SRAM have recently updated some versions of their Guide brakes to use a new revised S4 caliper…

This new caliper has done away with the traditional threaded bleed port found on the other versions of the SRAM caliper. The new version, which requires the special ‘SRAM Bleeding Edge Technology Tool‘ in order to bleed it, involves a new and improved bleed port without the need to thread in via a traditional type of bleed adaptor, as the new Bleeding Edge Tool adaptor simply clicks into place. it has been designed to make the bleed procedure a little easier and with less chance of fluid leaking out during the bleed process. We now have S4 bleed adapters available to purchase.

So what’s this new bleed port and adaptor look like and how do you check which caliper you have…

Check out the images below to see what you are looking for and for the differences in bleed ports as well as bleed adaptors from both SRAM and ourselves.

If you have purchased your SRAM Guide brake(s) new, then you may have this tool in the box.

So, what bleed kit/adaptor do you need for your brakes…

1) Currently, if have the S4 caliper and you do need the Bleeding Edge Tool which is available as an option on our SRAM Bleed Kit.

Check out our SRAM Bleed Kit with Bleeding Edge Tool.

2) If you are looking for an SRAM bleed kit without the tool (because you don’t need it, or already have it), then you can sve yourself a few quid and order our SRAM Bleed Kit without the extra adapter:

Big Ride Racing SRAM Bleed Kit.