This rugged commuter bike is built for gravel – and costs less than £2,000

This rugged commuter bike is built for gravel – and costs less than £2,000

The Diamant 140 is a celebration of German brand's 140th anniversary

Scott Windsor / Ourmedia

Published: May 20, 2025 at 8:46 am

You may be forgiven for not knowing about Diamant. Even though the German brand was founded in 1885, Diamant bikes are rarely seen outside of mainland Europe.

Diamant was acquired by Trek Bikes in 2002 and it now has a range of affordable urban bikes, including ebikes.

Catching my attention from the new 2025 range is this Diamant 140, launched today and named in celebration of Diamant’s 140th anniversary.

It's described as "A tool to go out and play, ride the way you always wanted, ride where you always wanted, and for as long as your fun lasts". We're invited to "Escape your boundaries. Escape this planet – why not ride the moon?".

Urban cool

Diamant 140 GRX drivetrain
The 1x 12 GRX mechanical groupset is good to see on a bike at this price. Scott Windsor / Ourmedia

While Lunar bikepacking is somewhat ambitious, I like the Diamant's retro-inspired paintjob, gold bolts and Brooks saddle, which give the 140 a splash of urban cool.

With huge tyres, suspension and a well-appointed frame, the Diamant 140 looks bang on trend alongside cutting-edge gravel bikes such as the Lee Cougan Innova Super Gravel and Ridley’s new Ignite GTX. However, unlike those premium gravel race bikes, the Diamant is a modestly priced machine at £1,700 / €1,800.

The Brooks Cambium C17 saddle is a classy addition to the spec. Scott Windsor / Ourmedia

The chunky aluminium frameset is paired with a SunTour NX32, 75mm-travel gravel suspension fork.

The 140 rolls on 650b Bontrager/Shimano wheels with fat 2.1in tubeless Schwalbe Nobby Nic tyres. It’s driven by a 1x 12 Shimano GRX mechanical groupset.

Completing the bike is a Bontrager gravel bar, a mini-porter rack and a classy Brooks C17 Cambium saddle.

Racktime Viewit rack
The Racktime Viewit rack is minimalist and practical.


Smart price

Diamant. 140 dropouts
The dropouts show a versatile frame; it's ready for hub gears. The split seatstay makes it belt-drive compatible, too. Scott Windsor / Ourmedia

Diamant explains: "We’ve stripped this adventure gravel bike down to the essentials, but fear not. It can be fitted with anything you need or want."

The £1,700 / €1,800 price tag looks like good value, especially for a rugged commuter bike that could be a lot of fun at the weekend.

I’m certainly looking forward to getting off-grid on my next ride home, although probably not via the Sea of Tranquility.