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Shimano SPD Cleats


SHIMANO 50 SERIES SPD CLEAT SETS

Shimano makes both types of cleats available in replacement sets. The Black SM-SH50 for one way lateral release and the SM-SH55 Silver set for multiple release mode work on their pedals, (described in detail in the SPD overview).

SM-SH50 Black $ Price in Catalog
SM-SH55 Silver $ Price in Catalog

WINWOOD SPD REPLACEMENT CLEAT SET

These replacement cleats are functionally identical and appear to be physically identical to the Shimano single release SM-SH50 cleat set. However these are made of stainless steel and are made in the United States. The Japanese made Shimano cleats are much more expensive because of the high exchange rate of the Yen (´) to the US dollar ($) also known as Endaka. Their US manufacture allows them to be sold for just a little less than the Japanese equivalent (Winwood has instructed in what price to sell these for). They come as a pair of Silver cleats with the two 5 x .8mm silver installation bolts. The weight of the cleats is 36 grams and the bolts weigh 8 1/2 grams. $ Price in Catalog

SHIMANO SM-PD20 M737/M525 PEDAL PLATFORM/REFLECTOR

It's possible, under some circumstances, when using M737 or M525 pedals on your bike that you will not want to use shoes with cleats. Possibly you will be commuting to work in street shoes, but need to race with cleats on the weekend. For this purpose Shimano makes these platform inserts. They have a cleat shape that snaps into the cleat retention system. Made of durable Black plastic, the upper surface of these inserts is largely flat with raised teeth to grip and hold the shoe bottom. Draped off the front and the back is an Amber reflector to aid in being seen. Gripping and twisting the platform/reflector releases it from the pedal. The pair weighs 86 1/2 grams.
$ Price in Catalog

SHIMANO 70 SERIES SPD CLEAT SETS

Shimano makes both of the 70 series cleat types available in replacement sets. Both are Black; the SM-SH70 is fixed-position, and the SM-SH71 which permits 6 degree rotational movement.

SM-SH70 Fixed $ Price in Catalog
SM-SH71 Rotational $ 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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