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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Rim Strips
Inner tubes when inflated at modest to high pressure, will sometimes expand and balloon into the larger spoke hole in the rims cross-tie wall. If the drilling of the spoke holes has left a burr around the spoke hole, or if spoke itself is a little long after wheel truing there is the likelihood that these conditions will puncture the underside of the inner tube. Shortening an installed spoke is difficult, de-burring each hole maybe time consuming, so the industry has adopted the use of rimstrips. Rimstrips are made of flat cloth, fabric or rubber, joined at the ends to make a circular strip that fits tightly around the rim closing off the spoke holes. RUBBER RIM STRIPS
We sell the traditional rubber strips, made of a long thin rubber strip with a vulcanized seam joining the two ends. A Schrader valve diameter hole occurs in the area of the overlapping seam, reinforcing the hole with two layers of rubber. We sell them in two sizes, a 26" diameter, that covers the spoke hole area on any 26" rim, and a 700c/27" size that covers over the holes on a narrower road racing wheel. 26" rubber rimstrip - each - 24 grams $ Price in Catalog SPECIALIZED PLASTIC RIM STRIPS
Specialized has made for them in Japan, Red plastic rimstrips. The 26" diameter size are 19.8mm wide and should on all 26" mountain rims. The 700c/27" diameter size are 10.5mm wide and should on all 700c/27" road rims. The plastic is un-yielding, with very little stretch. They have a hole for a Presta valve where the two plastic ends overlap and are joined. They will last the life of many wheel sets. 26" diameter - pair - 39 grams $ Price in Catalog VELOX FOND de JANTEƒ RIM TAPE
The French maker of rimstrips, Velox has three models of cloth. The are made of White woven cotton fabric, so the sides of the strip won't unravel. The rim tape comes spooled on a plastic core, wound onto itself and adheres to the rim because of its self adhesive back. A hole to fit a Presta valve occurs about three inches from the beginning of the tape. Each roll of Velox will cover the spoke holes of one wheel up to 28" in diameter, you merely cut the tape to length after a small area of overlap. Each of the three models is use on different width rims, the #56 is 10mm or about 3/8" wide for use on narrow rims, the #51 is 17mm or about 5/8" wide, and the #220 is 22mm or about 7/8" wide for use on ATB rims. JantŽ tape is sold by the roll, with the specific weights of each roll listed below. #56-10mm or 3/8" - each -10 grams $ Price in Catalog SCHRADER TO PRESTA GROMMET ADAPTER
As we mentioned in the overview, many rims come with Presta valve holes which are easily reamed out to the Schrader diameter, but what if you have a Schrader valve hole in your rim and want to use a Presta valved tube? This rubber grommet is pushed into the Schrader hole and has a lip on both sides to grip the top and bottom of the rim extrusion, narrowing the hole to the Presta diameter, giving the Presta valve support so the valve doesn't tear away form the inner tube. Made of Black rubber they weigh less than 1/2 a gram. Schrader Grommet- each $ 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... |
