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Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have. |
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Archival Reviews of Tioga Pedals
TIOGA SUREFOOT IV ATB PEDALSTioga Surefoot IV pedals are a toe clip style pedal, made in Taiwan, with an aggressive competition shape. The unusual feature of these pedals is the Zerk fitting into the spindle area of the pedal body. Using the grease injectors that have become popular, (Finish Line, Pedros, Fat City) it is possible to inject and replace the grease in the Surefoot's bearing assembly. The Zerk fitting uses a small spring loaded ball bearing to seal the injection mechanism. The pedal body is a single piece of forged aluminum. The interior is tapped with threads for the single unit spindle and bearing assembly to thread into. The spindle hole in the body is tapped for a machined aluminum locknut to thread into. The locknut has an O-ring that seals the locknut to body contact.
On the spindle, at the end of the locknut, is a steel bearing tube that has bearing cups at each end for the thirteen 1/11th inch (.0935) loose ball bearings used at each end. There is a hole through the center of the bearing tube which is positioned beneath the Zerk fitting hole, which allows the grease to migrate among the ball bearings. At the end of the spindle is a steel cone race, and there is one polished surface on the spindle which becomes the cone race for the inner bearing set. When the injected grease exceeds the volume of the spindle/bearing cavity it migrates between the bearing tube and the spindle, back out toward the crank arm were it emerges from under an O-ring that closes the area between the spindle and the aluminum locknut. The Black cage is made of die-cut aluminum plate and has four recessed holes for the screws that fasten the cage to the braces on the body. The cage on the Surefoot IV has a tall back with four toe-flip tabs. The cage has a slot at the end toe strap passage, and tapped holes for toe clip mounting bolts to fit directly to the cage. A pair of the Surefoot IV pedals weighs 319 grams. The body is Silver, the cage is Black. These were replaced by Tioga with the Tioga Clitman pedals a clipless design made in Taiwan to replicate the Shimano 747 which Tioga is also responsible for importing to the United States. The pedals sold for $24.99 a pair |
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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... |
