Vi har fått lite nyheter från Norco Bike som har tagit fram en 29" tummare för er som har gått över till denna storlek på hjulen. 

Denna hoj är byggd i Aluminium med de stora 29 tums hjul som verkar ta över då det gäller nyheter från alla företag. Denna hoj är som sagt på ett prototype stadie och kanske kommer den att se lite annorlunda ut när den är klar.

Men så här mycket vet vi om hojen som kallas för Norco Shinobi. Den har en 1 1/8 till 1,5 tums styrhuvud (Tapered Steertube) där en del av ramen är i Hydraformed aluminium. Den har Norcos nya Full-Wrap Linkage systemet som slår 120mm. På denna hoj så kan man ha en gaffel som slår 140mm. Post Mount är systemet de använder för bromsarna. Bakhjulet sitter fast med Synatace 142mm x 12 axel.

Norco Shinobi 29er

Synatace 142 x 12mm axel fastsättning

Dustan Sept skriver:

Hey Rolf.

Here’s the dirt on the new Norco.

2011 Prototype Norco Shinobi

29er Full Suspension

120mm travel frame

140mm fork

Tapered Steertube

New Hydraform Downtube

New Norco Full-Wrap Linkage design

PostMount Brakes

Synatace 142mm x 12 axle

I have had the opportunity to ride this bike recently and it is awesome! Incredibly stiff, light and the extra bit of travel with big wheels makes for avery fast, smooth ride.

Tube hydroforming

In tube hydroforming (THF) there are two major practices: high pressure and low pressure. With the high pressure process the tube is fully enclosed in a die prior to pressurization of the tube. In low pressure the tube is slightly pressurized to a fixed volume during the closing of the die (this used to be called the Variform process). In tube hydroforming pressure is applied to the inside of a tube that is held by dies with the desired cross sections and forms. When the dies are closed, the tube ends are sealed by axial punches and the tube is filled with hydraulic fluid. The internal pressure can go up to a few thousands of bars and it causes the tube to calibrate against the dies. The fluid is injected into the tube through one of the two axial punches. Axial punches are movable and their action is required to provide axial compression and to feed material towards the center of the bulging tube. Trasverse counterpunches may also be incorporated in the forming die in order to form protrusions with small diameter/length ratio. Trasverse counterpunches may also be used to punch holes in the work piece at the end of the forming process. Many industrial applications of the process can be found, especially in the automotive sector