Sirius S6 CrMo

In 2017 we introduced  Drop Optimized Geometry ®, set a new benchmark for “long, slack, low” hardtails and painted them a hot neon pink! And the Moxie Mx3 is still, arguably, the definitive all-mountain hardtail. You’re welcome!
We know hardtails…and we were convinced that we could build a short travel bike which would once again push the limits. However, there was so much hype and hoopla surrounding long-travel ‘hardcore’ hardtails that we weren’t sure the world was ready to hear what we had to say, that is, a short -travel “long, slack, low” hardtail could open up a whole new world or riding possibilities.
The latest suspension technology means that modern short travel suspension forks might better be described as enduro-lite. So with that in mind, the Sirius S5 was about distilling the modern hardtail riding experience into a more refined machine. Less travel, broader intentions but with the progressive geometry, handling and phenomenal performance riders had come to expect from Moxie bikes.
The Sirius S5 resonated with riders far-and-wide who understood it’s potential and it turned out the world was more than ready: we couldn’t make enough, fast enough. Whether is was a blast in the woods, trail riding, bikepacking, adventure, pushing your limits or winning enduro events, the Sirius S5 hit the spot.
It was perfect, well, almost…
The Sirius S6 takes the mind-blowing S5 to the next level.
As a designer, I always aim to create the perfect frame but ultimately, it’s not until I’ve ridden several thousand KM on it that I can really evaluate the benefits of making changes to a design…and what will be involved to make them. It’s never simple.
More mounting points have been added for uncompromising carrying abilities. This required a new down tube and, once again, the S6 has maintained the clean lines that Pipedream frames are renowned for: we don’t compromise our frames by using gussets! This no-compromise approach allows us to specify multiple bosses, in key positions, on the top and bottom of the tube.
Useful things to know.
The S6 has plenty of bosses in convenient locations allowing it to carry cages for bottles or your kit. There’s a pair of bosses on the top tube; a trio and a pair within the front triangle; a trio of bosses on the underside of the down tube give a choice of two positions for a bottle cage or the option to fit a cargo cage.

Frame-only (includes sliders, bolts and guides)
29er, 27.5+ or 27.5
Optimised for a 100-120mm 29er fork.
Compatible with a 120-140mm 27.5 fork.
Our signature, drop optimised geometry.
Sliding dropouts give +16mm of chainstay length adjustment.
4 sizes (TBC).

Custom butted, heat treated, CrMo 4130.
44mm head tube (fits all steerer tubes).
CNC CS/BB yoke for compliance and tyre clearance.
4 sets of bosses for bottles or cargo cages.
Rack mounts.
Includes Boost™ axle, M12xP1.75.
Metal headbadge.

Colours.

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Optional add-on.
A rigid 29er CrMo fork is available which compliments the frame and is perfect for  load-carrying, bike-packing duties.

482mm axle to crown.
Optimised for 27.5 or 29er tyres.
29×3.0″ maximum recommended tyre.
Unicrown
Double-butted CrMo.
Tapered, 28.6/22.0mm.
Straight steerer tube, 30cm uncut.

110x15mm axle (included, M15xP1.5)
180mm post mount.
47mm rake/offset
Multiple bosses for bottle or load-carrying cages.
2 versions (rack/no-rack mounts)
ED corrosion resistant treatment.
Black.

Straight from the horse’s mouth.
“…an intelligent discussion about the modern state of the hardtail and geometry.” – Hardtail Party

Technical information data sheet.

Custom tubing.

The long read

Frame only. Images of bike for illustration only. Specification of frame is subject to change without prior notice.

Orders placed before 2pm ship the same working day. Free UK mainland delivery on orders over £75; bikes are shipped 95% assembled with a workshop build sheet.

Unused items can be returned within 30 days for a full refund.

Bought here, fitted here. Every bike gets a free first service at 6 weeks and our mechanics will set sag, cockpit and tyre pressures to your weight and riding style.

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