K2 / Proflex Riders Group

General => Tech Forum => Topic started by: Dennis on December 08, 2003, 09:27:36 am

Title: thoughts on disc brakes?
Post by: Dennis on December 08, 2003, 09:27:36 am: so, I am going to be building a DH/FR bike after all.
I got a really good deal on a used Shiver DC fork and DH wheelset and I am getting a great deal on a new overstock Haro Werks DHR frame (made by Intense).
I have an opportunity to buy a set of Hayes brakes with 8" rotors for under 200.00 USD. they are two pot brakes I think.
some DH brakes are 4 pot, and Hope is even now making 6 pot brakes.
any thoughts on advantages of the multiple caliper brakes?
I wish IFO was here, he knows all about this stuff.
please let me know what you think.
[smiley=groucho.gif]
Title: Re: thoughts on disc brakes?
Post by: Matno on December 08, 2003, 12:27:24 pm: What? No carbon frame? :o

Go to the "Host site" link to the left. The idriders forum is all about downhilling. They know disc brakes as well as anyone, and IFO is still there... 8)
Title: Re: thoughts on disc brakes?
Post by: Simon on December 09, 2003, 07:19:34 am: The more pistons the larger the surface area applied to the pads, thus more power ,with more power comes more heat build up,the larger surface area will disipate the extra heat,so multiple piston systems are ideal for D/H use,multiple pistons also give the option of running variable size pistons within the caliper, eg Hopes new 6 pot.http://www.hopetechnology.com/technical/technical_index.htm
http://www.hopetechnology.com/technical/images/mono6ti_caliper_exp.gif
Simon
Title: Re: thoughts on disc brakes?
Post by: dmc on December 09, 2003, 01:34:54 pm: I've got 4 pot Hopes and my mate just got 2 pot hayes on his Kona and they have more than enough power, I would be happy with both. dmc
Title: Re: thoughts on disc brakes?
Post by: Matno on December 09, 2003, 11:23:14 pm: As far as that goes, I don't think ANY disc brakes have a problem with power, per se. Thus, your best bet is to go for models that have the best modulation and least brake fade on long downhills.
Title: Re: thoughts on disc brakes?
Post by: Gordo on December 10, 2003, 05:54:42 am: I know the hayes would be a good bet. I would stay away from Shimano XT discs (the four pot ones) a friend of mine has them and they keep breaking near the lever and losing pressure.
Title: Re: thoughts on disc brakes?
Post by: Simon on December 10, 2003, 05:56:45 am: Multiple pistons not only increase power but they can reduce brake fade often found in extreme D/H situations by disipating the extra temperature produced ,also as they can have multiple pistons of varying sizes within a caliper, brake feel and modulation can then be improved over a 2 pot system,though multiple systems are probably overkill for the average rider even for D/H,probably pro D/H riders would be the only ones to benefit from there performance,hope did produce a 4 pot X/C system but they appear to now favour the 2 pot mini system for X/C,they also do a 2 pot and 6 pot D/H systems, [smiley=nod.gif]
Title: Re: thoughts on disc brakes?
Post by: Jeff77 on February 12, 2004, 11:07:22 am: I have the hope mono mini discs (two pod) and am quite satisfied with the power and modulation especially in rain and snow... Not sure how well they would work for downhill applications though as this is not my forte...