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  • Drivetrain-side view of the Orbea Diem 20 2027 in Ivory White.
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Orbea

Orbea Diem 20 2027

Orbea Diem 20 2027

£3,959.00
£3,959.00
Sale Sold out
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Out of stock

SKU: U37503WM

Barcode: 8434446144615

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The Diem 20 is the belt-driven choice for regular journeys around town. Its Gates CDX belt runs without chain oil, while Shimano's Nexus Inter-5 Di2 gearing keeps the gears inside the rear hub. You choose the shift with an electronic control; the Shimano EP600 motor supplies assistance through a 630Wh battery.

That combination suits commuting and errands where you want simple daily use and fewer exposed drivetrain parts. Orbea's Diamond Glide frame and carbon fork help smooth uneven roads, with lights, full mudguards, a stand and a 20kg-rated rear rack included. The belt still needs care and correct tension, but there is no oily chain to brush against your clothes.

The integrated Spinblock limits handlebar rotation to make loading the bike easier. A USB-C outlet lets you charge a phone on the move, with an SP Connect SPC+ mount supplied to keep it in place.

The manufacturer product photographs show Vittoria e-Randonneur tyres. This build is specified with Schwalbe Marathon 50-622 tyres; the specification chart describes the supplied build.

The riding photograph is from Orbea's earlier Diem campaign and shows different equipment and accessories. Bags, bottles and other accessories shown are not included unless listed below.

Paint finishes

  • Ivory White (Gloss)
  • Spaceship Green (Matt)
  • Anthracite Glitter (Gloss)

Additional specification

Display
Shimano EN500
Charger
Orbea 2.Generation eBike Smart charger 42V/2-4A
Phone mount
Smartphone mount SP Connect SPC+
Rear light
Orbea Fender integrated, with alert light
Pedals
VP-836
Rear carrier
Orbea RR-01 Alloy, with Mik & Mik Side and Ortlieb QL3.1 system. Max. 20Kg
Mudguard
Curana Apollo Orbit 60mm
Position light
Orbea integrated, USB-C charging point
Front light
Supernova Starstream low-beam headlight
Chainguard
Gates CDS
Kickstand
Orbea Diem Integrated
Bell
Knog Oi Small Flat

Geometry

Frame geometry by size
Measurement S M L XL
Seat Tube (C-T) (mm) 442 468 490 540
Top Tube (EFF) (mm) 586 610 634 659
Head Tube (mm) 164.1 187.4 210.6 233.7
Chainstay (mm) 435 435 435 435
Bottom bracket drop (mm) 82 82 82 82
Bottom bracket height (mm) 279 279 279 279
Wheelbase (mm) 1102 1121.6 1140.8 1159.5
Head Angle (°) 69 69.5 70 70.5
Seat Angle (°) 74.7 74.3 74 73.7
Rake (mm) 50 50 50 50
Standover (mm) 672 686 700 713
Reach (mm) 422 438 454 470
Stack (mm) 601 625 649 673
Fork Length (mm) 410 410 410 410

Size guide

Orbea gives these rider heights as an approximate guide.

Orbea rider-height guide
Frame size Rider height
S 153-172 cm
M 164-183 cm
L 176-195 cm
XL 187-204 cm
View full details

Highlights

  • Frame material

    Aluminium

  • Motor brand

    Shimano

  • Battery capacity

    630Wh

Specifications

  • Orbea Diem 20 2027

    Frame

    Orbea Diem Diamond Glide, hydroformed 6061 aluminium, polished; integrated kickstand

    Fork

    Orbea Diem carbon fork, full carbon, post mount disc mount, Thru Axle 12x100mm, thread M12x1. Long mudguards compatible.

    Handlebar

    Orbea Urban, Integrated Light, Backsweep 30, Rise 50, Width 720

    Headset

    FSA 1-1/2" Integrated Aluminium Cup

    Brakes

    Shimano MT200 Hydraulic Disc

    Shifter

    Shimano EN600-R control; UR510 Di2 five-speed shift unit

    Crankset

    Shimano Steps EM600, Gates CDX 42t w/chainguard front belt sprocket

    Cassette

    Gates CDX 34t rear belt sprocket for Shimano Inter-5

    Chain

    Gates CDX Belt

    Seatpost

    Alloy, 31.6mm, Setback 0

    Saddle

    Selle Royal Essenza 271x185mm

    Rear hub

    Shimano Nexus Inter-5 Di2

    Rims

    Alloy, 25c, 32H

    Rear rim

    Alloy, 25c, 32H

    Front tyre

    Schwalbe Marathon, 50-622, reflective tape

    Rear tyre

    Schwalbe Marathon, 50-622, reflective tape

    Motor

    Shimano EP600

    Battery

    Orbea 630 Wh Battery
Close-up of the Shimano Inter-5 rear hub and Gates belt on the Orbea Diem 20.

A belt for everyday journeys

The Gates CDX belt replaces the oily chain, and Nexus Inter-5 Di2 keeps the gearing enclosed in the rear hub. An electronic shift control gives you five distinct gears. It is a practical combination for frequent commuting, with belt care and tension checks still part of ownership. The image shows the Inter-5 belt-drive layout with a cable selector; this build uses Di2 electronic shifting.

Close-up of the Orbea Diem Diamond Glide frame junction beside the rear mudguard.

Take the edge off city streets

Orbea's Diamond Glide aluminium frame is shaped to allow controlled vertical flex, while the carbon fork helps absorb road vibration. Together with the wide tyres, it makes rough surfaces less intrusive without adding a suspension fork.

Detail of the Shimano EP6 motor housing within an Orbea Diem frame.

More battery for regular journeys

The Shimano EP600 motor works with a 630Wh battery, giving the Diem 20 and 10 more battery capacity than the Diem 30. It is useful for longer days or repeated journeys between charges; actual range depends on the route, load and assistance level.

Illuminated light integrated into the Orbea Diem cockpit.

Lighting built into the bike

Diem's wrap-around position lights help make the bike visible from the side as well as ahead and behind. The rear light brightens under braking, and the headlight activates automatically in low light. The lights form part of the bike, rather than another set to fit and remove for each journey.