Trek Fetch+ 4: Everything You Need to Know

The Trek Fetch+ 4 is a Class 1 front-loader cargo e-bike. Pedal assist stops at 20 mph. There is no throttle. Trek’s US card lists a Bosch Performance Line Cargo motor, 250 watts, 85 newton-meters, a 750 watt-hour battery, and a claimed range up to 86 miles. Bosch’s own Fetch+ 4 page lists the bike at 165.4 pounds and the permissible total weight at 551 pounds. The front box is rated 176 pounds. Two child seats ship in the box. The US price this desk read was $4,999.97, marked down from $8,499.99. Eighty-six miles is an empty, easy loop. A loaded review put a full day closer to 30.

The sheet

Eighty-six miles on 750 watt-hours is about 9 watt-hours a mile. That is a light rider, a low assist, and no one in the box. ebikes.org’s Fetch+ 4 review, updated January 2024, said a fully loaded ride covered up to about 30 miles and that a gentle out-and-back of 15 miles each way was the practical day. Seven hundred fifty divided by 30 is 25 watt-hours a mile. Both numbers can be honest. They are not the same ride. Trek does not print the rider weight or the assist level on the 86.

Five kids is a configuration, not a promise

Trek’s family page says the box can carry one to four kids out of child seats, or one to three with one in a child seat if you add an adapter, and that a rear-rack child seat makes a fifth. The bike ships with two seats already in the box. The box limit is 176 pounds. Five small children can fit that sentence and still fit the scale. Five larger kids do not. Trek’s own FAQ says an adult can sit in the box if they are under that 176, and then says the bike is designed for kids and cargo, not for adults. The 551-pound system limit is the bike, you, the kids, and the groceries together. A 165-pound bike and a 180-pound rider have already used 345 of it.

Two seats are in the box when it arrives. Five kids is an accessory list plus a scale, and the scale stops at 176 pounds in front.

Class 1 is the point

No throttle and a 20 mph cutoff is why Trek can call it Class 1. That is the bicycle most shared paths mean when they say bicycles, and it is the class a lot of cities still allow where a Class 3 and a stand-up scooter are a different conversation. It will not keep up with a 28 mph commuter. It should not be unlocked to try. The kids are in a box in front of the rider. The speed cap is a feature.

Bosch’s page lists one gear and a 20-inch front wheel with a 27.5 rear. The motor is a mid-drive, so the single ratio is the ratio the motor has to live with. There is no cassette to hide in. Hills are torque and the 85 newton-meters, then they are walking. The review that logged the 30-mile day also described a belt and four-piston hydraulic brakes, a 180 mm front rotor and a 203 rear. Bosch’s 2026 page does not reprint those part numbers. If the bike in the shop has a shifter, it is not the one-gear bike Bosch listed. Look at the drivetrain before you assume a Dutch hub or a belt.

The other cargo bike, and the sale price

Fetch+ 2, on the same Trek page, is the smaller one: same class, same 250-watt Cargo motor, 85 newton-meters, a 500 watt-hour pack, a claim of up to 55 miles, and a lower sale price. The 4 is the 750 watt-hour bike and the bigger family box. A longtail puts the kids behind you. A front-loader puts them where you can see them, and it makes the bike as long as a small car. Bosch’s 165.4 pounds is a number you do not carry up stairs. You need a place to park it, a kickstand that holds a loaded box, and a path wide enough for the front track.

The US card at $4,999.97 against an $8,499.99 comparison price is a real discount if the bike you receive is the 750 watt-hour Fetch+ 4 and not a leftover 2. Trek’s online copy offers a 30-day return on a like-new bike. A dealer sale can be a different number. The Canadian card this desk saw was higher. The US cart is the price that matters if you are in the US. Range, again, is not 86 once the seats are full. Budget the 30-mile loaded day, then be pleased if the way home is easier than that.

Who it is for

Buy it if you are replacing short car trips with kids you want in front of you, you can store a 165-pound bicycle, and Class 1 is the class your streets actually allow. Do not buy it to go 28. Do not buy it because 86 miles sounded like a school week on one charge. Do not count five kids until you have added the seats and stood on a scale with them. Do not confuse it with the Fetch+ 2. And do not read $4,999 as the price after tax, a rain cover, and the rear seat that makes the fifth child legal on the rack.