Trek Fetch 4 Electric Cargo Box Bike 2025
Fetch 4 is an electric cargo box bike that helps you carry a lot, connect with your kids, and even replace your car. Confidently carry up to five children (max. box weight of 175 lbs.) thanks to the powerful boost of the Bosch smart system and best-in-class handling and stability. This bike is designed to grow with your family, and offers multiple configuration options for carrying your most precious cargo as your needs shift over time.
It's right for you if...
You want to use an e-cargo bike instead of your car and are looking for one that’s reliable, powerful, and has a fun, confidence-inspiring ride. You love the idea of being able to see your kids in front of you and want to use your riding time to build bonds and have fun.
The tech you get
A configurable front box with a bench and two child seats that incline individually, plus a sturdy, one-size-fits-most aluminum frame, a 750Wh Bosch PowerTube battery and powerful Bosch Cargo Line(250W, 85Nm) drive system that helps you sustain speeds of up to 20 mph, plus a smartphone controller with wireless charging and access to the Trek-Bosch app. A quiet, low-maintenance Gates CDX belt drive with a CVT hub for worry-free shifting, a suspension fork, 4-piston hydraulic brakes for confident stopping power. An adjustable dropper seatpost to easily adjust seat height, ergonomic grips, MIK HD rear rack, and a stable Trek Fetch kickstand. Two child seats are included. Child bench, infant seat adapters, and rainfly sold separately.
The final word
Fetch 4 is a powerful e-cargo box bike with thoughtful design features that make for confident rides and easy handling. With kids in front, every ride is an opportunity to connect with your family and your city. Smart customizable cargo configurations plus a powerful Bosch drive system let you carry it all everywhere you go.
Why you'll love it
- Fetch 4’s low center of gravity and cable steering deliver a stable, ultra-confident ride and exceptional handling and control no matter how much you're carrying or where you're riding
- Customize your ride with options like a child bench, infant seat adapters, and a fully-enclosed rainfly
- The two included Trek child seats have five-point harnesses, wobble-preventing headrests, and three recline positions (upright, chill mode, and sleep mode)
- The MIK HD rear rack is rated to carry an additional child seat — plus it's compatible with other MIK accessories and bags
- The Trek Fetch dual-pivot kickstand keeps the bike stable and steady while loading and unloading kids and cargo and is super easy to engage and disengage — even while fully loaded
SPECIFICATIONS
*Please note - spec applies to all sizes unless listed separately
Frameset
Frame High-performance hydroformed alloy, low-step, Removable Integrated Battery, internal cable routing, Motor Armor, post-mount disc, 148x12 thru axle
Fork SR Suntour Mobie A32, 50mm travel
Wheels
Wheel front Formula DC-71 sealed bearing, 6-bolt, 15x100mm thru axle hub, 32-hole, 30mm width rim
Wheel rear Enviolo CVP Heavy Duty, 40T spline, 6-bolt, solid axle, 36-hole, 30mm width rim
Hub front Formula DC-71 alloy, sealed bearing, 6-bolt, 15x100mm thru axle
Hub rear Enviolo CVP Heavy Duty, 6-bolt, 40T spline
Rim Alloy double-walled, 32-hole
Spokes 13g stainless steel, black
*Tire Size: One size fits most
Schwalbe Pick-Up, Addix E-Compound, ECE-R75 approved, wire bead, 20x2.15"
Size: One size fits most
Schwalbe Pick-Up, reflective, wire bead, Super Defense Carcass Construction, 60-584
Drivetrain
Shifter Enviolo Pro Manual Controller twist shift display
Crank ProWheel alloy, 170mm length
Chain ring Gates CDX, 50T
Cassette Gates CDX, 22T, steel
Pedal Bontrager City pedals
Components
Saddle Bontrager Boulevard
Seatpost TranzX JD-YSP28PLQ, 200mm travel, internal routing, 31.6mm
Handlebar Alloy, 31.8mm clamp, 25mm rise, 630mm width
Grips Bontrager Satellite Elite, alloy lock-on
Stem Bontrager alloy, 31.8mm clamp, 35 degree, 90mm length
Headset FSA Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom
*Brake rotor Size: One size fits most
Tektro wave, 6-bolt, 180mm
Size: One size fits most
Tektro wave, 6-bolt, 203mm
*Brake Set Size: One size fits most
Tektro HD-T737 4-piston hydraulic disc
Size: One size fits most
Tektro HD-E737 4-piston hydraulic disc
Accessories
Battery Bosch PowerTube 750Wh, smart system
Charger Bosch standard 4A, 110V, smart system
Controller Bosch BSP3200 smart phone grip
Motor Bosch Performance Line Cargo, smart system, magnesium motor body, 85 Nm
*Light Size: One size fits most
Herrmans MR8, 180 lumen, 60 lux LED, headlight
Size: One size fits most
Trelock LS614 with brake light
Computer Bosch LED remote, smart system
Kickstand Fetch custom double leg
Fender Trek Fetch custom
Weight
Weight 75.00 kg / 165.35 lbs
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 250 kg (551 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
