This is our 3rd generation Sirius, our multi award-winning Reynolds 853 hardtail frame.
Updated, tweaked and tuned, the Sirius is probably our most versatile frame in our line-up and has been our go-to weapon of choice since it’s inception in 2006. Capable of taking either 26″ or 27.5″ wheels and optimised for 130mm forks (rated to 140mm), it’ll handle just about anything on today’s trails.
Sizes available: 16.5″, 18.0″ & 19.5″
|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|
|BB Width||73 mm||Headset||EC34/28.6 and EC44/40|
|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 (sagged 20%). 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.
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.
Reynolds 853 butted main tubes
- Custom tapered head tube (EC34/28.6 and EC44/40 headset)
Gusseted TT/HT/DT junction
Bridgeless chain stays
- 2 sets of bottle bosses
Curved seatstay bridge
WHAT’S BEEN KEPT?
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
- 135mm rear axle spacing
Sirius 3G, 2011/12 model (discontinued). Current model is the Sirius 4G.