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Profile Drop Handlebar


PROFILE HAMMER DROP BAR

The Hammer is Profile's only Drop style bar. It's made of 6061-T4 aluminum alloy tubing. The tubing has a 23.7mm outer diameter, and a 1.7mm wall thickness at the ends. Between the tubing ends, the wall thickness may vary based on bend and bulges. A groove is pressed into the front face of the top section of the bar. This is the trough for recessing under the handlebar wrap the brake and shifter cables when an aero styled brake/shift lever is used. The Hammer is made in two drops. The smaller, shallow drop version measures 139mm center to center, the larger "steep" drop measures 175mm from the center of the top to the center of the lower drop. Each Hammer drop bar comes with two halves of 1" diameter aluminum tubing. These sections are 64mm long and made to be inserted at the back side of the tight radius inside the lower drop. When these pieces are covered they smooth the tight area and make a broader area for palm support. The Hammer bar is anodized a Gun Metal Blue color, and comes in two widths in each of the drops, 40 cm, 42cm, in the shallow model and 42 cm or 44 cm in the steep drop model. The center most 3 1/2" is bulged, leaving the needed 26.0mm standard outer diameter for Road stem other than the Cinelli with the 26.4mm I.D. The 42 cm Hammer shallow drop bar weighs 307.5 grams, the included bare aluminum tubing sections add an additional 20.5 grams (328 grams total). The 42 cm steep drop version of the Hammer weighs 375 grams, the included Black vinyl covered tubing sections add an additional 37 grams (412.5 grams total).

Width-0-2 Shallow Drop $ Price in Catalog
Width-2-4 Deep Drop $ Price in Catalog





In-depth Information About Metals

Aluminum
Aluminum is extracted electrolytically from bauxite ore. It is made by the electrolysis of aluminum oxide which is found in larger concentrations within bauxite ore. Bauxite is a mixture of the hydroxides of aluminum, together with other impurities such as oxides of iron, titanium, and silicon. Bauxite is produced by the weathering and change of aluminum silicate rocks usually found in tropical and semitropical regions where climate has produced an accelerated weathering process. Bauxite is not a rare ore and is widely available in the US, the Caribbean, and Europe. Approximately 4 pounds of read the full article...

Beryllium
Beryllium is a specialty metal that is steel-grey metal in color, with an extremely low density, making it very light weight. At 1.85 grams to the cubic centimeter, its density compares to that of magnesium. It is also a high strength metal, making it possible to design light weight, thin membered parts with ahigh stiffness. A column made of beryllium to support a load placed directly downward on top of it, will have a greater load carrying capacity, and be lower in weight than any other metal of equal size.

Until the 1950's beryllium was used read the full article...

Titanium
The element titanium was discovered in 1763 by an English cleric, William Gregor who was an amateur chemist with an inquiring mind. It was in the black sands of Cornwall that he discovered the new element that had up to that time, attracted little scientific interest. A few years later, an Austrian, Klaproth, extracted the same element from an ore widely known as "rutile", which is a mineral consisting of titanium dioxide (one titanium atom, two oxygen atoms), that is a reddish-brown substance with a slight metallic luster. While rutile is the highest grade read the full article...

Metallurgic Hardness Testing
There are three types of tests used with accuracy by the metals industry,they are the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. Hardness is the property of a metal which gives it the ability to resist being permanently deformed (bent, broken, or have its shape changed), when a load is applied. The greater the hardness of the metal, the greater resistance it has to deformation. Since the definitions of metallurgic ultimate strength and hardness are rather similar, it can generally be assumed read the full article...


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