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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Bullseye Hubsets
BULLSEYE HUBSETBullseye hubs, are made in Burbank, Southern California, are affordably price, while being flexible in the bikes they will fit. Bullseye was one of the first two hub makers to make hubs using precision sealed cartridge bearings. Nearly the entire hubset is made of aluminum. The hub is made of three pieces of aluminum, The flanges are machined as separate pieces and pressed onto an aluminum tube that is the core tube. The three pieces once pressed together make a single rigid hub shell. The front hub uses two Chinese (Mainland China) made sealed bearing cartridges. With one bearing pressed in place, a 16mm O.D. aluminum tube is placed into the hub core tube, then the other bearing is pressed in place. This inner aluminum has a 12mm inner diameter. The 11.96mm outer diameter hollow aluminum axle slides through both bearings and the inner aluminum which reinforces the axle.
The axle is machined from rod, its ends are reduced to the needed 9mm outer diameter for the fork ends. Two locking collars are used to hold the axle in place. These aluminum rings use a single set screw with a 2mm hex fitting to lock the collar onto the axle. The rear hub is similarly constructed using a longer axle, with additional spacers so the hub will accomodate any English threaded freewheel. The ends of both axles have inner threads tapped into them. These threads permit four included bolts to be used to fasten the hubs/wheels to the bike without using wheel skewers. The included bolts with their washers weigh somewhat less than quick release skewers.
We inventory Bullseye hubs in all Black and all Silver, but many other combinations are other available. The hubsets can be custom built. You can specify when ordering any number of color combinations. The flanges are always an anodized color, and can be; Blue, Black, Red, Gold, Lavender, Green, or Silver. The core tube joining the flanges can be any of those anodized colors plus a number of painted colors, including Avocado Green, Yellow, White, Neon Yellow, Pink or pastel Lavender. It takes about two weeks for the hubs to be delivered, so patience is required. Rear axle length can be custom ordered to be 126mm (Road 6 speed use), 130mm (Road 7 or 8 speed use), 135mm (Mountain 7 or 8 speed use), or 140mm (tandem rear wheel use) depending on your use. The available drillings for hole patterns on the hubs are 24, 28, 32, 36, 40, or 48 hole flanges. The hole drillings can be split differently front and rear. The front hub has a 54mm hub flange diameter, with 72mm spaced flanges. The front spoke holes have a 43mm center circle diameter. The rear hub has a 54mm hub flange diameter, with 59mm spaced flanges. The rear spoke holes have a 43mm center circle diameter.
With mounting bolts & washers, the front weighs 198.5 grams, (the bolt set is 27.5 grams), the rear hub in a 135mm length axle, with bolt set, and without freewheel, weighs 249 grams, (the bolt set weighs 27.5 grams). Bullseye includes the needed 3/16" hex wrench to use their bolt set for wheel fastening. Also included is a 2mm hex wrench to adjust the locking collars. Please specify hole pattern. Please be ready with rear axle length, hole pattern, and color scheme when ordering. Rront hub only (Color-BK-S) $ Price in Catalog |
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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... |
