Head tube

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And you can see more from auto racing parts allison transmission parts campagnolo record brakes cadillac wire wheels camaro rear axle trailer jack wheel benz spare parts bike disc brake hydraulic hammer parts A bicycle head tube with a partially installed bicycle headset, the locknut has yet to be fitted onto the fork steer tube.In vehicle frames, most commonly of a bicycle or motorcycle[1], the head tube is the outer tube within which the steer tube pivots.The head badge of a bicycle is mounted on the head tube.Contents1 Bearings 1.1 Bicycles 1.2 Motorcycles 2 Angle 2.1 Bicycles 2.2 Motorcycles 3 Sizes 3.1 Bicycles 3.2 Motorcycles 4 References 5 See also // BearingsThe head tube holds the bearings which allow the front fork steer tube to pivot freely.BicyclesIn bicycles, these bearings are collectively called the headset. These are usually ball bearings, although some headsets use needle bearings.[2]MotorcyclesIn motorcycles, these bearings are also referred to as steering head bearings[3] or steering neck bearings.[4] These are usually tapered roller bearings.AngleThe steering axis angle, also called caster angle, is the angle that the head tube and hence the steering axis makes with the horizontal or vertical, depending on convention. The steering axis is the axis about which the steering mechanism (fork, handlebars, front wheel, etc.) pivots.BicyclesIn bicycles, the steering axis angle is called the head angle and is measured clock-wise from the horizontal when viewed from the right side. A 90 head angle would be vertical. For example, Lemond[5] offers:a 2007 Filmore, designed for the track, with a head angle that varies from 72.5 to 74 depending on frame size a 2006 Tete de Course, designed for road racing, with a head angle that varies from 71.25 to 74, depending on frame size. MotorcyclesIn motorcycles, the steering axis angle is called the rake and is measured counter-clock-wise from the vertical when viewed from the right side. A 0 rake would be vertical. For example, Moto Guzzi[6] offers:a 2007 Breva V 1100 with a rake of 2530 (25 degrees and 30 minutes) a 2007 Nevada Classic 750 with a rake of 27.5 (27.5 degrees) SizesHead tubes can use one of several size standardsBicyclesThe head tube of a bicycle is sometimes designated by the fork steerer column it accepts. This can lead to confusion, since head tube inside diameters are dependent on the headset standard. For example, frames that take 1" steerer columns can have three different inside diameters for threaded and threadless headsets (not including integrated-type headsets). The wide variety of integrated and non-standard, proprietary headsets that some frame manufacturers have created (and abandoned in some cases) makes listing all current and past head tube dimensions problematic. The following table includes the most common sizes; nominal head tube diameters are assuming a 0.1-0.2 mm interference fit, which is what most head tube reaming cutters are designed to bore. Adequate press fits are typically between 0.1 and 0.25 mm of interference.Steerer column nominal ODHeadset standardHead tube nominal ID1"/25.4 mm1" JIS28.8 mm1" ISO30.0 mm1" BMX/OPC32.5 mm1 1/8"/28.6 mm1 1/8" standard, threaded and threadless33.8 mmIS 1 1/8" integrated 45x3641.1 mmCampagnolo "Hiddenset" 45x4541.9 mmZero Stack/ Internal43.9 mm1 1/4"/31.75 mm1 1/4" standard36.8 mm1.5"/ 38.1 mm1.5" standard49.6 mmMotorcyclesTraditional motorcycle head tubes and headsets are sized for a 1 inch diameter fork steerer tube.References^ "Chopper kit installation Guide". http://www.chopper-kit.co.uk/ame-chopper-kit-installation.htm. Retrieved on 2007-04-11. ^ "Stronglight Bicycle Components JD A9 Threaded Headset with Needle Bearings". http://www.stronglight.com/stronglight/page.php?nom=produits&keySousFamille=filetageRoute. Retrieved on 2007-04-11. ^ "Motorcycle Cruiser How to Service Motorcycle Steering-Head Bearings". http://www.motorcyclecruiser.com/tech/service_steering_head_bearings/. Retrieved on 2007-04-11. ^ "Motorcycle Maintenance". http://www.visi.com/~dalebor/maint.htm. Retrieved on 2007-04-11. ^ "Lemond Racing Cycles". 2006. http://www.lemondbikes.com/. Retrieved on 2006-08-08. ^ "Moto Guzzi USA". 2006. http://www.motoguzzi-us.com. Retrieved on 2006-12-11. See alsoBicycle fork Bicycle frame Motorcycle fork Categories: Bicycle parts Motorcycle technology(and so on)


Pedal Assembly
1. Materials: Steel or Plastic 3. Accelerator pedal with Electronic Throttle Control (According to customer's requirement)
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