Mountain Bike Brake Fluid Change

This tutorial shows an easy and cheap way to replace the fluid in hydraulic bicycle brakes without the need for expensive bleeding kits. Mountain bike rider 119 849 views. Mineral oil won t harm painted finishes and is less damaging to your skin and the environment.

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Chemically speaking dot fluid absorbs humidity from the air and this absorbed moisture lowers dot fluid s boiling point over time.

Mountain bike brake fluid change. Stopping bike disc brake squeal here s a good diy technique you probably haven t tried yet. The main reason for replacing the fluid is not because brake performance may have become worse but to prevent corrosion of brake components due to water in the fluid. Although shimano made dot fluid brakes in the 1960 s and 70 s our modern brakes use mineral oil. We would like to show you a description here but the site won t allow us.

Its just a piece of preventative maintenence. How to bleed shimano mountain bike disc brakes duration. Dot fluid absorbs water and drops its boiling point all brake fluid slowly collects contaminants dust that gets past the seals and wear particles. Shimano mph 3 brakes are used for this demonstartion.

This problem is more severe with dot type fluid but can occur with either especially if the bike is used stored in wet conditions.