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Hayes Hayes MX4 (OEM Only) Mechanical Disc Brake Caliper

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# of Reviews 16
Average Rating 3.94/5
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Description:Hayes MX4 (OEM Only) Mechanical Disc Brake Caliper
  • Entry level disc brake
  • Compression spring for lower lever effort and smooth action
  • Outer thrust bearings
  • Multiple bearing ball ramp system for smooth feel
  • 2 piece die cast body with stiffening bridge bolts
  • For use with V6 or 6 inch round rotor
  • Weight: 325g
  • Color: Black



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    Submitted by mchlwaters a Cross Country Rider from California
    Date Reviewed: September 19, 2008
    Favorite Trail:Saratoga Gap
    Duration Product Used:6 months
    Price Paid: $1100.00
    Purchased At:The Off Ramp Santa C
    Strengths:I had a Cannondale F400 Hard Tail and traded up for a Giant Trance.. It has the OEM Hayes Breaks. I rode down Mission Peak in Fremont Ca 2,500 Feet of down hill fun. Like Disney Land 2 hours up and 30 seconds down. Hit 37 MPH. The Breaks Rock and stop.
    Weaknesses:None that I can find at this point. Disc are the way to go. Suspect replacement might be a challenge finding(Pads?).
    Similar Products Used:My wife has a GT with Shimino V7 I think (spelling) Disc Breaks. They work well too. All my other bikes had Rim Breaks.
    Bike Setup:Stock 08 Giant Trance 2. Large frame - has lots of cool stock upgrades compared to most.
    Bottom Line:Disc Breaks - are the Best option no question. For the price I paid for my bike the OEM Disc Breaks are excellent no question. - These breaks work and help me keep the rubber side down. If these are basic - the next levels must be awesome! Unless your pickey and want more flash - bigger name and have lots of extra cash these breaks are excellent.
    Value Rating:3Overall Rating:4

    Submitted by Mondoman1 a Weekend Warrior from Seattle, WA USA
    Date Reviewed: September 8, 2008
    Duration Product Used:6 months
    Purchased At:OEM on my '08 Giant
    Strengths:Simple, robust, works well.
    Weaknesses:No simple outboard pad adjustment. Hard to find info/specs for this model.
    Similar Products Used:Avid BB7
    Forte (rebranded Tektro IO)
    Bike Setup:'08 Giant Yukon mostly stock, w/MX-4 brakes & Tektro levers
    '07 Columbia "iron bike", bent into shape & upgraded w/Forte front disc.
    Bottom Line:My Yukon is the first bike I've had with stock disc brakes, and I'm happy with them. I'm a hefty guy (>200lb), but so far they've done a great job stopping the bike, even on 25mph+ downhill runs. My runs include a lot of hills (it's Seattle) and are so far 2/3 pavement, 1/3 gravel/hard dirt. I'm able to easily modulate both front and back from slightly rubbing to locking the wheel. No runs yet in the rain/mud, but I certainly don't feel any need to upgrade the brakes. If BB7's rate a 10/10, I'd give the MX-4 8/10.
    Note: the Hayes installation/adjustment/maintenance sheet for the MX-4 is the same one as for the MX-3, so just download the MX-3 file on the Hayes site.
    Value Rating:4Overall Rating:4

    Submitted by StumpyP a Cross Country Rider from Scotland
    Date Reviewed: August 25, 2008
    Favorite Trail:Glentress/Monster trails
    Duration Product Used:3 months
    Price Paid: $60.00
    Purchased At:Adrenal Fuel
    Strengths:Cheap, quick & easy to fit
    Weaknesses:None yet
    Bike Setup:Specialized Stumpjumper, Azonic bars & Shorty Stem, Mx4 Front Disc Brake, Shimano XT Vee brake Rear, DMR V8 Pedals, Country Mud Michelin tyres, Mavic Wheels, Avid Juicy speed dial brake levers
    Bottom Line:I put these on as per instructions and using a torque wrench, and they work amazingly! They came with an Avid juicy brake lever. Great stopping power. Of course they wont have Hydro power, but def a vast improvement on V brakes. Work like a dream in the wet & mud, and they are quiet! Would be happy to put these on the back too....
    Suitable for XC, trails, road use not insane downhill riders!
    Take the time to set them up and you wont be disappointed
    Value Rating:5Overall Rating:4

    Submitted by bikeguy a Weekend Warrior from KC MO
    Date Reviewed: April 9, 2008
    Favorite Trail:City
    Duration Product Used:3 months
    Purchased At:LBS
    Strengths:Brakes very fast and strong.
    Weaknesses:Seems to pull rotor towards inactive pad (inner) a little too much..I think I will adjust that with an allen wrench.
    The rotor was rubbing then i loosened the tire and straightened it out and tightened it now ok...so basically its kind of hard to get on perect when adjusting tire. Actually bent with hand then banged with hand and got it back true LOL oh well..seems OK now!
    Similar Products Used:none
    Bike Setup:came with DB Response Sport 07
    Bottom Line:Seems OK to me....I haven't heard any noise either..so far.
    Good Brakes...Im sure there are better tho.
    Not sure how much they cost cuz they came with bike.
    Value Rating:5Overall Rating:4

    Submitted by Nate a from Ashland, OR
    Date Reviewed: April 2, 2008
    Duration Product Used:1 Year
    Strengths:Works sorta'ish
    Weaknesses:Rear brake has hung up on and off since day one, front brake barley works in less than perfect conditions.
    Bike Setup:Iron Hores Sachem 4.0, Saint Cranks, Kore Pedals, Soon new Hydrolic Brakes, everything else stock.
    Bottom Line:This is my first bike with disc brakes I was expecting alot more. They have alot less stopping power than they should and are EXTREMELY NOISY. No wonder hayes wont admit to making these.
    Value Rating:3Overall Rating:2

    Submitted by JBL a Weekend Warrior from Canada
    Date Reviewed: March 26, 2008
    Favorite Trail:Hardwood Hills
    Duration Product Used:1 Year
    Purchased At:Kamakazi
    Strengths:Strong back brake. Good in any weather.
    Weaknesses:Front brake is weak.
    Similar Products Used:Hayes Sole
    Bike Setup:Kona Shred
    Bottom Line:Amazing quality.
    Value Rating:4Overall Rating:4

    Submitted by JRL a from CANADA
    Date Reviewed: March 15, 2008
    Favorite Trail:Hardwood Hills
    Duration Product Used:1 Year
    Purchased At:Kamikaze
    Strengths:Not much fade, cheap to maintain, good on snow/ dirt, have been put trough hell
    Weaknesses:Front brake kind of weak
    Bike Setup:Kona Shred
    Bottom Line:Very good for price good for beginners.
    Value Rating:4Overall Rating:4

    Submitted by Robert a Cross Country Rider from Wisconsin/North Dakota
    Date Reviewed: February 12, 2008
    Favorite Trail:anything involving dirt and/or snow
    Duration Product Used:1 Year
    Strengths:WHAT IS GOING ON!? Okay now that I have that out of my system. Um, strengths... a good hard object to throw at someone, I guarantee it will cause damage with a good hit. Well vented discs... though kind of ironic considering the brakes themselves. Coooool black color, hm that's all I can think of now.
    Weaknesses:Very small pads, about the size of a dime. The pads fit sloppily. Looking at it right now, the moving one is crooked (can't be fixed). Ridiculous adjustment ability. Allen wrench needed to adjust outter pad. Inner (moving) pad only adjustable by changing cable position. My rear brake would hang up badly, (from 10mph it would stop in under a second). I had to drill out the mount holes to allow it to be moved inward farther. Some people mention noise, this is sort of inherent to discs. Stopping power is nothing to shout about. My bro had the same bike and brakes, his front one got bumped I think, and he went over the front because the front wheel was locking up with a very small amount of pressure. I fixed this but it shouldn't have happened to begin with. No real listing for the pads it uses, I assume the same as MX3s but it's kind of funny, nobody acknowledges that these exist.
    Similar Products Used:Avid BB7s
    Bike Setup:Giant Yukon (i bought it for the frame, that's it). Avid BB7s front and back. Avid speed dial levers. Flack Jacket brake cables. I'll tell you, the stopping power is insane compared to the Hayes. Also, Marzocchi All Mountain 2 2007 fork.
    Bottom Line:When it comes to bikes, the higher end of one technology is usually better than the low end of the seemingly higher end technology. In this case, discs vs rim brakes. My old GT bike had relatively good quality V brakes that had much better stopping power than these MX4s. I bought the Giant Yukon for the frame (I am very tall and they offer the 24" frame) knowing that I would be replacing most of the components, including the ENTIRE brake system which I have done. I am writing this based on higher expectations of mechanical disc brakes. I weigh 200lbs and ride hard so I need some power. For the basic rider, these could be okay as far as brakes in general, but be careful with that front one as these seem to be unpredictable. I hope this was helpful. Happy Biking!
    P.S. For value, i'm not sure, they obviously are cheap, so i'll give them a 3 seeing as they CAN stop you.
    Value Rating:3Overall Rating:2

    Submitted by Dale Mills a from Wales
    Date Reviewed: February 10, 2008
    Duration Product Used:6 months
    Strengths:Great & Quick Stopping Power.
    Weaknesses:Very noisy alot of the time. In nearly every kind of weather.
    Similar Products Used:Avid Juicy 5
    Bike Setup:Kona Shred
    Bottom Line:They're very good brakes but just goddam noisy that pulls attention of everyone in a radius of about 10 miles :)
    Value Rating:4Overall Rating:4

    Submitted by Juan Jraff a Cross Country Rider from Jakarta
    Date Reviewed: January 22, 2008
    Favorite Trail:Everywhere
    Duration Product Used:3 months
    Price Paid: $42.00
    Purchased At:Shops near Home
    Strengths:Smooth, Strength
    Weaknesses:None
    Similar Products Used:Hayes MX 3
    Bike Setup:Da Bomb
    Bottom Line:These Brake very great (Price, and Performance)
    Value Rating:5Overall Rating:5

    Submitted by matt mc taggart a Weekend Warrior from Australia
    Date Reviewed: December 28, 2007
    Favorite Trail:my place
    Duration Product Used:Less than 1 month
    Purchased At:croydon
    Strengths:bites quick
    great stoping power
    Weaknesses:nothing
    people say they warp real easy tho
    Similar Products Used:shimano v-brakes
    Bike Setup:08 norco katmandu (white)
    Bottom Line:great brakes all round if you dont plan on doin DH
    Value Rating:4Overall Rating:5

    Submitted by Dan a Weekend Warrior from Tucson, AZ
    Date Reviewed: October 22, 2007
    Duration Product Used:1 Year
    Strengths:Reliable, cheap, quick bite, inexpensive to service
    Weaknesses:Difficult to modulate, discs warp easily
    Bike Setup:2006 Iron Horse Maverick Team
    Bottom Line:These came on my Iron Horse Maverick Team bike. I've been pleasantly surprised at their performance given the price. They bite very fast and very hard, and do not fade very easily. Definitely stop quicker than even good V/cantilever brakes. I've ridden through some wet trails and the venting seems to shed water effectively.

    Adjustment and service has been quite simple and relatively cheap given that they are entry-level.

    One complaint is that modulation is tricky -- these things are either on or off. This is the case with many entry-level disc brakes. It will take some getting used to, so be careful the first few times or you will lock the tires up FAST.

    Another issue is that the discs seem to bend/warp easily. I don't ride my brakes or abuse them, and I already had warped a disc in the first few hundred miles. Sorta annoying since I don't ride every day, but the replacement disc was relatively cheap. Performance Bike did have to order it since the Avid discs are considered inferior.


    I wouldn't buy these off the shelf, but if you're looking at a bike that has them installed, it's a good setup. If you really need to upgrade, I suggest the Avid BB5 or BB7s, as they can be had cheaply on eBay.
    Value Rating:5Overall Rating:4

    Submitted by Jeff a from Ontario
    Date Reviewed: August 7, 2007
    Duration Product Used:Less than 1 month
    Purchased At:Sportchek
    Strengths:Great stopping power...i think....
    Weaknesses:could be designed better.... noisy when wet
    Bike Setup:Iron Horse WArrior 3.3
    Bottom Line:good.. for its price
    Value Rating:5Overall Rating:4

    Submitted by Ali summerly a Cross Country Rider from newcastle
    Date Reviewed: July 3, 2007
    Favorite Trail:chopwell
    Duration Product Used:Less than 1 month
    Purchased At:sunset mb
    Strengths:Great stopping power great break
    Weaknesses:Only one the noise pee's me off sometimes :@
    Bike Setup:cross country bike kona firemountasin great braks for the job
    Bottom Line:fantastic breaks but slitly let down by the noise
    Value Rating:5Overall Rating:4

    Submitted by ben prager a from kingston
    Date Reviewed: May 30, 2007
    Duration Product Used:Less than 1 month
    Purchased At:JJ cycle
    Strengths:Amazing breaking power, as soon as you feel it you think they are hydaulics.
    Weaknesses:a little noisy once in a while
    Bike Setup:Devinci District 1 with maxxis holyroller's and Sun Ringle eight track
    Bottom Line:great break, came with my bike and im so happy with them!
    Value Rating:4Overall Rating:5

    Submitted by bernie a Weekend Warrior from Laguna and Pangasinan, Philippines
    Date Reviewed: April 11, 2007
    Favorite Trail:Bolinao PATAR Trails
    Duration Product Used:3 months
    Purchased At:stock bike
    Strengths:Powerful, smooth and is very reliable, feels hydros on the lever.
    Weaknesses:sometimes so noisy
    Similar Products Used:XT and LX Hydraulics
    Bike Setup:HARO Shift R3
    Bottom Line:The brake system is enough for mild trails and is very good enough for cross country use. Do not use on eztreme drops and extreme trails. Worth for its price.
    Value Rating:4Overall Rating:4






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