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