Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Cleaning Ultegra hydraulic disc brakes...probably wrong forum.

Road Cycling ďIt is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.Ē -- Ernest Hemingway

Cleaning Ultegra hydraulic disc brakes...probably wrong forum.

Old 05-25-20, 08:18 PM
Junior Member
Thread Starter
Join Date: Feb 2017
Posts: 199
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Liked 18 Times in 13 Posts
Cleaning Ultegra hydraulic disc brakes...probably wrong forum.

I apologize if this is in the wrong location. I have a Giant tcr with Ultegra 8000 hydraulic disc brakes. The front brake is dragging a little, itís a little slow to release when I let off the lever. It appears that the piston that pushes the brake pads together doesnít reset all the way. Can I squirt the entire bare caliber and pad with brake cleaner to see if it releases? Or what is the best fix?
Lrdchaos is offline  
Old 05-25-20, 08:46 PM
Senior Member
Join Date: Jan 2014
Location: Utah
Posts: 754

Bikes: '88 Trek 1200, '91 Trek 1400

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 119 Post(s)
Liked 7 Times in 5 Posts
I've never actually cleaned my pistons, but something that I've done when this happens is pull out my pads and reset the pistons with a plastic tire lever. Push them both in all of the way, then put the pads back in and realign your caliper (if it needs it).

This has also been a sign for me that my pads are getting worn and the pistons are sitting out too far.
Shinkers is offline  
Old 05-26-20, 08:24 AM
Senior Member
NoWhammies's Avatar
Join Date: Jul 2017
Location: Pacific Northwest
Posts: 1,895

Bikes: Argon 18 Gallium, BH G7, Rocky Mountain Instinct C70

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 771 Post(s)
Liked 484 Times in 282 Posts
I agree with Shinkers I do pretty much the same thing. Sometimes what I'll do, before pushing the pistons back in, is spray them down with rubbing alcohol. I will then thread a shop towel through the housing to clean out the break dust. After a couple of minutes letting the alcohol evaporate, I'll push the calibers back in with the plastic tyre lever.
NoWhammies is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.