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In the cycling world, hydraulic disc brakes have become the norm, while cable-operated braking systems are becoming increasingly rare. This has significantly increased the demand for hydraulic brake lines and connections in workshops. For the correct operation of these systems, specific connection parts are crucial, emphasizing the need to always use original or perfectly fitting aftermarket parts.
Despite the fact that most brake lines have an outer diameter of 5.0 mm or 5.5 mm, the inner diameter varies between 2.0 and 2.5 mm. These variations make it necessary to choose the correct olive and insert for a good seal. Due to supply problems in the bicycle industry, specifications were often changed during production. This resulted in brand A brake systems paired with brake lines from suppliers B, C or D. If the specification of the brake line is unknown, it must be measured to find the correct connection parts.
To prevent leaks when connecting hydraulic systems, a new original compression fitting set should be installed after disconnecting the line. This set usually consists of an olive-shaped bushing (olive) placed over the pipe and a pin (insert) pressed into the pipe. The fit of these parts is critical; any slack can already lead to leaks. The olive can accommodate some tolerance differences through deformation, but the insert must be just the right size to avoid problems. Therefore, it is critical that the compression fitting fit exactly on the pipe.
Measuring the outside diameter of a brake line is easy with a caliper. Measuring the inside diameter is more complicated due to the small size and flexibility of the pipe. For this, a gauge is used, in the form of a fitting pin, which must fit into the pipe without play to measure the correct diameter. With these measured values, one can then choose the correct olive and insert.
To simplify this process, Elvedes has developed a universal kit. This kit includes a measuring jig for the inside diameter of the brake line and two bores in the handle for determining the outside diameter (5.0 and 5.5 mm). In addition, the kit includes a roadmap for measuring and selecting the correct parts, conveniently printed on the inside of the lid of the workshop box, which stores the caliber and universal inserts.
With the Elvedes brake hose measurement tool you can filter three combinations after measuring the line. Elvedes has designed a compression fitting for each of these combinations. These universal compression fittings consist of a single piece, a combination of the olive and insert, which can be placed directly on the pipe. This design simplifies installation and reduces the risk of errors. Before installing a new knot fitting, make sure the brake line is cut cleanly straight with brake line pliers and rounded on the inside and outside.
Precision is essential when connecting hydraulic brake lines to prevent leaks. By using original or perfectly fitting aftermarket compression fittings and taking accurate measurements with tools such as the Elvedes brake hose measurement tool, bicycle mechanics can ensure that their clients' brake systems function optimally. Elvedes' innovation offers a practical solution for measuring and choosing the right parts, making the work in the workshop more efficient and reliable.