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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SRP Stem HardwareSRP TITANIUM STEM EXPANDER BOLTS
SRP makes Titanium stem expander bolts in several lengths, of Titanium Ti 6-4 alloy. Each of these bolts is turned on a lathe to reduce the rod stock to the dimensions required for head and shank of the bolt. The head, which has 12.7mm outer diameter, is drilled for the hex head (allen), then "broached", which is the punching of the 6mm hex shape into the head, then the threads are rolled onto the shank. The expander bolt has 8mm threads with a 1.25mm thread pitch. They come in four lengths, (top of shank to bottom of threads), 70mm, (for Control stems), 90mm (for the Zoom stem), 135mm, and 143mm which most of the remaning stems. Replacements should not be any shorter than the useful length your stem requires. They may be longer, but not shorter. The 70mm bolt weighs 16 grams, the 90mm weighs 19 1/2 grams, the 130mm weighs 27 grams, and the 143mm weighs 29 grams. 8mm x 1.25mm x 70mm $ Price in Catalog SRP TI RITCHEY FC ROAD EXPANDER BOLT
The expander bolt for the Ritchey Force Comp Road stem, made by Nitto doesn't follwo conventionality in theading, by using a 8mm diameter shank, nor does it adopt the 7mm shank used in the Ritchey Taiwan stems. Instead it uses a 6mm x 1mm pitched thread on a bolt that is 129mm long. The SRP exact replacement weighs 14 grams. 6mm x 1mm x 129mm $ Price in Catalog SRP TITANIUM CINELLI 1A / XA EXPANDER BOLT
The 1A and XA expander bolt is rather unique. It is 135mm long with 7mm x 1mm thread pitch. The head is 12mm in diameter, with a 9.5mm height to recess flush into the stem. This SRP bolt is an exact replica of Ti 6Al-4V and has a weight of 25 grams. 7mm x 1mm x 135mm $ Price in Catalog SRP TITANIUM CINELLI XA BINDER BOLT
SRP recognized that some XA owners may want to change their steel binder bolt to Titanium, this is that bolt. The rod is turned to the proper dimensions for head and shank. The head is drilled and broached, making a 6mm hex head, then the threads are rolled onto it. The outer diameter of the head is 12.8mm. The bolt has 8mm threads by 1.25mm thread pitch. The bolt is 20mm long and weighs 7 grams, nearly half the weight of the steel original. 8mm x 1.25mm x 20mm $ Price in Catalog SRP TITANIUM BINDER BOLTS
In many instances people want to replace their steel binder bolts with Titanium ones, these bolts make that possible. They are made like the other SRP bolts, machined, with rolled threads of lightweight Ti 6-4 Titanium alloy. These bolts have a 5mm hex head with 6mm threads by 1mm thread pitch. The outer diameter of the head is 9.6mm. They come in three lengths, 20mm, 33mm, and 45mm. The 20mm length weighs 3 grams, the 33mm bolt weighs just under 5 grams, while the 45mm bolt weighs 6 grams. These also fit other parts like brakes and seatposts. 6mm x 1mm x 15mm $ Price in Catalog SRP TITANIUM IRD OR SYNCROS STEM BINDER BOLTS
These are really the long version of SRP Titanium water bottle cage bolts, but they fit perfectly as replacement binder bolts for the IRD Macaroni and Ricky Racer stems. They are made of Ti 6-4 Titanium rod, which is turned to the proper dimension for the head and shank, the head is drilled then broached with a 4mm hex head. The threads on these are rolled. The outer diameter of the head is 8.3mm. The bolt has 5mm threads by .8mm thread pitch and is 18mm long. Each bolt weighs 2 grams. Sold in pairs. 5mm x .8mm x 18mm - pair $ Price in Catalog SRP CONTROL TECH TITANIUM QUILL STEM UPGRADE KIT
This kit contains Titanium 6Al-4V replacements for the two steel bolts used in the Control Mountain and Road stems. The expander bolt, is 70mm long, with 8mm threads by a 1.25mm thread pitch. The expander bolt has a 6mm allen head and weighs 16.5 grams. The binder bolt, has a 5mm hex head, with 6mm by 1mm thread pitch, is 15mm long, and weighs 3 grams. The threads on both bolts are cold rolled onto the machined shank. $ Price in Catalog CONTROL TECH TITANIUM AHEAD STEM UPGRADE KIT
This kit contains Titanium 6Al-4V replacements for the three steel binder/clamp bolts and an aluminum replacement for steel cap/SFN bolt used on the Control Ahead stems. The binder (1) /clamp (2) bolts, have a 5mm hex head, with 6mm by 1mm thread pitch, are 15mm long, and weighs 3 grams each. The cap/SFN bolt is machined from aluminum rod with 6mm x 1mm with a 30mm length. It ha a 5mm hex head and weighs a slim 3 grams, (aluminum, ever-light). The threads on all three bolts are cold rolled onto the machined shank. |
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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... |
