Shimano Wandering Bite Point: Our Bleedkits Gold Mineral Oil Test
Shimano Wandering Bite Point: Our Bleedkits Gold Mineral Oil Test
If you're a Shimano brake user, chances are you've encountered the frustrating "wandering bite point" issue, especially with certain models like the XT M8000. Many riders have shared their experiences, trying everything from bleed techniques to overhauling systems, but one novel solution has gained attention recently: using Bleedkits Gold Mineral Oil.
The Problem: Shimano’s Wandering Bite Point
For years, Shimano riders have complained about an inconsistent bite point, where the brake lever engages at different points during use. This problem has plagued various models, with many attributing it to either a design flaw or incorrect bleeding technique. Despite numerous efforts to fix it, the issue continues to appear in product reviews and user forums, making it a notorious problem for Shimano brake users.
Our Bleedkits Gold Mineral Oil Test
At Gorilla Brakes, we still experienced a wandering bite point on the rear brake after several bleeds with Shimano’s specified fluid. After a bleed using Bleedkits Gold Mineral Oil, the brake felt crisp and consistent for several weeks in our test. This observation does not establish that the oil caused the improvement or that it is approved for every Shimano brake.
What’s interesting here is the theory that this oil’s slightly different properties compared to Shimano's mineral oil help push air bubbles out more effectively, resulting in a cleaner, more thorough bleed. Given how air trapped in Shimano brakes is often the culprit behind inconsistent lever feel, it’s plausible that Bleedkits Gold Mineral Oil improves the process.
Possible Explanations
Fluid characteristics and bleed technique may both affect how a service goes, but this test did not isolate those factors. It does not show that Shimano’s specified oil is less effective at removing air.
One theory offered by users is that this specific oil formula doesn’t hold onto air pockets as much as Shimano’s standard oil does, allowing for a better bleed, particularly with the challenging longer hose runs of rear brakes.
The Debate: Is It Really the Fluid?
Not everyone is convinced. Some argue that the key factor is still in the bleed technique, and while using a different fluid might help in some cases, it may not be a magic bullet for all Shimano brakes. Several experienced mechanics point out that Shimano brakes are tricky to bleed, and even a perfect technique can sometimes lead to inconsistent results. Nevertheless, many agree that Bleedkits Gold Mineral Oil could increase the chances of a successful bleed.
Final Thoughts
For an inconsistent bite point, inspect the complete brake and follow Shimano’s procedure for the exact lever and caliper. Use the specified Shimano fluid, including low viscosity oil where required. Different mineral oils are not automatically interchangeable, and this historical test is not an approval to substitute fluids.
If the bite point remains inconsistent after correct service, stop riding until the fault has been diagnosed and repaired.