Sonder Vir Fortis

Full carbon fat bike adventurer for snow, mud and sand. Make winter riding days and nights to remember. Full fat and go where no other bike can. Vir Fortis slack geometry makes for a fun characterful trail-friendly ride on wintry days. Float over surfaces on big 4.8” tyres.

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Sonder Vir Fortis

Built for exploring and Iditarod capable, Vir Fortis is a Rovaniemi 150 Arctic Winter Race Winner. It isn't your regular faceless hero.

Compatible with 4.8” tyres, Vir Fortis is set up to get you over the most challenging terrain. Vir Fortis might not be the bike you ride everyday, but it will be the bike you want to ride everyday!

Geometry with a trail riding pedigree, Vir Fortis positively encourages you to explore the outer limits of wintry trail and cross country riding. The ultimate expression of this is finding terrain which used to be a no go area for bikes - like snow, mud or sand.

The only thing wider than the grin on your face will be your tyres - and that’s as it should be. Go nice places regular bikes can’t go. Bigger tyres equals bigger adventures.

The Features

Hand laid carbon fibre frame and fork

Using Toray’s highest grade of carbon, T700, this frame is manufactured in a clinical environment to the highest standards. The result is an extremely strong, lightweight frame that is a blast to ride! Guaranteed for 5 years

Trail bike inspired geometry

The Vir Fortis take fun to the next level by slackening the bike out a bit, giving it a more relaxed, playful character. With natural air suspension from the enormous tyre volume Vir Fortis is ready to roll over all terrains.

Internally tapered head tube

Who would choose to be a head tube? You might as well step into the ring with Mike Tyson. It is a critical junction point where forces are distributed around the frame and steering precision is won or lost. Vir Fortis uses a fully integrated internal headset and a fork with a tapered carbon steerer tube to make sure you hold your line over broken ground.

Disk brake compatible

Once rolling you will be surprised by how you can carry your momentum which is why you are going to be thankful for the stopping power of disc brakes. The Vir Fortis carbon frame is fully compatible with disc brakes.