Product Overviews  |   Archive Reviews  |   Comparison Tables  |   Tables  |   Metals Guide  |   Frank's Picks  |   News & Gossip
Additional Knowledgable Resources


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.



Bottom Brackets
Brake Systems Chains
Computers
Cranks and Chainrings
Forks
Frames & Framesets
Freewheels and Cassettes
Front Derailleurs
Grips
Handlebars
Handlebar Extensions
Headsets
Helmets
Hubs and Skewers




Lubricants
Metal Guide - Bicycle Metallurgy
Mirrors
Pedals and Toe Clips
Pumps and Inflation Systems
Racks
Rear Derailleurs
Rims & Rimstrips
Saddles
Seatposts and Binder Bolts
SRP Replacement Titanium &
Aluminum parts - Master Index

Stems
Tires
Tubes
Shoes
Spokes (Tables Only)
Tools - Bicycle Repair Tools
Yakima Fit List -to fit all cars

Notes
Home

Grafton Brake Levers


image

GRAFTON RE-ENTRY BRAKE LEVERS

The Re-entry levers are complexly machined, light and pricey. Machined from 7075-T6 billet aluminum the handle piece uses a traditional pivot design. The clamp assembly is machined as a single piece from billet aluminum, with the binding mechanism drilled and milled away so the last saw cut opens the clamp. The lever fastening bolt is made of stainless steel. Like a water bottle cage bolt, it has 5mm by .8mm threads with a 9.5mm length, a 3mm hex fitting for tightening and a 2 gram weight. The cable adjuster and its fixing nut are made of aluminum with 7mm by 1mm threads and slot cut up the middle so the adjuster can revolve around the cable. The adjuster weighs 2 grams and the nut weighs 1.5 grams. The handle is held to the clamp assembly by pivot pin. The pin in the instructions is said to be made of Titanium but we found it was really machined stainless steel. Mounted on both sides of the handle in the pivot pin area is a machined brass bushing with four holes. These holes along with holes through the clamp housing allow four separate pivot point possibilities. The pivot pin can be positioned in any of the four to affect the type of pull (braking style) the rider wants. A more immediate cable pull, or a steady but increasing pressure can be achieved through different positions. The stainless steel pin is held in place by a constricting style cir-clip or "E-clip". Changes in the pivot can't be done on the fly, it requires a couple of minutes, and a small screwdriver. Nylon washers on the outside of the clamp housing, and the brass interior, help to reduce friction between the handle and housing as the handle pivots.

Each lever has a steel reach adjustment set screw near the cable exit point. Tightening it shortens the distance the lever can travel when released making it more comfortable for small hands. Unlike mass produced lever sets, the Re-entry Levers don't have return springs built in and must rely on the springs in the brake arms to close the lever when released. The lever is 85mm long from the center of the pivot to the tip of the handle. The area for finger grip is 85mm long. A Black rubber grip covers the outer 2 inches of the handle. Re-Entry levers are available anodized in Blue, Black, Pewter Grey, Lavender, Red or Silver. They have a pair weight with the steel bolts and rubber grips of just 116.5 grams. These come with a short or long handle design. Made in USA.

Color-B-BK-GY-L-R-S $ 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...


Copyrighted material - All rights reserved

This site sponsored by
Crinella Winery Sauvignon Blanc and Pinot Noir