Take a wheel and the pedals off, box it, and the carrier that shows up depends entirely on how big the box is. We priced two 40 lb adult bikes on the same lane on 2026-08-18: $96.76 to start for the one whose box stayed under 130 inches of length plus girth, and $200.44 to start for the one that crossed that line, with FedEx and USPS both gone from the board. That single measurement is the whole decision.
Both boxes below held a 40 lb adult bike and were quoted on the same lane on 2026-08-18. Only the tape measure explains the gap in price between them.
Take the front wheel, pedals and bars off any adult bike and it packs into roughly the same 40 lb carton either way. Between these two quotes the box grew by one inch of length and two inches each of width and depth — and that change alone decided which carriers even bid.
| Carrier | Service | Price | Quoted delivery |
|---|---|---|---|
| UPS | Ground | $96.76 | 5-6 business days |
| UPS | Ground Saver | $100.22 | 5 business days |
| FedEx | Smart Post | $118.21 | 5-6 business days |
| UPS | 3 Day Select | $174.55 | 5-6 business days |
| FedEx | Ground | $177.30 | 5-6 business days |
| Carrier | Service | Price | Quoted delivery |
|---|---|---|---|
| UPS | Ground | $200.44 | 5-6 business days |
| UPS | 3 Day Select | $292.62 | 5-6 business days |
| UPS | 2nd Day Air | $421.74 | 2-3 business days |
| UPS | 2nd Day Air AM | $482.60 | 2-3 business days |
| UPS | Next Day Air Saver | $542.83 | 1 business day |
Notice what is missing from the second board. FedEx quoted twice on the smaller box and not at all on the larger one; USPS never appeared on either, despite the smaller box sitting two inches inside its own published ceiling. On the larger box, UPS was the only carrier that answered at any price, from $200.44 on Ground up to $542.83 for next-day. Also worth noting on the smaller box: FedEx Smart Post landed on the same 5-6 day estimate as UPS Ground while costing more, so on this lane the slower-sounding name was not the cheaper one.
Length plus girth is the longest side of the box, plus twice the width, plus twice the height. On the smaller box that is 54 + (2 × 29) + (2 × 8) = 128 inches. On the larger box it is 55 + (2 × 31) + (2 × 10) = 137 inches. Nine inches of arithmetic, and it is the reason one board has five bidders and the other has one.
USPS Ground Advantage caps out at 130 inches of length plus girth and 70 lb, published on usps.com and read 2026-08-18. Both our test boxes sit inside the weight limit; only the smaller one is inside the size limit, and even that one drew no USPS rate on this lane.
FedEx's own site, read 2026-08-18, states an oversize charge applies once a package passes 96 inches long or 130 inches of length plus girth, billed at a 90 lb minimum. Our 137-inch box crosses that same line FedEx uses for its own surcharge, and FedEx returned no rate for it at all on this lane that day.
Going from 128 to 137 inches did not just remove bidders. It moved the cheapest available price from $96.76 to $200.44 — more than double — the moment the box crossed the same 130-inch mark where FedEx’s published oversize charge begins and USPS stops entirely.
FedEx sells a purpose-built bike carton at FedEx Office locations, priced by size, and its own site states plainly it will pack the bike for a small fee if you would rather not: “If you're not sure how to ship a bicycle, we'll be happy to help.” Read 2026-08-18. The alternative most riders use is free: ask a bike shop for a carton a new bike arrived in, which is the same shape and usually headed to recycling anyway.
FedEx's own guidance lists the front wheel, the pedals and the handlebars, plus any accessory that adds bulk or could puncture the box. Its site is direct about how far to go: disassembly only needs to go far enough that the bike fits the carton, not down to the frame.
FedEx caps its own branded bike box at 95 lb and allows up to 150 lb in a larger carton, per its site read 2026-08-18. An ordinary adult bike, stripped down, lands nowhere near either number — both our test boxes weighed 40 lb.
Which spacers to use in the fork, how to protect the derailleur, and the exact packing order — the bike shipping box guide and bike box dimensions guide both walk through it step by step.
Everything above assumes an ordinary bicycle. A mounted lithium battery turns the box into a dangerous-goods shipment. FedEx's own site is explicit, read 2026-08-18: lithium batteries “can only be shipped via FedEx Express services” and under its separate lithium battery guidelines, not the Ground and Smart Post tiers quoted above. Check the shipping restrictions page before boxing an electric bike, and see the electric bike guide for what changes.
Carriers revise these numbers without notice. Treat the figures above as what those pages stated on the date shown, and the prices as what our own checkout returned for the exact boxes and lane described — run your own box and ZIP codes through the calculator rather than assuming these numbers travel to a different route.
Take off the front wheel, pedals and handlebars, box it in a bike carton, and buy the label from UPS or FedEx rather than USPS — a boxed bike is almost always too large for USPS Ground Advantage. Our own quotes on 2026-08-18 ran $96.76 to $542.83 depending on the box size and speed chosen.
Both quoted a 40 lb bike box kept under 130 inches of length plus girth in our 2026-08-18 test — UPS Ground at $96.76, FedEx Smart Post at $118.21. Push the same weight into a box over that line and FedEx stopped quoting entirely, leaving UPS as the only bidder, starting at $200.44.
Keep the box under 130 inches of length plus girth. Our 2026-08-18 test priced 40 lb bikes at $96.76 in a 54 x 29 x 8 in box and $200.44 in a 55 x 31 x 10 in box — one more inch of length and two more inches each of width and depth more than doubled the price and cut every carrier but UPS off the board.
Rarely in practice. USPS Ground Advantage tops out at 130 inches of length plus girth and 70 lb, published on usps.com and read 2026-08-18, and even our smaller test box at 128 inches came back with no USPS rate at all. Budget for UPS or FedEx instead.
No. A mounted lithium battery is a dangerous-goods shipment. FedEx states on its own site, read 2026-08-18, that lithium batteries can only move on its Express network under its lithium battery guidelines. Check the shipping restrictions page before boxing an electric bike.