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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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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Bottom Brackets Brake Systems
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IRD Cantilever BrakeGenerally speaking, IRD goods aren't available any longer. Their belief in not using distributors left them under-represented in the marketplace as more capable, up-starts became more business saavy in the industry.
IRD SWITCHBACK BRAKE
This is a cleanly machined cantilever brake made largely of aluminum with a few steel pieces. It's a powerful brake with a soft feel, excellent for front or rear use. The Switchback uses a unique cable routing to pull the arms together, which eases strain on the mounting studs and eliminates the need for a "booster plate" because the power is already boosted by the concentric wheel design. This brake uses an extra long straddle wire that is wrapped around an aluminum wheel at the cantilever arm end. The wheel is fastened off center so the rotation of the wheel when pulled, is concentric. The Micro Swicthback has several holes drilled through it to reduce weight. Because of this powerful cam principle, a small, tiny, little brake lever pull becomes huge rim clamping power. Stainless steel mounting bolts are included with the brake. Each brake comes with Kool Stop Eagle Claw pads. The weight of the brake with its straddle wire weighs 151 grams to which we add 47.5 grams for the brake pads to give a total on the bike weight of 198.5 grams. Black, Lavender or Silver with Silver accents. Color - BK-L-S $ Price in Catalog IRD WIDGET SUSPENSION CANTILEVER
This uniquely designed brake solves problems in cable routing that many rear or front suspension systems have difficulties with. The brake cable housing runs straight from the lever to one arm of the cantilever. A cam and pivot mechanism on the arm the cable is fastened to combined with a solid rod linkage joining the other brake arm open and close both arms simultaneously with lever activation. Put another way, this brake with its mechanical linkage eliminates the effect of the rear suspension travel on the brake wire's tension. The Widget is made only in Silver and comes with Kool Stop Eagle Claw pad and stainless steel mounting bolts. The Widget with brake pads, mounting bolts and hardware weighs 196.5 grams. Again these aren't made any longer. |
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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... |
