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SIRIUS R853  
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£395.00 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, 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! - Read the Bikeradar review

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 are subtle yet significant. Enjoy!

 
Sirius 2010 R853 - WMTB Test Winner
 
WHAT'S NEW?   WHAT'S BEEN KEPT?
 
  • Reynolds 853 butted main tubes
  • Custom tapered head tube (34/44 id)
  • Gusseted TT/HT/DT junction
  • Sliding dropouts
  • 19mm seatstays
  • 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
 
"...the redesigned Sirius [R853] delivers in spades."
What Mountain Bike Magazine 09/10
 
AWARDS & RATINGS
 
Bikeradar 4 Stars   WMTB: Gold & Value BM: 5 stars  
 
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"
 

All angles are based on a 480mm (axle to crown) fork height or a 130mm travel suspension fork.

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
 
  Pearl Blue
  Ruby Red
  Kawasaki Green
R853 R631  
 
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 comparisons data.

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.

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

Bicycle Trivia: CrMo steel really is a super-alloy. 4130 CrMo steel has a tensile strength roughly 15% greater than 3Al/2.5V Titanium. Reynolds 853 is more than twice as strong as 3Al/2.5V and 25% stronger than 6Al/4V Ti. For more, click here.

  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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