DirtySixer's big bicycle: The world's largest bike you can buy

Bikes come in lots of different sizes. There are ones with smaller frames to accommodate shorter riders, while others are optimised for taller riders with larger frame dimensions - like the Orbea Orca that caters to Conor Dunne’s six foot seven inches frame.

Even this bike, though, pales in comparison to the largest commercially available bike in the world: the DirtySixer AllRoad in a size 5XL. Far from a marketing ploy, the bike is practically designed for riders who are between 7’1” and 7’5”.

© DirtySixer

American basketball player Curtis Johnson is a proud owner of the 5XL DirtySixer AllRoad. It looks pretty normal next to his 7'3" frame

The result is a bike that takes on mammoth proportions, but what is it like to ride? To find out, we decided to recruit two of our GCN presenters to test it out, and it was only fair that we picked them from different ends of the height scale. With the selection decided, James ‘Hank’ Lowsley-Williams and Conor Dunne put the bike through its paces - at least that was the plan, but it soon became apparent that it would be impossible for Hank, and not much easier for Conor.

Watch how they got on in the video at the top of this page, or check out a comparison between Hank’s regular Orbea and the DirtySixer below.

Hank’s Orbea Orca versus the DirtySixer

© GCN

© DirtySixer

The DirtySixer AllRoad - the biggest commercially available bike in the world

GCN x AGU Premium Thermal Polartec Cycling Vest

Making use of the unsurpassed insulation properties of Polartec Alpha — developed for the US Army —this gilet is ideal as an extra layer of protection from wind and light rain. The lining is compact and packable, as confirmed by the riders of Team Visma | Lease a Bike, who have been using it for their cold weather riding. Product Features: The Polartec Alpha Direct is a premium material that has a high insulation value and a sweat-wicking open structure whilst being highly packable. WNDPRF-X99 outer material used in the front of the jacket is windproof and water-repellent. DWR stretch back and sleeve insert provide extra comfort and breathability. Silicone grips on the bottom hem help keep the vest in place. For that extra bit of warmth you might need on wintery rides. 3 year warranty available on this product, find out more information here. Alex wears size medium, Dan wears size large.