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UM4+ Men

£2,475.00 - £2,825.00 Model 24876

UM4+ is a rugged utility electric bike built with simple, long-life performance parts that make it easy to make this bike a part of your everyday routing. Internal 7-speed gearing, a low-maintenance Gates belt drive system, a powerful Bosch motor for speeds up to 25 km/h, a rear rack battery and hydraulic disc brakes give it the capability to take on daily commutes, shopping runs and more!

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It's right for you if...

You're a daily rider looking for a rugged utility bike you can depend on for everything. You're looking for a no-hassle e-bike with durable parts that won't wear out, even when they're ridden hard.

The tech you get

An Alpha Aluminium frame, a powerful Bosch Active Line Plus (250 W, 50 Nm) motor for speeds up to 25 km/h, a Walk Assist feature and your choice of a 300 Wh, 400 Wh or 500 Wh battery. Plus, internal 7-speed shifting, a durable and low-maintenance Gates belt drive system, hydraulic disc brakes for all-weather stopping power, puncture-resistant tyres, a rack, mudguards, lights, a U-lock, lock-on grips and an adjustable Blendr-compatible stem. 

The final word

If you value dependability in your utility bike, UM4+ is for you. It's built with durable parts, but it's also trimmed with touchpoints that feel great when you're riding day after day.

favorite_borderWhy you'll love it

  1. The Gates belt drive system is more durable than a standard chain, virtually maintenance-free and almost silent while you're riding
  2.  If you thought cars were essential, owning this bike will make you reconsider: with UM4+ Men's, going from home to work to the shop is all in a day's ride
  3. Smooth welds add to the aluminium frame's sleek looks
  4. Available with your choice of a 300 Wh, 400 Wh or 500 Wh battery
  5. With a pre-installed rack and mudguards, you can go from the bike shop straight to the shops with ease
  6. The Purion controller has a Walk Assist feature that helps you push your bike out of steep car parks and bike cellars



  • Frameset

    Lightweight Alpha Super Smooth Aluminium, for Belt
  • Wheels

    Front hub
    Rear hub
    Shimano Nexus 7-speed
    Alex Rims DP23
    Schwalbe Big Apple K-Guard, 700x50c
  • Drivetrain

    Shimano Nexus Revo Shifter 7 speed
    Gates CDX for Belt, 38T
    Gates 24T Steel
    Gates CDX belt
  • Components

    Selle Royal Nuvola
    Aluminium suspension
    Bontrager Ultimate Comfort Philosophy ergonomic grips
    Bontrager adjustable Blendr
    Brake set
    Shimano hydraulic disc brake
  • Accessories

    Bosch Powerpack 300/400/500 Wh
    Bosch Purion
    Bosch Active+, 250 Watt, 50 Nm
    Front light
    AXA Blueline 30
    Rear light
    Spanninga SOLO for e-bike
  • Weight

    L - 22.90 kg / 50.49 lbs
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 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, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.


Rider Height


All measurements provided in cm unless otherwise stated.

Frame size letter A — Seat tube B — Seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
M 50.0 73.0° 16.5 69.5° 57.4 29.8 6.0 48.3 4.5 8.6 112.1 77.8 38.4 62.1
L 55.0 73.0° 19.5 70.0° 56.6 29.8 6.0 48.3 4.5 8.3 113.3 81.4 39.0 65.2
XL 60.0 73.0° 23.0 70.5° 61.3 29.8 6.0 48.3 4.5 7.9 115.2 85.1 40.3 68.7

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