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SIRIUS R853  
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£349.00 GBP

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16.5"
18.0"
19.5"

16.5"
18.0"
19.5"

16.5"
18.0"
19.5"

Deals available on builds

 

 

SCORCHING!

All stars shine but none do it like Sirius, the brightest star in the night sky. Aptly named, Sirius comes from the Greek word Seirius, meaning, "scorching." Pretty much sums it up - and we're not the only ones to think this about our multi award-winning frame!

So, how do you improve on an already great frame? The attributes that defined it - geometry, balance, neutral handling and value - had to be preserved. But we've learned a few things in the past few years and bike technology has advanced. With that in mind, the changes had to be subtle yet significant.

So, here's our new-for-2010, Sirius [more photos here].

 
Sirius 2010 R725 Prototype - Production model, R853 & gussetted
 
WHAT'S NEW?   WHAT'S BEEN KEPT?
 
  • Reynolds 853 butted main tubes
  • Custom 4130 head tube is 20% thicker
  • Gusseted TT/HT/DT junction
  • Sliding dropouts
  • 19mm seatstays (previously 16mm)
  • Bridgeless chain stays
  • 2 sets of bottle bosses
  • Curved seatstay bridge
 
  • Classic Pipedream trail geometry.
  • Heat treated 4130 CrMo stays
  • Double bent stays (traditional 'A' seatstays)
  • Clearance for 2.5" tyres
  • 73 mm bottom bracket (BB) shell
 
AWARDS & RATINGS
 
WMTB: Gold & Value   BM: Rated   BM: 5 stars   BM: Editor's choice
 
GEOMETRY
 
Sizes available: 16.5", 18.0" & 19.5"
 
  Small Medium Large
       
A: Head Angle 69 69 69
B: Seat Angle 72 72.5 72.5
C: ST C-T 419 457 495
D: TT Length 580 592 605
E: HT Length 120 120 120
F: BB Height 317.5 317.5 317.5
G: Chainstays 413-430 413-430 413-430
H: Wheelbase 1064.9 1076.9 1089.8
       
BB Width 73 mm Headset 1 1/8"
Seat Clamp 29.8 mm Max tire 2.5"
 

See geometry schematic at the bottom of the page for more information.

The frame is disc specific and is designed to take a 90-130 mm travel fork.

For sample build click here [allow pop-ups to view]

 
COLOURS
 
  Bling Titanium
  Graphite black
  Kawasaki Green
   
 
ABOUT THE DESIGN CHANGES
 

With our acclaimed "point and pedal" geometry, our frames are built by some of the best builders in the industry.

For us, CrMo is still our material of choice as frankly, there's nothing that comes close to it in performance and value. What about Ti, you may say? Well, Ti's all well and good and still a wonderful material but the 'advantages' over high end steel are negliable. OK, so it's marginally lighter and it's corrosion resistant. Well, the steel super-alloys like Reynolds 853 and Columbus Spirit/Life are so different from ordinary Steel, about the only characteric they share is they contain iron. These steel super-alloys are one of the reasons why there's still vintage steel frames being ridden today that command premium prices after 30-40 years. Now that's a frame for life!

Our Sirius frame has just had it's first 'major' upgrade in 5 years and frankly, it was a challenge to figure out what to do. There were reasons we made the choices we did back then and we confidently stood by them. Tubing choice, geometry, intended usage were all carefully considered after considerable research, riding and prototype development. For the technically oriented, take a look at the tubing schedule here.

Why the changes? Perception is a powerful thing and is often what shapes our choices. Reynolds 853 (among few others) justifiably has a high reputation, backed up by technology, race-results and heritage. It's proven.

The first incarnation of the Sirius used 'No Hype, Just Pype' - a custom drawn, heat treated, double butted 4130 CrMo with a strength comparable to Reynolds 631. It was and is more than strong enough for it's intended use. However, our US and Japanese distributors wanted a branded tubeset which is why we built the frame in R631 for their markets.

Today, more than 5 years on, component technology has made some big advances - as has the skill level of the rider - and we know that a well designed hardtail can take the fight to the trail as well as any short/mid-travel full suspension frame. The hardtail is here to stay so why not build it with the best materials avalaible - it's going to be around for a long time.

As a final note, the sliding dropouts offer more than just singlespeed capability, 650B fit fine and offer yet another wheel choice.

Awards (above) are for the 2005-09 Sirius.

 
 
     
 
RECOMMENDED USE   GEOMETRY SCHEMATIC   BUILD KITS
         
XC
ALL MOUNTAIN
ADVENTURE
HYBRID
FREEDRIDE

This is a specialist frame designed for racing or severe applications - and a lot in between. Ideally suited to the kind of trails that have brought fame (and noteriety) to the trail centres of our wonderful land.

And lets not forget the natural wonders of this planet Earth - your 'secret trails', backwoods and hometurf, your wrecking grounds.

These frames aren't indestrucable so use within the recommended limits, take care and have fun.

 

 

Geometry

 

We are able to offer great deals on components if you're looking to 'bundle stuff' to build a Pipedream bike.

Contact us for pricing or to discuss custom bike builds.

 

 

Designed in the UK      
     
     
 
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