BRITISH DESIGN | tested and ridden on the trails of planet earth

Sirius 3G R853

£395.00 £269.00

Among the best Reynolds 853 hardtail frames. Reynolds 853 and 4130 CrMo tubing. Rohloff or Shimano Alfine compatible frame. 2x WMTB Gold award. 650b/27.5″ compatible.

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OVERVIEW

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.

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 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.

GEOMETRY SCHEMATIC

geometry_29ER_w298

RECOMMENDED USE

ADVENTURE bar_5
ENDURO bar_5
XC bar_4
RACE bar_3
HYBRID bar_3
FREERIDE bar_3

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.

WHAT’S NEW?

  • Reynolds 853 butted main tubes
  • Custom tapered head tube (EC34/28.6 and EC44/40 headset)
  • Gusseted TT/HT/DT junction
  • Sliding dropouts
  • 19mm seatstays
  • 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


AWARDS & RATINGS
bikemagic_5_stars_96 bikeradar_4.5_stars bm_rated_96   wmbsiriustest

Specification of frame is subject to change without prior notice.

Size

16.5", 18.0", 19.5"

Colour

Gentian Blue (Pearlescent), Granny Smith's Acid Green, Poisoned Red Apple, Poisoned Red Apple (Soiled)


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