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PostPosted: Fri Jun 10, 2016 4:20 pm 
Gold Trader
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Joined: Sat Oct 23, 2010 10:33 pm
Posts: 2359
Location: New Forest
Magura royal blood has a boiling temp of 120... Just saying :)

But I'll say, although Trials riders use water, they also have masses of calipers fail after a year or 2, and they are not working at high speed!

Just use LHM.


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PostPosted: Fri Jun 10, 2016 4:24 pm 
Dirt Disciple

Joined: Fri Apr 25, 2014 11:22 am
Posts: 42
Location: Birmingham
old_coyote_pedaller wrote:
VaNDAL_UK wrote:
From what I've read it should be fine. It lubricates and prevents swelling. Thinking I may do a distilled water and PG mix and run it for a year.

60/40 water/PG


The above might seem OK until you factor in this,

Thias wrote:
And LHM was tested with brakes. Hot brakes. ;)
Why bother? Use LHM and thats it. I have used it for years and I am haveing no issues. At all. In the first years of Magura hydrostops they even recomended the use of LHM in their manual.


All brake fluids, whatever they are, are designed to cope with high temperatures and not to boil at those temperatures causing gases which result in brake failure.

You are proposing to use water as a brake fluid :shock: , which boils at 100C, way, way below what proper brake fluids do.
It's your choice of course but try touching your brakes after a downhill where you are braking hard, frequently. They'll be feckin hot.
Do you really want to risk the water turning to steam just when you need your brakes the most?


Rim brakes? 100c+ temps? really? REALLY???

rIm BrAkEs!


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 Post subject: Re:
PostPosted: Fri Jun 10, 2016 5:13 pm 
MacRetro rider
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Joined: Thu Jul 30, 2009 4:56 pm
Posts: 2849
Location: A Fifer furth o' the Kingdom
OK, you've got me there for not properly reading all the posts. The thread was about alternatives to Magura oil, not the brakes themselves.

But my post still stands just in case anyone should read this thread and fill their Magura DISC brakes with water/anti=freeze mix thinking it will be OK because "I read that it worked on some guy's Maguras", not knowing it was rim-brakes it was used in. Even I might give it a go being the cheapskate I am if I had Magura rim-brakes. A guy once told me, years ago, he put cooking oil in his Mini's brakes while on holiday in France because he was stuck after fixing a brake problem and had no brake fluid to hand.

Never used Magura rim-brakes, still have a set of Louise disc brakes somewhere, but did touch my front rim once after a downhill section back when I had V-brakes, was surprised how hot the rim was. Not 100C I grant you but it could explain the punctures I've seen with guys descending on the TDF at up to 60mph using rim-brakes.


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PostPosted: Mon Jun 18, 2018 4:59 pm 
Old School Hero

Joined: Thu Nov 19, 2015 1:44 pm
Posts: 189
Location: Beds
I have use water in all of my HS33 Magura for competitive XC racing, professional trials and everyday use since 2004.

Never had brake fade!
Never had a brake fail!
Faster responding and super reactive.

We also converted 1000s and 1000s of my customers to using water with no issues what so ever.

Mineral oil I would always recommend Magura Royal Blood


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PostPosted: Tue Jun 19, 2018 3:06 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 9177
Location: New Forest, UK
You never get that kind of fade with rim brakes as there is so much more mass of rim to heat and the large rubbery brake blocks stop heat flow into the hydraulic slave cylinder.


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