Cannondale fork 29 "Lefty Carbon XLR 90mm Cannondale Leftygabeln already provide many years of discussion material in the bike scene. But the stiffness, performance and light weight are undisputed.
Why is Lefty easier?
Simply because the one-arm double-bridge construction with less material gets along as a normal fork with two fork arms. All necessary components found in a fork arm into place and material can be used specifically as where the stresses are greatest. The OPI Technology (One Piece Integration), wherein the components which were previously composed of two different parts, now consist of only one component saving additional weight and increased rigidity.
Why is the Lefty rigid?
The stiffness of the Lefty is based on five points: The double bridge, the large pipe diameter, the upside-down design, the 4-socket connection between still and dip tube and the OPI technology. The double bridge design transfers the forces evenly into the oversized head tube from which then initiates this in the frame. In a standard fork this power transmitting only happens on a yoke which the force is applied unevenly. The upside-down construction moves the stable components on the fork upward where the largest forces occur. Increase control tube (1.56 "), and standpipe (1.6"), the stiffness significantly compared to telescopic forks with 1.125 "head tube. Another unique feature is the combination of state and dip tubes thereby puts a 4 square tube in a 4 square tube which by 60 needle bearing (4 strips with 15 needles) are connected to each other and a slide bearing. These two tubes are forced by their shape to deform along which the rigidity once again increased. the OPI technology on the one hand reduces the weight makes it possible to complex components be in one piece and thus adapt to the occurring loads and not for two components to do this separately, which are then also stable as possible to each other.
Why Lefty responds better?
The answer lies in the built-in each Lefty needle bearings. A normal telescopic fork is running normally on four bushes, a 29er Lefty "rolls" on 60 needle bearings. For optimum fork responds much faster and more sensitive.
New from the model year 2013, the completely revised telescope unit with "Sealed hybrid Needle Bearing Technology" which bearings and needle roller bearings for improved sealing and optimized response is connecting. Furthermore, the needle bearing the Lefty's with a self resetting function are fitted which ensures the full stroke of the telescope on a permanent unrestricted. To coarse dirt and stone to reduce the "attack" now counts a Fender in motocross style on the equipment.
The Lefty XLR takes care of the practical X-Loc lever of SRAM. To the lever there is the possibility of a finger, the fork between open and closed positions to move. In addition, the lever at a Matchmaker clamp can be attached, which makes for a neat look on the handlebar. The XLR Carbon has a OPI axle (from an aluminum forged piece axle and dip tube) and a stand pipe of aluminum. The fork is designed for brake discs up to 203 mm.
With 90 mm travel is ideal for Cross Country and Race inserts at 29er hardtail MTB.
Head tube diameter: 39,6mm
Travel: 90 mm
Suspension: Solo Air air suspension (self-adjusting positive and negative air chamber)
Attenuation: open oil bath, remote Lockout
Dip tube: aluminum, axle and dropout of aluminum
Installation height: 475 mm
Headtube distance: 134 mm
Adjustability: air pressure, lockable damper with adjustable rebound and volume compensator
Disc brake: IS-2000 mount
Max. 203 mm disc diameter
Weight: 1346g (without head tube)
You get a discount of 200 euros on a hand we have built wheelset when buying these Cannondale Lefty Gabel.