Chiru Pulse UD Carbon Fiber 29er Released, Uses Any Bottom Bracket You Want

2011 chiru pulse 29er ud carbon fiber mountain bike

Founder Pierre Arnaud le Magnan, who we met last year at Sea Otter with his prototype 29er frame, just sent over these images of the final product: the Chiru Pulse.

Featuring a fairly unique BB shell design, the Pulse allows for use of any bottom bracket standard, including an eccentric for running it as a single speed. The seatstays are heavily flattened to absorb vibrations and provide a bit of suspension, and there’s a lot more hidden in the frame. Jump past the break to see all the details…

2011 chiru pulse 29er ud carbon fiber mountain bike

Official specs are:

  • MIX-MODULUS carbon lay-up
  • CARBOFLEX 50 seat-stays
  • Semi-integrated headset taper 1 1/8” X 44mm to 1.5” X 56mm
  • 31.6 mm seat post
  • 34.9 mm seat clamp
  • 34.9 mm front derailleur, Top Pull, High Clamp
  • 68 mm Bottom Bracket, fits GXP, BB30, PRESS FIT, Eccentric BB for single speed
  • 50 mm Chainline
  • Full carbon 160 mm rear brake mount – postmount type.
  • Replacable Aluminium derailleur hanger
  • Anti chain suck Stainless steel plate
  • Anti handle bar crash Stainless steel plate ( on top tube )
  • External Cable older ( Bottom Tube )
  • Anti slippery finish on FD area
  • Tyre Clearance : 2.35″
  • Optional bottom tube Rock Deflector

2011 chiru pulse 29er ud carbon fiber mountain bike

The CarboFLEX seatstays end up giving the bike up to 7mm of vertical rear axle movement to take the edge off.

2011 chiru pulse 29er ud carbon fiber mountain bike 2011 chiru pulse 29er ud carbon fiber mountain bike

The use of various inserts allows you to run just about any bottom bracket size you want, and let’s you swap around for future upgrades. Like Niner’s Air 9 Carbon, it gives the bike a lot of versatility and future-proofness.

2011 chiru pulse 29er ud carbon fiber mountain bike

An asymmetrical chainstay design provides a stiff bottom section for good power transfer, and the stays have ultra wide clearance so you can run some really fat tires.

2011 chiru pulse 29er ud carbon fiber mountain bike

The tapered headtube is followed by some sleek internal cable routing ports.

Chiru, named after a small animal that lives high in the Tibetan plateau and is prized for its hair. Two percent of Chiru’s bicycle sales go to support protection of these animals.

Comments

oilcanracer - 02/14/11 - 1:02pm

all this is missing is a brake brace in the rear triangle. how could you miss that on a carbon frame?

Dementia - 02/14/11 - 1:10pm

nope, it going down under the base !

[...] Chiru Pulse UD Carbon Fiber 29er Released, Uses Any Bottom Bracket You Want [...]

[...] it rains, it pours. We just posted new carbon 29er hardtails from boutique builders Momsen and Chiru, now One Ghost Industries is in on the action. We saw a prototype of this at Interbike, and now [...]

Post a comment:

Comment sections can be a beautiful source of knowledge, conversation and comedy. They can also get pretty ugly, which is why we've updated our Comments Policy. If your comment isn't showing up or suddenly disappears, you might want to check it out.