For your easy reference, a summarised guide follows below.After half the oil in the bleed cup has drained out, close it. Connect a bleed hose to the bleed syringe and fill with mineral oil. It’s much less harmful to skin and can be stored longer without soaking up water from the atmosphere.
Stop before air enters the caliper then close the valve/nipple.Sign up to receive our newsletter!Unlike the incompressible fluid in your brake lines, the unwanted air bubbles are a compressible gas and will cause excessive movement at the lever and dramatically reduce braking performance.Close the valve/nipple and remove the bleed hose. Return the lever to horizontal.Jack has been riding and fettling bikes for his whole life.
Bleeding the brakes on your bike removes any air bubbles from the brake lines, keeping your brakes feeling firm and working well. Don’t overtighten this as it’s very easy to strip the threads on the cup.Thanks!
Some telltale signs that the brakes on your bike need to be bled are that they feel squishy, or that you have to pull the lever almost all the way to the handlebars before they work.
You've been subscribed to our newsletter.For all brakes, turn the spanner/Allen key anticlockwise a quarter turn. Gather your tools & remove the wheel.
Invert the syringe it and squeeze out any air bubbles.If the hydraulic disc brakes on your bike are feeling spongy at the lever, then it’s normally a sign that the system has taken in some air.Bleed your Shimano stoppers the easy wayAlready have an account with us?
DOT fluid can be more resistant to heat, though.Get the next 3 issues of the UK's number one cycling magazine for just £5Remove the syringe from the end of the hose.Install the bleed cup’s plastic plug and remove the cup. How to Bleed Shimano Disc Brakes Remove the rear wheel. Flick and release the brake lever a few times. With a near encyclopaedic knowledge of cycling tech — from the most esoteric niche nonsense to the most cutting edge modern kit — Jack takes pride in his ability to seek out tech and stories that would otherwise go unreported.
So, grab your Shimano bleed kit, and follow along to have your brakes feeling like new. Shimano has made bleeding their disc brakes quite easy with the right tools and parts. Use the syringe to force oil … Pump the brake lever a few times, open the valve/nipple, squeeze the lever to the bar, close it, release the lever. Sign in to manage your newsletter preferencesUse a 4mm Allen key to loosen the brake lever bar clamp. Repeat four times.Use a 2.5mm Allen key to remove the bleed port screw on the top of the lever’s reservoir then use a pick to remove the small o-ring.
This will sometimes come out with the cap.Bleeding the hydraulic disc brakes on your bike may not necessarily need to be part of your routine maintenance, but it’s a fairly simple procedure and one that you shouldn’t be intimidated by.Put the hose, pointing down, into a bag.
Use the syringe to force oil through the system. Always in search of the hippest new niche in cycling, Jack is a self-confessed gravel dork, fixie-botherer, tandem-evangelist, hill-climbing try hard, and thinks nothing of taking on a daft challenge for the BikeRadar YouTube channel.
Repeat with the brake lever tilted forwards and then back by 30 degrees.
For all brakes, turn the spanner/Allen key anticlockwise a quarter turn.
Depending on how often and how far you ride, you will need to bleed your Shimano hydraulic disc brakes about every six months.
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how to bleed shimano brakes