fjyang

"fjyang, if you are correct then you're in the wrong business. What you're doing is manufacturing energy out of thin air. You should be manufacturing power with your magic fluid power plant."


The fluid themself don't have magic powers but how you use/applied them might. You pressurized the hydraulic system and purge all the air out so when you pull the lever and that piston forcing all the dense fluid in the line, they have no where to go but forcing all the energy into that little spot in the caliper.

Think of the graden hose as your brake line, the hose is pressurized, and when you pull that sprayer....magic. The water is still water.

The advantage of hydraulic system in mountain biking is not as evident as other applications as the reservior in bikes holds vary little fluid. The problem with hydro's is once you got air in the line, you lose all power.

It might be fun as a experiment to see if someone can invent a pulley system on mech. brakes to increase their power/leverage in a compact size.

k_freese

Somebody in a post way back menioned that it's possible to use levers designed for v-brakes with mechanical discs if you use teflon coated cable-housing. Is this true? Would it be annoyingly difficult without teflon coated cable-housing? Anyone tried?

dminor 

That has actually been done (to a degree) with the Problem Solvers Travel Agent (allows cantilever levers to be used with V-brakes). Remember to get mechanical advantage via puleys, you have to pull more cable. There's a physical limit to how much cable a bike brake lever can practically pull.

euroford

over 1 year without having to bleed and/or adjust the saints in any ways....

how would the mechanicals be doing after a year?

SD Fixed

I was looking on a thread or info on disc brake primers..

So, I'm to gather, that

mechanical is a little easier to set up and maintain, but perhaps a little more problem prone.

Hydro is harder to set up and maintain, but noticably better on the endurance side.


Repair on the trail is better with a cable vice hydro.

Hydro you can modulate better than cable.

Am I right so far?

Jules Manson

um who cares about the brakes as long as they werk

willtsmith_nwi

Correct, and hydraulic systems have EXACTLY the same constraint. If they didn't you'd be manufacturing power out of thin air thereby violating the 2nd law of thermodynamics. Leverage just means your translating force expressed over a large distance into force expressed over smaller distance. The more you amplify the input force via leverage (via levers, pulleys, gears or hydraulics), the less travel you get in the output.

The levers we use currently actually have far less leverage then those used on the center pull cantilevers. You want more power, put one of those old levers.

You don't think the throw arm on a BB-7 could be made larger??? They're calibrated to get a good amount of travel on pistons so that the pads can effectively engage the rotor. If you double the mechanical advantage, you will half the travel of the piston. There is no way around this, that's how mechanical advantage (leverage) works.

DonValley

The larger the rotor, the more brake swept area (the more material passing through the friction of the pads per rotation). Hydraulics hoses lose effeciency through swelling (since fluids are basically non compressible), cables lose effeciency through stretching and friction. Cables stretch more than hoses swell, therefore the hydraulic has an advantage here. BTW, my power brakes don't use vacuum as a booster, but an electric pump (VW Corrado).

Minesbroken

in the real world...both brakes will stop you just fine...less tinkering with the hydros as they self adjust...more tinkering with the mechs as they do not...alittle more power is needed at the lever for the same stopping power on the mechs...
a good set of v brakes will stop you also

arguing over the difference....is still fun to watch.
*makes popcorn*

ed 

That's been done too. A prototype that never took off.

A single 9" rotor is also readily available. (but that prob. won't increase stopping power either, eh?)
https://pricepoint.com/detail/14889-115_RDRRT6-3-Parts-158-Brakes/Disc/Red-Raven-9''-Rotor-w_-Adapter-Kit.htm

Stacey

Extra butter please, my cholesterol needs a kick.

Raiyn

Applesauce.

fjyang

Are you the newb?

Minesbroken

fjyang

But your the guy who keep preaching to the newbs how all knowing you are? I just hope no 12 year old hurt themselfs with your ideas. Great attitude you got there, hope you go far in life with it.

fjyang

I guess you just want to wast some bandwidth with these junk response as most people will not allow you to attack and insult them like you do, I have to reply. You just don't know when to stop? You have steam roll your idea down everyone's throat if they have an different opinion? I'm sure you have posted things that is incorrect and when people correct you, you take it as personal attack. idiocy is you in my opinion.

fjyang

Your sense of truth and someone's truth can be vary different.....yes, there seem to be no end in sight with this crap. If you know when to stop, you won't be posting all these attacks. Its come down to personal attacks here....so keep going.

fjyang

I guess we just have difference in opinion, right? you can't accept that? By calling people idiocy is not personal attack? What would you do when people call you idot?....they have to reply in kind. I guess this show must go on.

fjyang

Lots of other people have different opnion with you regarding mech. and hydraulic brakes on this thread/forum, why don't you attack all them to? and call all their ideas idiocy too? You got some personal issues with me that I should know about?

mtnbk3000

+ 2173

Brian

Pete, can you do me a favor and just chill a bit? I haven't read the whole thread, but I've seen enough of these to know what kind of misinformation gets posted. You'll never educate everyone, so maybe it's just best if you give it a rest. If you really need to find something to argue or debate, VC would be a much better place. Thicker skins and all.

Thanks.

fjyang

Others just don't want to waste time with you like me here, The funny things is, I thought you're a confused newbie too here too....I guess we can agreed on somthing here

fjyang

I've been riding motorcycles since I was 16, longer than I've been driving and much longer than mountain biking....so just because I come back to riding bicycle for health reason after 15 years, I'll have no clue on hydraulic brakes? I have change pads, bleeding brake lines and replace master cyclinders on cars and motorcycles perhaps when you still on diapers. The basic concept of hydraulic brake have not chagne since your born so you're no enlighting us with any new stuff here.

I'm not that "low" like you posting threads that have nothing to do with you and just because you join this forum March. 2007 and that make you an expert? People can just see from your pass threads and post that you're just a angry/rude individual looking for fights all over the place.

Please go get laid and lighten up for us would you? That would help a lot in your case.

fjyang

You can't read stuff in contex? Do you have to debate everyting out of contex? The rotors, calipers, master cyclinder and tires.....just because I did not mention it does not mean I don't know its there....they all play their part. You're talking about bigger rotors does not provide more power! and when I differ with you...and you outa control.

Wow...you been involved with this forum since 2003....You must be GOD!

I have not ride bikes in 15 years but rode before I stop, then I must be newbie.....that is not fallacy?

What is germane to the discussion is that you're an ass to everyone. When you're ready to drive a car, ride a motorcycle and plane ride, please take a look at whats stopping them. Feel free retrofit your car, motorbike with mechanical brakes...and please put extra extra small rotors on them cause they have nothing to do braking force.

You can live in your mountain bike world.....but the rest of the world have a much bigger physical force to deal with than bicycle. Only in a bicycle forum can this kind of debate exist.

When I told you to get laid, I sincerely mean it. Try it and by tomorrow you'll be writing in much gentler and kinder attitude. Its vary therapeutic.

ps. Please put extra wide tires on your retrofit, the bigger the better

Nickds7

lol at last 13 posts.. chill out.