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It's quite possible the truth is in between the values, yeah. Bring the two travels together by a milimeter on each side and you're quite near a 2,5 leverage ratio for example. Bring them together by 2 mm on each side (4 mm total) and you're almost at a leverage ratio of 2.
155 and 170 sounds much better than 157 and 168.
"Cables and hoses run into the frame through the headset cover."
I was hoping the through-headset routing thing would not be a thing. But it looks like it's going to be a thing. I do not like this thing.
*pinner XC hardtails make awesome gravel bikes
Also, if they will be using mineral oil, I guess I'll be shopping elsewhere for my stoppers then. Which would be a shame, the RSCs have been mint for the 4 season i've had them now, 2 or 3 bleeds in total in the whole time, otherwise just changing pads.
Considering the lever looks exactly like the old one, just reprofiled (turned towards the bar a bit more) and considering they were testing a new caliper on the old levers... I'm hoping DOT stays. Replacing the seals for proto stuff is probably easy though, as long as they are available in the required size.
"We wanted to offer a ski in the same sense as our bikes, efficient and reliable. The choice of a full wood core was obvious, no reason to integrate carbon in a core when our bikes don't need it. Another essential element in the make up of a good pair of skis, the base. Not having a strong base and a good finish is a bit like driving a Porsche with the plastic tyres, it ruins everything."
The only benefit of DOT fluid I can see is the boiling temperature is much higher, but is that really an issue on MTB? can't say I've ever had an issue with mineral oil boiling.
I'll buy a brake for a myriad of reasons, but what fluid is in them is not going to be the determining factor (at all).
I do hope someone does an updated test like this with all the new stoppers... https://enduro-mtb.com/en/best-mtb-disc-brake-can-buy/
DOT 5 is dead in the water, apparently ABS systems could cause aeration and thus made it unusable in cars (as per wiki). That's why DOT 5.1 was made as it has the temperature ratings of DOT5 while still being ethylene-glycol based.
The video is still up, brake fluid part starts at 3:25:
https://www.youtube.com/watch?v=oF2vAOmplUI
As for why DOT, as has been mentioned, DOT 5.1 is DOT 5.1. The DOT in the name stands for Department Of Transportation, meaning it's tightly regulated. That's why DOT fluids from different manufacturers can be mixed and matched. So you can buy it, like mentioned, in any petrol station, spare parts store, etc.
Mineral oil is a WIIIIIIIDE term. Baby oil is a mineral oil, so is engine oil, suspension fluid, etc. It's even recommended to be used as a fertility preserving vaginal lubricant (as opposed to other lubricants?). Most importantly, going by the letter of brake manufacturers, you can't mix and match mineral oil suppliers. And there have been murmurs of Shimano oil swelling Magura brake seals or vice versa, if I remember correctly, indicating incompatibility.
Regarding toxicity, mineral oil can actually be carcinogenic as per wiki (depends on which mineral oil of course, considering the lubricant point above, but I'll fearmonger a bit if it helps my point
Regarding water solvency in the system... I usually have to open the reservoir to be able to spread the pistons in the caliper when changing pads. That can only be caused by a change in the volume of the oil, which can only be caused by water ingestion past the seals if you ask me. So in that regard my opinion is that water ingress is a real thing. With Shimano brakes for example the bleed port can be on the same end of the caliper as the banjo hose fitting (BR-M8020). With the front brake that puts both at the top of the caliper. How are you supposed to flush the bottom of the caliper in that case? I prefer the way water is absorbed into DOT fluid in this case.
As for black oil, bleed a Code R and a Code RSC. Or a Guide R(S) and an RSC. With RSC brakes the lever is anodized, including the bore. With the R and RS models it's painted. That means the bore is bare aluminium. With the R and RS models, the brake fluid that is pulled from the system is usually gray. With RSC brakes it's not. Can confirm this, I've done a bleed after well over a year not touching my RSCs and it was just visible when the old fluid flushed into the syringe mixing with the new one. I bet the colour of the oil is caused by wear particles of the master cylinder bore, the master piston (usually plastic) and the seals. And having an anodized (smoother, harder) master cylinder surface lessens that. Besides, brake fluid degrading would happen in the caliper, not in the lever. So the first pull of oil from the lever would be clean, the dirty part would be the caliper (which I think is usually cleaner than the lever as well).
My 2 cents.
At least with Mineral Oil each manufacturer (well the good ones at least) make their own and control it strictly... but that gets people pissed because they like to have options and will defy what is recommended to save a few pennies or just to be defiant.
The dry boring point of DOT fluid is completely irrelevant too, as it will only be in its dry state until you open the lid of the container. And even then all brake fluids/systems take in water through absorption or other, so the dry boiling temp is an almost entirely irrelevant stat.
here is screenshot and embed of the post
It's a mighty fine looking bike!
No chance. Best thing we can hope is that they figure out how to do it nicely and practical.