Hayes HFX Mag HD Disc Brake System

4.56/5 (27 Reviews)
MSRP : $199.00

Product Description

Designed for freeride and downhill riding providing 30% more braking power. 8" rotor deliver the ultimate stopping power with th "Moto" look. New dual piston caliper. Two piece master cylinder allows lever to be removed without removing shifters and grips. High durability sintered metallic brake pads. Kevlar reinforced brake line. 525g

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Reviews 1 - 15 (27 Reviews Total) | Next 15

User Reviews

Overall Rating:2
Value Rating:2
Submitted by Jason a Downhiller

Date Reviewed: March 18, 2013

Strengths:    Good stopping power

Weaknesses:    Fail randomly

Bottom Line:   
So far they have been good for me. But recently I was out on a technical trail and my back brake suddenly lost pressure and I lost control. Super scary and dangerous. I asked my local bike shop about them and they said multiple people have had similar problems with the same brake. So when they work, they work really great, but when they fail, they fail hard and fast. Just gotta be ready and on your feet.

Expand full review >>

Favorite Trail:   Any DH (The Canyons Resort)

Duration Product Used:   20ish Rides

Similar Products Used:   Avid Elixir 7

Bike Setup:   Trek Session 77

Overall Rating:5
Value Rating:5
Submitted by coiler16 a Weekend Warrior from st. louis, MO

Date Reviewed: January 3, 2010

Strengths:    responsive, easy to bleed, pad replacement can be done by a doped up monkey

Weaknesses:    a little loud, pads are expensive

Bottom Line:   
these brakes are great, i just replaced the pads, and the stopping power is unbelievable. its like hitting a brick wall. the best part is that i didnt even have to bleed them after i put new pads in. also, if you have to replace pads for these (or any hayes products) look for them online, they are really proud of their brakes and charge a fortune at a bike shop. i think i got mine for like $12 at pricepoint. they were twice that at my shop.

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Favorite Trail:   clarke forest

Duration Product Used:   1 Year

Purchased At:   ebay

Similar Products Used:   hayes sole

Bike Setup:   kona coilair supreme, 8 inch rotors f/r

Overall Rating:5
Value Rating:5
Submitted by Kevin a Downhiller from San Diego, CA

Date Reviewed: January 21, 2008

Strengths:    Amazing brake levers. Super easy to install, and very very plush stopping power. very rarely have to bleed them, and they work like a charm. Love the brake. would recomend it to anyone! SO uch easier to get out and go fast if you trust your brakes! and i trust the HFX-MAGs!

Weaknesses:    Snapped my first one off at the between the perch and the master cylinder. Not a weakness, just a recomendation to stay on your bike in rock gardens =D

Bottom Line:   
Sick brakes. if you want good stopping power that you can trust, buy them. they require little to no maintenance. Ignore the price, and just suck it up and buy them. you'll be glad you did.

Expand full review >>

Favorite Trail:   Shock Treatment, Mammoth Mountain

Duration Product Used:   2 Years

Purchased At:   BTI

Similar Products Used:   Avid juicy 7's. HFX-MAG 9's. HFX-MAG Orange, and Purple

Bike Setup:   Gary fisher Kingfisher 1. Manitou travis triple ti. Mrp Lrp. Fox DHX 4.0.

Overall Rating:2
Value Rating:2
Submitted by Matt from NJ

Date Reviewed: December 18, 2007

Strengths:    They've gotten me to this point in time.
Can take some hits.

Weaknesses:    Lever Reach Adjustment Screw, Brake Modulation, Bleeding

Bottom Line:   
Lever Reach Adjustment Screw - out of the box I had trouble with the screw backing out on more serious descents. The problem was fixed by carefully putting lock-tite on the screw, always making sure it didn't leak onto the lever bushing which results into a disassembly to clean. This problem was actually recognized by Hayes as a defect because the bushing with newer models now have nylon bushings. After that hurdle for the first year I routinely kept up on brake maintenance so they performed well. The problem I CONSISTENTLY ran into each time bleeding as per Hayes was back to the lever reach & adjustment. After step by step following Hayes directions my lever reach was always way out from the bar and the adjustment screw didn't have enough range to bring it close enough back to the bar. Certainly not close enough to brake with a single finger. It was as if there was too much fluid in the system. I had to release excess fluid each time, making a mess and risking getting air in the line. By doing this it brought my lever closer but my brake modulation was now affected. In order to compensate for the poor brake modulation I purchased softer brake pads. It helped but just another issue with my brakes.
Modulation - Over the brakes lifetime I had to apply alot of 'hand' power to try to maintain proper modulation, not good when railing a turn or on a steady descend. There was no consistent middle bite point to the pads. It was always alot of hand pressure it seemed when starting and during braking. I heard this could also be a result of soft brake lines, creating a spongey feeling with weak braking. My opinion of good modulation is soft lever pressure to firm (without locking rear wheel) and the braking acting accordingly.
Bleeding - Certainly cover your brakes, better yet remove them. The bleed valve is directly above the pads. The nipple on the bleed valve never can hold the drain hose properly and will mostly likely blow-off, sending fluid a flying.

***Because of consistently using my lever reach adjustment screw (allen key) during bleeding adjustments it has now become stripped. This results into not being able to remove your brake lever at all, let alone your whole MASTER CYCLINDER. I have a better idea rather than trying to figure out how to keep my Hayes HD's running........an entirely new brake company. Avid Codes, Shimano or Formulas are going to be on my Christmas list.

Expand full review >>

Duration Product Used:   More than 3 years

Price Paid:    $199.00

Purchased At:   online

Similar Products Used:   None

Bike Setup:   Santa Cruz Bullit, Marzocchi 7", Shimano, Sun Ringle, Thompson, WTB, Azonic, Atom Lab

Overall Rating:3
Value Rating:4
Submitted by Brad Chandler a Downhiller from CA, US

Date Reviewed: June 14, 2007

Strengths:    looks good. Stops pretty well

Weaknesses:    modulation, levers and cables.

Bottom Line:   
The hoses that come with them are too soft and give a mushy feel. I could not get the pads to sit well against the rotors. One of my levers stopped working and that kinda did nothing to impress me. I get a lot of screeching out of the set up. All in all I guess I would not get them again. Maybe I just got a bad one.

Expand full review >>

Duration Product Used:   1 Year

Purchased At:   LBS

Similar Products Used:   hayes HFX 9, Hope Mono M4, Shimano Saint.

Bike Setup:   Cannondale Gemini 900

Overall Rating:5
Value Rating:5
Submitted by grant from redlands ca us

Date Reviewed: June 6, 2007

Strengths:    OMG, major upgrade form soles, i got the B.F.L. also, and they fell great, and easy 2 finger braking

Weaknesses:    cable routing is a little weird on my hardtail

Bottom Line:   
great for freeriding, when bleeded correctly, i can pull down as hard as possible at full speed and not skid, thats so great for freeriding

I love them, with the V8 they are unbeatable for the price

Expand full review >>

Favorite Trail:   prospect

Duration Product Used:   Less than 1 month

Price Paid:    $160.00

Purchased At:   ebay

Similar Products Used:   hayes sole, hayes nine

Bike Setup:   GT ruckus
holly rollers
hayes mags (B.F.L.'s)
odi grips
mrp chain guide
mrp bones crank and BB
FUNN rims

Overall Rating:5
Value Rating:5
Submitted by Julio a Downhiller from the netherlands

Date Reviewed: March 7, 2007

Strengths:    Insane braking power
Great modulation
the design is the witch i like
lever feel is smooth

Weaknesses:    Bleeding the brake is dificult,for the rest off the brake i didn't find any weakness.

Bottom Line:   
This brake is good,stopping power is awesome and all that with 2 pistons,i was very impressed and it's better then the Hfx9 in terms off power and lever feel.The design off the caliper is the same as all hayes except the el camino.
But this is still the most use standard brake in the bike industry and that great that hayes is still good for all bikes from xc to dh.I'm glad im running the hayes again and i will upgrade it to a hayes 9 inch disc front/rear for more stopping power.

Expand full review >>

Duration Product Used:   Less than 1 month

Similar Products Used:   Avid juicy 5,hope m4,Hayes hfx9

Bike Setup:   on a stock session 10

Overall Rating:5
Value Rating:4
Submitted by Andrew a Downhiller from Nova Scotia, Canada

Date Reviewed: September 4, 2006

Strengths:    Great power, look good, easy to work on, easy to find parts, don't take long to break in. The brakes work much better with steel braided cables, which I just put on the rear brake.

Weaknesses:    Stock pads suck.

Bottom Line:   
These brakes rock. They blow my buddies HFX 9's out of the water; and his HFX 9's are very good brakes becasue he had them dialed properly. I would deffinetly recomend them to anyone. And anyone who says that they can't get them dialed or tat the brakes don't bleed right needs to get them looked at by a different shop. These brakes are a little heavy especially with 8 inch rotors, so i wouldn'y suggest them to anyone who is concerned about weight.

Expand full review >>

Favorite Trail:   Whopper

Duration Product Used:   6 months

Price Paid:    $100.00

Similar Products Used:   Magura Clara, Shimano Deore.

Bike Setup:   03 Norco Torrent, 03 Marzocchi Junior T, Truvativ, .243, Block 8, Sram, ODI, Axiom

Overall Rating:5
Value Rating:4
Submitted by jake sammy a Weekend Warrior from england

Date Reviewed: August 15, 2006

Strengths:    The lever looks nicer in real life than in pictures.
BIG power

Weaknesses:    Next to no modulation, but,fit hayes b.f.l levers and you fix that problem.
Squeel during bedding in, but it sorts its self out

Bottom Line:   
Really good brakes now the bfl levers are fitted.then again you could save 30 quid and learn not to be so fat fingerd.to be honest though you might as well get the nines. there cheaper and they have nearly the same power. very good though. I've got the hd versions, good for downhill but get the plus's if your into your xc, otherwise the weights just not worth it.

Expand full review >>

Favorite Trail:   chicksands

Duration Product Used:   Less than 1 month

Price Paid:    $300.00

Purchased At:   chinease imports (and yes they are genuine and they did come!!)

Similar Products Used:   Hayes nine.Hope mini/m4 and m6. avid juicy 7 and 5.
MX2 lol

Bike Setup:   04 big hit frame. boxxer race. specced with gusset,truativ,halo and atomlab.

Overall Rating:5
Value Rating:5
Submitted by nathan a Downhiller from hamilton

Date Reviewed: July 2, 2006

Strengths:    looks cool
stops every time
doesnt squeek

Weaknesses:    nobody knows how to set them up

Bottom Line:   
if you want good equipment you have to take care of it. show it a little love and it will love you right back... its as simple as that.

you cant just expect to throw it on and have the rotors allign perfectly.. get some shims if you have to. a 5 year old could do it.

lastly.. this is a 2 finger brake.. if you grab it with all 5 you will go over the bars.. its a fact of hydrolics

everybody also complains about modulation..ooo these brakes suck for modulation. to start with it helps to have properly bled brakes... and in my opinion the modulation is in your fingers not your brake..

full chillies all aroud for this bad boy

Expand full review >>

Duration Product Used:   2 Years

Similar Products Used:   avid

Bike Setup:   2 wheels, a fork and handlebar you know..

Overall Rating:5
Value Rating:5
Submitted by Jeremiah a Weekend Warrior from Marquette, MI

Date Reviewed: April 14, 2006

Strengths:    Simple to work on, widely available parts, durable

Weaknesses:    intermediate modulation

Bottom Line:   
For any sort of extreme riding, these brakes w/ 8 inch are excellent. There are better brakes for 6 inch applications(xc, etc).


There is no perfect brake system out there, and there never will be. Every single brake system ever invented, whether disc or rim, takes some amount of tweaking, futzing around, and playing with to get it right.

Take the little bit of extra time to be a little bit OCD while setting these up and making any necessary adjustments. I have used these brakes on my two current bikes, and several others, and have never had any major problems with them. Any time they rub, I spend 2 or 3 minutes readjusting the caliper so they don't. Any time they scream, I take a few minutes after the ride to sand the pads a bit and rub down the rotors with alcohol, and it goes away for a long time. Any time power and modulation starts to suck (and this has only been twice in a total of over 4 years use with 8 individual brakes) I have a trusted and professional bike mechanic bleed them for me, because it's not something I've ever been able to figure out how to do right. If you also do these things with your brakes, they will work beautifully, just like they're designed to.

How do they compare: Shimano has slightly better modulation, but less high speed power. Avid is a way more finicky system to set up, and roughly equal on power and mod.

Modulation: Sure, they don't modulate at the world-class level of some brakes available, but for the price, it's worth learning how to use these right. If you spend some time using them, you will be able to modulate them perfectly, like I can.

Bottom line: If you put these brakes on and never touch them again, you will hate them, guaranteed. If you love on your bike, and put some TLC into your brakes, they will stop you every time.
Buy these brakes for any extreme application requiring 8 inch rotors and a lot of stopping power and durability. Use a high end Avid, Shimano, Magura, etc. for xc or similar use.

Expand full review >>

Favorite Trail:   Hardtail Pride

Duration Product Used:   1 Year

Purchased At:   Came on bike

Similar Products Used:   Shimano XT (6&8inch), Hayes 9 (6&8inch), Avid Juicy 5 (6&8inch)

Bike Setup:   8" Iron Horse SGS w/ Shiver & 8 inch rotors, and a Soul Cycles hardtail w/ DJII and 8 inch rotors

Overall Rating:5
Value Rating:4
Submitted by calen a Downhiller from marin county CA

Date Reviewed: December 6, 2005

Strengths:    über power
easy to modulate
low key all-black
never f-up

Weaknesses:    not really any

Bottom Line:   
I use '05 MAGs for freeriding and downhilling and i love 'em to death. have never encountered a situation in which i wished these brakes had more power - you can always dig into them a little deeper to stop on a dime. big, blocky calipers + metallic pads take heat really well. i slapped BFLs on my set and they add smoothness and comfort. a hundred dollars cheaper than juicys and they work better.
Bottom line:
'05 MAG levers stay in adjustment, calipers generally don't drag, rotors do not glaze up like juicys do, pads don't burn like martas do, way more power than HFX9 HDs - best all-around brake i have ever ridden
get them if you only want to buy one set of brakes ever.

Expand full review >>

Favorite Trail:   dirt merch to A-line

Duration Product Used:   6 months

Price Paid:    $300.00

Purchased At:   LBS

Similar Products Used:   HFX 9 XC, HD, magura marta SL, - a lot, juicy 7s - only several rides

Bike Setup:   transition dirtbag, marz z-150, nevegals, hadley/729 dubs - 45 lbs

Overall Rating:5
Value Rating:5
Submitted by Andy a Weekend Warrior from Ft Collins, CO

Date Reviewed: March 17, 2005

Strengths:    Great one-finger braking.

Weaknesses:    Bleeding took a few tries.

Bottom Line:   
Great brake. I've got the 8 inch up front. Modulation is amazing. The bleed took me a few tries to get, but I got it and the feel is impeccable. Key is to take your time and take the thing off your fork and let it hang straight down. Some of those bubbles take a long time to get through the system so be patient!

I can't help but think the people who don't like this brake either don't know how to set it up and/or don't know how to ride. Grab a handful and yer goin' down. This is a one finger brake. Brake mounts are often not perpindicular to the axle so bolt it up, put a sheet of paper behind it, look at it, and get some shims to adjust the thing. It really isn't that hard.

Expand full review >>

Duration Product Used:   6 months

Price Paid:    $130.00

Similar Products Used:   Avid mechs, Deore hydro

Bike Setup:   Heckler, Z1 FR SL

Overall Rating:5
Value Rating:5
Submitted by Bill Brune a Cross Country Rider from Santa Cruz, CA.

Date Reviewed: February 10, 2005

Strengths:    solid braking power, and quiet too!

Weaknesses:    none, if set up correctly, total failure possible if you don't get them bled correctly.

Bottom Line:   
These are great brakes. The rub is that you really have to pay attention to bleeding them correctly. A couple of times I bled them out on the bench, levers felt good and hard, seemed very solid, even after a ride around the block. Took them out on the trail, and had almost complete brake failure. What happens is that a tiny air bubble left in the calipers -given some vibration from a trail, works its way up to the master cylinder and your brake levers start pumping air. -Very important, squeeze the calipers to their seated position with the master cylinder open to make sure they seat. Then make sure the master cylinders are straight up when you bleed them. Squeeze fluid all the way from the bottom calipers up through the master and out to your collection bottle (watch for the little air bubbles from the calipers before you think you are done) Be very gentle with the fluid that you squeeze into the calipers during this process, you don't want to make ANY bubbles. If you get this right, then you will have true 1 finger braking. If you don't get this right, then expect noise, grinding, not much power and maybe a real pucker when you start pumping air. -cheers.

Expand full review >>

Favorite Trail:   magic carpet

Duration Product Used:   3 months

Price Paid:    $150.00

Purchased At:   price point

Bike Setup:   SC heckler - Z1-FR / 8" disk up front, 6" disk in back
custom build (no shimano!!!) SRAM rules.

Overall Rating:4
Value Rating:4
Submitted by John a Cross Country Rider from AZ

Date Reviewed: June 29, 2004

Strengths:    Great power, reliable.

Weaknesses:    None so far.

Bottom Line:   
This is my 4th set of Hayes brake and have had very few problems. I broke the lever mount on my HFX-Comps, but they are plastic, so it is expected. Great brakes.

Expand full review >>

Duration Product Used:   More than 3 years

Price Paid:    $180.00

Purchased At:   Used

Similar Products Used:   Hayes Hydro 6", Hayes HFX-9, Hayes HFX-Comp, Magura Julies, Magura HS-33's

Bike Setup:   Single Speed with...Hayes HFX-Mag 6"

Reviews 1 - 15 (27 Reviews Total) | Next 15

Review Options:  Sorted by Latest Review | Sort by Best Rating

Hayes HFX 9 XC vs MAG vs HD

What are the differences in these variations of the HFX 9 brake line? I have seen... Hayes HFX 9 HD Disc Hayes HFX 9 XC Disc Hayes HFX Mag Disc The XC offers V6 or V8 rotors so i dont think its as simple as rotor size....Read More »

Hayes HFX Mag HD???

i was just wondering your guys opinion on the hayes hfx mag hd brakes. i mostly DH and freeride. will the brakes suit me?Read More »

Hayes HFX mag and HFX-9 HD???

What is the difference between the HFX mag and the HFX-9 HD? Also could I run 6 inch rotor with the HFX-9 HD? ThanksRead More »

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