a border-area city, a bike shop that will finish the trip, or a shipper who receives on the Canadian side.
Where these figures come from
- USPS, Individual Country Listing: Canada — 66 lb weight limit, 79 in maximum length, 108 in maximum length plus girth, and the CAD 20 / CAD 60 duty-free thresholds. Read 2026-08-19.
- Prices: our own capture of one bike carton against production on 2026-08-19, from Berkeley Heights, NJ 07922. Nothing on this page is a list price or an estimate.
- Bike carton dimensions: the same 55 × 31 × 10 in shop-standard box our bike shipping box page quoted on 2026-07-27.
USPS revises its country listings without notice. Read the live listing again before boxing a shipment close to any of these lines, and check whichever carrier is actually crossing the border for its own current size and duty rules.
Common questions
Can a boxed bike be mailed to Canada through USPS?
Not in the box most shops send it in. USPS's Individual Country Listing for Canada, read 2026-08-19, caps Priority Mail International at 66 lb, 79 inches of length, and 108 inches of length plus girth combined. A standard 55 x 31 x 10 in bike carton comes to 137 inches of length plus girth, 29 inches over the line, even though its 55-inch length alone clears the 79-inch length cap with room to spare. Girth is what fails, not length.
Why do skis clear Canada's mail limit and a bike doesn't?
Cross-section. A ski box is long but narrow, so its girth stays small even at 72 inches of length. A bike carton is wide enough to fit handlebars and a frame, and that width is doubled twice over in the girth calculation, which is why our ski shipping to Canada guide found a ski box landing exactly on the 108-inch line while a bike box sails past it.
What does the US leg toward the Canadian border cost?
$178.21 on UPS Ground for a 44 lb, 55 x 31 x 10 in bike carton, Berkeley Heights, NJ to Buffalo, NY, quoted against production on 2026-08-19. Only UPS returned a rate for this box on this lane; USPS and FedEx offered nothing. SMKlog's checkout prices United States domestic parcels only, and the hop that actually crosses into Canada is a separate booking.
Does a courier account do any better than the mail?
Marginally, and it still isn't comfortable. Our international bike shipping guide found a boxed adult bike runs 130 to 137 inches of length plus girth against FedEx's own 130-inch international ceiling and UPS's 130-inch international Large Package line, so a courier booking sits right on those thresholds rather than clear of them. Narrowing the carton by laying the handlebars flat instead of turning them buys back a few inches on either service.
What duty applies to a bike mailed into Canada?
USPS's Canada listing, read 2026-08-19, puts the duty and tax exemption at 20 Canadian dollars for general goods and 60 Canadian dollars for a gift shipment. A bike is worth more than either figure in nearly every case, so Canada Post or the courier collects duty and tax from the recipient on delivery.
