Do You Need a $5,000 Cargo Bike, or Can a Cargo Fork Transform Your Ride for Under $500?
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You're standing over your bike with more than it can carry — a week of groceries, a bag of potting soil — and you start doing the math on a cargo bike. Then you see the price. Five thousand dollars. For a second bike. To do the thing your current bike almost does already.
If you don't need a full time fridge or couch carrying machine, there is another option that doesn't require buying a second bike. Convert your bike into a Cycle Truck.
The bike everyone forgot about
From 1939 to 1967, Schwinn built something called the Cycle Truck. It was the workhorse of American cities — grocery boys, pharmacies, hardware stores, anyone who needed to move thirty or forty pounds across a few miles, fast. It carried up to 150 pounds. And it looked strange: a normal-sized rear wheel and a much smaller wheel up front, with a big steel basket bolted not to the handlebars.
Schwinn was blunt about why. In their own catalog they warned that "an ordinary bicycle with a basket fastened to the handlebars" was, in their words, a menace. Hang a heavy load off your bars and it levers your steering around, sits up high where it wants to tip, and turns every stop sign into a balancing act. The Cycle Truck fixed that by doing two things, and both of them came down to that small front wheel.
Why a smaller front wheel is the whole trick
Drop your front wheel from 26 or 27.5 inches down to 20, and the platform that sits above it drops with it — eight or nine inches closer to the ground. That does three things, and all three are physics, not marketing:
- It lowers your center of gravity. A heavy load carried low is much easier to manage on a bike. This lower loading height is the single biggest reason cargo forks handle the way they do.
- It carries the weight over the wheel, not off the bars. The load sits low and forward, planted over the front contact patch instead of dangling from your handlebars. This means the load is less offset from your steering axis and easier to maneuver around.
- It builds a stronger wheel. A 20-inch wheel has shorter spokes and a smaller diameter, which makes it stiffer and tougher than a big wheel built to the same standard.
None of this is new. It's the same reason almost every purpose-built cargo bike on earth uses smaller wheels. The difference is that you can get the same geometry without buying the whole bike.
The fork was a Santa Cruz idea
The Cycle Truck solved the cargo problem by building an entire bike around a small front wheel. The leap to what we do now — a fork that converts the bike you already own — happened more recently, and closer to home.
As the story is told, the cargo-fork conversion took shape right here in Santa Cruz, with a push from Josh Muir of Frances Cycles — a local builder who has spent years making small-wheel cargo machines — toward putting a flat platform over a 20-inch wheel. This became the seed for the design that Crust Bikes later put into production as the Clydesdale, the cargo fork most people know today.
We're Santa Cruz too. So when we set out to build our own cargo fork, we were picking up the concept and pushing it further.
A cargo fork, not a cargo bike
A cargo fork replaces your existing front fork and front wheel with a 20-inch wheel and an integrated cargo platform. That's it. You keep your frame, your drivetrain, your brakes out back, your saddle, your fit — the bike you already love to ride.
The catch nobody tells you about
Here's where most cargo-fork articles go quiet, so we won't. Bolting a 20-inch fork onto a frame designed for a 700c wheel changes your bike's geometry, and if you get it wrong, the bike rides wrong.
Almost every cargo fork on the market is built around one target: a 400mm axle-to-crown length and a 72-degree head tube angle. Match that and you're golden. Miss it, and the math doesn't quite work — different axle to crown length from stock will change your steering angle and your BB height. Steeper steering, twitchy at speed; slacker steering, vague and floppy. A platform that tilts because your head tube isn't 72 degrees. Other cargo forks give you one fixed length for the axle to crown, one fixed rack angle, a single axle standard, and a 33-pound load rating.
We went the other way.
How the Temper Cargo Fork is different
We designed our fork in Santa Cruz around the assumption that the fork should adjust to the bike for a perfect fit.
- Adjustable rack angle. The cargo platform is held by a rack strut with a threaded eye-bolt. Screw it in or out and the platform pivots to sit dead level — whether your head tube is 71 degrees or 74. Your groceries don't slowly side off your rack.
- Adjustable effective fork length (flip-chip dropouts). Our dropouts use flippable inserts. Flip them and the axle drops about 15mm lower in the slot, lengthening the effective fork — with a second set of ISO disc brake mounts already drilled to match the lower position. Combine that with your tire choice (anything from a skinny 20×1.75 up to a fat 20×3-plus) and one fork covers a wide range of original fork lengths instead of a single number.
- Modular dropouts. The fork ends use a removable Allotech-style insert system. Quick-release, bolt-on, 12mm or 15mm thru-axle — swap the insert to match your hub instead of buying a different fork.
- Overbuilt on purpose. Rated to carry 75 lb, and it handles its best around 50. This is a fork meant to haul weight every day for years.
The part the others don't do at all: e-bikes
Read the spec sheets on the other cargo forks and you'll notice the word "e-bike" doesn't appear. Ours was designed around it from the start.
Those flip-chip dropouts? They're built around a 12mm e-bike motor axle — the exact size a front hub motor uses. The fork has motor-cable routing and dedicated battery mounting points built into the legs and the underside of the rack. Pair it with our 20" Front Hub E-Bike Kit and you've built an electric Cycle Truck — a powered cargo hauler, out of the bike you already owned, for a fraction of what a factory e-cargo bike costs.
That's the build we're most excited about, and as far as we know, nobody else makes a cargo fork that's actually engineered for it.
Who this is for — and who it isn't
We'd rather you buy the right thing than the wrong thing from us, so here's the straight version.
A cargo fork is for you if: you've got a steel or aluminum bike you actually like; you want to haul real loads — groceries, a kid seat, tools, a case of beer and a bag of concrete — without buying and storing a second bike; or you want to build an electric cargo hauler on a budget.
A cargo fork is not for you if: you ride a carbon race bike you're not willing to change the character of; you need to carry two or three kids and a week of camping gear every day (a purpose-built cargo bike like the Omnium is what you want — and yes, we sell those too); or you're not comfortable with the fact that a conversion changes how your bike rides. It will ride differently. Better for cargo, different for everything else. That's the trade.
Questions about your bike? Email us or call (831) 200-3593. The Cycle Truck was a good idea in 1939. It's a better one now that you can put a motor on it.