![]() ![]() The caliper on the right can be bled using the regular threaded bleed fittings found in your Avid Bleed Kit, whereas the one on the left requires the Bleeding Edge tool. The one on the left is the S4 caliper with the updated bleed port, and on the right you can see the older design with the bleed port in its more traditional setting. Features: Includes: Two 20 mL syringes Two hose assemblies with shutoff clips Two 10 mm/12 mm universal bleed blocks Two 11 mm bleed blocks for Hayes® systems Two adjustable syringe holders M5 x 0.8 adapters SRAM® (x2) M6 x 1. Left: SRAM Guide S4 caliper with Bleeding Edge bleed port Right: Previous caliper design with traditional bleed port. Below you can see two SRAM Guide brake callipers with the location of the bleed ports marked by arrows. In order to answer that we need to find out if you have the new SRAM S4 caliper or an older model. There is now no need to remove the caliper bleed port screw in order to attach the bleed fitting since the Bleeding Edge tool is also used to open and close the system making the bleed process faster and cleaner. Here you can see just how much the SRAM Bleeding Edge tool differs from the traditional bleed adapters (circled) which you would normally use to bleed older SRAM and Avid brakes. The new SRAM Bleeding Edge tool with traditional Avid/SRAM bleed adapter circled. Sounds harmful enough but it does mean you will now need new kit in order to perform a full bleed of any brake system equipped with the Bleeding Edge interface - inconvenient to say the least! So what does the new adapter look like? A dedicated bleed adapter plugs into the bleed port and seals the system to minimise air contamination and fluid loss." An updated fluid path and bleed porting make it easier to push fluid through the caliper. "Bleeding Edge™ technology makes bleeding brakes quick and simple. Here's what SRAM themselves have to say about it: Specifically it means a change to the bleeding port on the new SRAM S4 brake caliper meaning that your good old threaded bleed fittings from your SRAM Bleed Kit will no longer fit. Avid / Sram Bleeding Edge Adapter Tool For use with Avid Pro Bleed Kits (Bleed Kit Sold Separately In Our Store) Designed for bleeding the Guide. For mineral oil brake systems use the Park Tool BKM-1.2 Hydraulic Brake Bleed Kit - Mineral Oil.SRAM's Bleeding Edge technology is a change in standard which seems to be spreading to all SRAM's brake models from 2017-onwards including Guide, Code and Level brakes - it even features on the new Reverb 1x remote! Cross-contamination of brake fluid may cause seal failure which may result in brake failure. DOT fluid and mineral oil should never be mixed in the brake system or in their respective service tools. NOTE: The BKD-1.2 is for DOT fluid-based hydraulic bicycle brake systems only. Two 11 mm bleed blocks for Hayes® systems Two 20 mL syringes Two hose assemblies with shutoff clips Every part is replaceable and available from Park Tool. The BKD-1.2 is built for the rigors of daily commercial use and includes two syringes, hoses with shutoff clips, multi-size bleed blocks, and a set of our unique mountable syringe holders, as well as multiple hose fittings to fit the multiple standards found on hydraulic bicycle brake systems. Bleeding of hydraulic brakes removes air bubbles and contaminants from the braking system, for long-lasting components and peak performance. The BKD-1.2 Hydraulic Brake Bleed Kit will bleed most models of DOT fluid-based hydraulic disc brakes, including models made by SRAM®, Formula®, Hayes®, and Hope®.
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