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https://www.radicperformance.com/brake-fluid-tech Bionol and Gold Hydraulic oil boil over 400 celsius, although it seems that one of the best performing mineral fluids is the plutoline, which has a way lower boil point, so i'm not sure how this influences performances on mtb brakes
Because their claimed performance is such an outlier, I’m slightly skeptical of the Bionol and Gold fluid claims. I haven’t been able to find any real information on them other than marketing material.
I’d love to see an actual Technical Data Sheet for them.
Past a certain point it doesn’t matter though. The ETFE liner in your brake hose will melt at 260-280C anyway.
https://www.mrc-trading.de/media/db/63/36/1715758579/VAR-D-BHO-0.pdf (in german of course, since you could't be bothered to use si units earlier instead of your imperial units)
there you go, the one for bionol
That's a safety data sheet which is far from a technical specification...
I think it does have the relevant info though.
If I’m correctly looking at that, “Siedebeginn” is “start of boiling” which is 360c And they test per astm d2887.
I don’t know why they say there’s a 60c range on it though.
I have faith in Radic and tirckstuff that those fluids work well in their products and have been tested for it, but my experience with bio-based oils replacing mineral oil in suspension products (seal swelling etc) would make me wary of putting it in mainstream brands not designed for it
because its the range in which boiling occurs:
SECTION 9: Physical and Chemical Properties
9.1. Information on Basic Physical and Chemical Properties
• Physical State: Liquid
• Color: Not specified
• Odor: Characteristic
Testing Standards
• pH Value: Not determined
Changes of State
• Melting Point: Not determined
• Initial Boiling Point / Boiling Range / Temperature at 50% Mass Loss:
• Approx. 360°C / 360°C-460°C / 420°C
• ASTM D2887 / DIN 51435
• Flash Point: >190°C (ASTM D92)
Flammability
• Solid: Not applicable
• Gas: Not applicable
• Lower Explosive Limit: Not determined
• Upper Explosive Limit: Not determined
Self-Ignition Temperature
• Solid: Not applicable
• Gas: Not applicable
• Decomposition Temperature: Not determined
Oxidizing Properties: Non-oxidizing
• Vapor Pressure: Not determined
• Density (at 20°C): 0.88 g/cm³
• Water Solubility: Insoluble
• Solubility in Other Solvents: Not determined
• Partition Coefficient: Not determined
Kinematic Viscosity (at 40°C / 100°C):
• Approx. 8.56 mm²/s / Approx. 2.80 mm²/s
• ASTM D7279 / ASTM D2270
• Vapor Density: Not determined
• Evaporation Loss (NOACK, 250°C, 1 hour): 15.6%
• ASTM D5800 / DIN 51581
Other Information
• Solid Content: Not determined
• Viscosity Index: 200
petrus hydrauliköl (labelled bionol, only available like that in switzerland) vs. market leader (shimano) liquid to 100% gaseous chart:
Back to rumors.
Check out this shock. Looks like a new coil shock from Intend…
I’m not a petrochemical engineer, but I’m assuming there’s a 0-100% range because the fluid is a mix of chemicals with different heat capacities and boiling points? If so, I’m not sure the 100% boiling temperature would matter.
I think as soon as any significant percentage of the fluid boils, your brake is useless until it cools. (No idea what percent would be the threshold, my guess would be 2-5%)
Let's stop arguing about boiling points and get back to rumors.
I go by which mineral oil tastes the best anyways.
Some of the chemicals used in DOT 4/5.1 are used as ingredients in consumer goods at low levels, but then petroleum byproducts are used in some foods and as the sole ingredient in some consumer goods (e.g. baby oil and vaseline).
The DOT 4/5.1 fluids we're talking about are derived from petrochemicals too, but they require more significant chemical synthesis. Either way it's probably not a very meaningful point of difference given the amounts we deal with. But I'm not a chemical engineer so I've already gone way outside my expertise.
according to Harz enduro in the comments, a german guy that makes heaps of video with all the small companies in germany "we might know more wednesday" so let's see
Intend built a coil shock a couple years ago with an adjustable coil in collaboration with a student's graduate engineering program. Very cool concept.
https://www.diva-portal.org/smash/get/diva2:1609691/FULLTEXT01.pdf
The shock was built and there are photos of it somewhere on the internet but I can't find them.
So long as it's in moderation. The mineral oil is a known laxative!
wasn't it on one of the Trickstuff Trick Staff bike checks? all links lead to nothing now since they rebuilt the website
I always thought the name DB8 was funny considering the Mavens were released shortly after and also use mineral oil. My thought was: "sooo who's even debating anymore? That DB8 was short lived." Now I know who's still DB8-ing. 😭
That sounds right.
Intend has a countdown on their instagram story today that will end the morning of November 13th so that seems to line up!
https://www.instagram.com/p/CyvLifFt6Jp/?igsh=MWZxY3o4N3FrcXdsZg==
Found! It was on the Rides of Trickstuff #8
No full review but the pics are here
Well done!
New shock from Intend looks very different. We'll see what tomorrow brings.
Looks like we have been fooled. They announced new stem, rocksteady V2 cranks, and blackline forks in stock. But no new of coil shock
That coil shock gives me some serious CC Tigon vibes.
The Scout is a kids bike now.
Refreshed kids bikes from Transition too.
https://www.transitionbikes.com/Bikes_Scout.cfm
I wouldn’t say that. Don’t know many kids on a 460 reach bike. Weird way to do that
weird for sure, given the intended height ranges for it. I know adults that would fit the medium scout.
They’re listing it in their “Youth” section alongside the Bandit and Ripcord.
Teens and tweens are kids too. 😉
I'm a 5'9" kid too, at 41yo, a lil overweight for that lightweight rider kinematic layout thou
Actually quite nice they offer anything at all. I wish more brands would make bikes for...people on the edges of the size spectrum. I guess it's not the most profitable thing to do as a bike brand, in these times, but finding my 5'2'' wife a comfortable bike is actually pretty hard.