Our Sirius R853 has been 650b compatible since it’s update back in January 2010 which has given us plenty of time to play around with this ‘new’ wheel size. 650b has, until recently, lived in the shadow of 29ers but that’s all changing changed and so have we.

Our reputation’s been established by building hard-riding hardtails in titanium or steel and it’s a passion. We love these artisan materials which demand both time and craftsmanship to create a Pipedream which is “about the closest thing to a custom built frame”.

So, what place does an aluminium frame have in the Pipedream line-up? Well, we only use high quality tubesets and this alloy finally allows us to build an aluminium frame with the qualities and characteristics we look for. It also gives you, the rider, another choice.

We build the bikes we love to ride – and we love long-travel hardtails. It’s a very British genre of bicycle (which probably had its’ origins in Vancouver) and it’s still our go-to bike today. Yes, we ride full-suspension too but there’s a purity – and skill required – about riding a hardtail and a deep satisfaction at the end of the trail.


First off, it’s pearl pink because of a mix-up at the paint shop but hey, it stands out in a crowd.

Fabricated from custom 6069 aluminium double-butted tubing which is around 40% stronger than 6061 of comparable gauge, we’ve stayed pretty old-school and selected round tubes where possible. The strength of the tubing allows us to achieve a frame weight of 1.59kg for the 18″ – and that’s painted weight.

The downtube is bi-ovalised and has a ‘throat’ at the headtube end for extra strength. The headtube itself is tapered with a 44/55 internal diametre (mm).

Out back there’s deep section bridgeless chainstays and round seat stays: both are double-bent and braced at the dropout on the brake side. The frame is designed for post-mount brakes and quick-release dropouts.

Effective TT length on the 18″ is 592mm/23.3″ and the frame is optimised for a 120-140mm travel fork.


Anything we say about this bike is going to be good but in a way, it’s been in development for over 4 years and as they say, “good things come to those who wait.”

Take a look at our Flickr gallery for more pictures and stay tuned for updates on it’s arrival.