Promax XC 3.0 Mechanical Disc Brakes Disc Brake System

3.17/5 (42 Reviews)


Product Description

High quality & great price! The Promax XC Mechanical Disc Brake is the most affordable in the category. Forged lever with low-friction pivot bolt, heat-treated one-piece stainless steel rotor & floating caliper for smoother braking. Includes extra lever, cable, housing & bolts.


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Reviews 1 - 15 (42 Reviews Total) | Next 15

User Reviews

Overall Rating:4
Value Rating:4
Submitted by Matt a Cross Country Rider

Date Reviewed: August 28, 2013

Strengths:    Completely Adjustable


Weaknesses:    Heavier
Rotor likes to run hot with excessive downhill braking


Bottom Line:   
I picked up a GT Timberline 1.0 today, and installed on it was front and rear Promaxs. The shop adjusted the rear brake because it felt "spongy". I take the bike on it's maiden voyage and find the rear brake was rubbing hard. The caliper was tilted, probably due to under tight from the shop. Within 2 minutes, I make quick adjustments on 4 hex bolts to the horizontal and vertical placement. Made sure everything was tight, gave the tire a good spin. Zero rub and noise. Hopped the bike a few times (Now, i'm no small guy 6'3" 250) and ran like a charm. I was impressed with how easy, and quick it was to make the brakes true again. I can see if the rotor gets warped, or pads get worn wrong on the trail and it rubs or makes noise, that with-in a few minutes you can get your brakes running true and get your bike back home to get some new equipment on it.

Expand full review >>

Price Paid:    $500.00

Similar Products Used:   GT Aggressor
Specialized Rock Hopper


Bike Setup:   GT Timberline 1.0 factory

Overall Rating:4
Value Rating:4
Submitted by 6sharky9 a Weekend Warrior from usa

Date Reviewed: August 17, 2011

Strengths:    Inexpensive. Good stopping power. Easy to adjust.

Weaknesses:    None as of yet.

Bottom Line:   
Ill just say its all in proper adjustment. When I first used the brakes on a wally world xr 200 I purchased from a pawn shop; I wasn't very pleased. I re scuffed the disc and put on a new set of pads and did some adjusting. Now I am more than pleased with these brakes. I like them so much that I will convert the rears to promax as well. Don't let the price fool you. They could be $300 brakes and not work very well without proper adjustments.

Expand full review >>

Duration Product Used:   3 months

Price Paid:    $30.00

Purchased At:   pawn shop

Similar Products Used:   V-BRAKES.

Bike Setup:   GT triple triangle moly frame. Shimano STX crankset. Shimano Alivio front and rear derailleurs. Shimano EF50 trigger shifters and brake levers. Sram PG-830 chain. Mozo M30 front shock. ProMax mechanical front disc brakes. Promax v-brakes (rear).

Overall Rating:3
Value Rating:3
Submitted by Budman a Weekend Warrior from Lodi , California , Us.

Date Reviewed: June 28, 2010

Bottom Line:   
All you guys should use the ABS - Automatic Brake System Modulator - the BUDBRAKE and the Promax disc brakes and V brakes will work fine and is safer.Try it - You Like It !

Expand full review >>

Duration Product Used:   2 Years

Price Paid:    $50.00


Overall Rating:2
Value Rating:4
Submitted by toyord a Weekend Warrior from slc,ut, usa

Date Reviewed: September 17, 2009

Strengths:    decent entry level brakes
slow you down


Weaknesses:    rotors heat up to fast
hard to adjust
jitters when trying to lock it up
not good for fast xc
fades fast


Bottom Line:   
These brakes work ok if your gonna go riding around town or some small hills. Does not work good for fast descents, or steep trails. It like jitters when you try locking them up, kinda like abs brakes on a car, ha. would defenitley upgrade these breaks if your gonna do some serious riding.

Expand full review >>

Duration Product Used:   Less than 1 month

Price Paid:    $540.00

Purchased At:   came with bike set u

Similar Products Used:   avid bb5

Bike Setup:   08 diamond back recoil, with some upgrades.

Overall Rating:5
Value Rating:5
Submitted by traxxasmaxx33 a Weekend Warrior from Jacksonville, Florida, USA

Date Reviewed: September 16, 2009

Strengths:    low price, smooth, came pre-mounted, simple, works in all conditions

Weaknesses:    long break-in time, kind of heavy, hard to adjust, rotors warp easily, sometimes brakes are spongy

Bottom Line:   
Paid $ 430.00 all together brakes are ok but I've only had them for four days so they still need some braking in. They ok for the beginner or on a budget (like me) but if your up to the price, Avid's hydraulic juicy 3's or elixir 5' have way more power but require more maintenance. Great if your on a budget but might be a bad choice if your a serious cyclist you know racing or what not. Dont be fooled if the brakes dont stop well at first, they need to be broken-in for about a month or so.

Expand full review >>

Favorite Trail:   mandarin park

Duration Product Used:   Less than 1 month

Price Paid:    $430.00

Purchased At:   Trek Bicycles of Jac

Similar Products Used:   v-brakes, cantilever brakes

Bike Setup:   2009 trek 3900 disk

Overall Rating:3
Value Rating:4
Submitted by Jon130 a Cross Country Rider from Tacoma, WA

Date Reviewed: August 25, 2009

Strengths:    Competent entry-level disc brakes, decent stopping power.

Weaknesses:    A bit noisy, as are ALL disc brakes during the break-in period.

Bottom Line:   
I was skeptical of these brakes as they came on an entry-level GT Avalanche we bought for my girlfriend but I'm fairly impressed. They don't have quite the stopping power that my Hayes hydraulic discs do on my 4 Banger, but to be fair my bike is also 10 lbs lighter and the brakes are worn in. My opinion is that these are definitely a good value and superior to MOST V-Brakes for all-weather braking. We haven't had them long enough to really say how well they hold up over time or on serious trails. My guess is that, as these are generally sold with entry-level bikes, this will likely be where they need to be. As with anything on a bike, maintenance is the key to better performance. For a full set of disc brakes with a price under $100, I really can't complain.

Expand full review >>

Favorite Trail:   Banner Forest

Duration Product Used:   Less than 1 month

Purchased At:   Performance Bike

Similar Products Used:   Hayes Hydraulic Discs, V-Brakes, Cantilever Brakes

Bike Setup:   2009 GT Avalanche. Brakes came pre-installed.

Overall Rating:5
Value Rating:5
Submitted by Allen Gilliam a Weekend Warrior from Winter Park, Florida, USA

Date Reviewed: May 2, 2009

Strengths:    Reasonable cost. Much stronger braking than rim brakes. They look cool.

Weaknesses:    None I know of.

Bottom Line:   
I'm very happy with the ProMax mechanical disc brakes on my new mountain bike. They're entry-level, so I feared they might be no better than rim brakes, but they're great. I weigh 275 pounds and, even before breaking them in, I can lock the back wheel and skid to a stop sideways on dry pavement. That put a smile on my face! I haven't been able to do that since I was a kid. I certainly couldn't do that with my old cantilevered rim brakes. Other than safety and cool stops, being able to skid the back wheel allows me to skid around sharp turns. Fun!

They do have to be adjusted properly to get full stopping power, but that's easy to do, unless you consider an Allen wrench to be a baffling high-tech gizmo. And when adjusted properly they do not rub the disc all the time as some have erroneously written. There's no contact at all.

Adjustment is really just common sense: Loosen the caliper mounting bolts. Adjust both pads toward the disc an equal amount until they're both touching the disc, squeeze the brake lever to align the caliper body, and then tighten the mounting bolts. This centers the caliper body on the disc and gets the pads parallel with the disc. Then simply adjust both pads out so they're as close as possible to the disc without rubbing, which can be easily heard when you spin the wheel.

The caliper body has a tiny Allen wrench screw on the side that locks the inner pad adjustment. It needs to be loosened before adjusting the inner pad.

If you're heavy, regularly ride in wet or muddy conditions, or need to brake for long periods of time in the mountains, these brakes are certainly worth the extra cost.

Expand full review >>

Duration Product Used:   Less than 1 month

Purchased At:   Performance Bike

Similar Products Used:   Cantilevered rim brakes.


Overall Rating:5
Value Rating:5
Submitted by Scuds03 a Weekend Warrior from Garden Grove, CA, USA

Date Reviewed: March 18, 2009

Strengths:    Outclasses V-brake stopping power by far. Especially when wet. One allen wrench and your fingers turning a knob to setup/adjust (Don't know why others have problems its so simple). I ride my DH bike to and from work which takes me down a 55-60 mph hill everyday and I have full confidence these will stop me QUICK. 3 months of that hill now 2x a day 5 days a week and they stop great with no noise or rubbing. Replacement pads are super cheap.

Weaknesses:    If I had to name the weakest link it would be the cables stretch over time which as cyclist I can accept. Beats the hell out of hydro brakes and the headachs that accompany them.

Bottom Line:   
I love everything about these brakes. Power, reliability, good looks, and great price... If you have problems with them its cuz you most likely didnt adjust them correctly. If youre having trouble take your bike to a local bike shop and have them tune them in for you before you throw dirt, you'll be impressed! Just because they are economical does not always mean they are junk!

Expand full review >>

Duration Product Used:   3 months

Purchased At:   Came with bike

Similar Products Used:   V-brakes

Bike Setup:   Average Dh bike which doubles as a commuter / trail chewer.

Overall Rating:5
Value Rating:4
Submitted by nokipete a Weekend Warrior from bournemouth uk

Date Reviewed: November 29, 2008

Strengths:    damn good brakes.dont try stoppies with too much wait in a back pack.i did, 1st week in august, now going for phyiso on shoulder. DOH!

Weaknesses:    cant stop it from squeeking at low speeds, like car brakes.

Bottom Line:   
cant think of much.only that getting fed up with flat rear tyres,nothing to do with brakes,must lose some weight that might help. lol

Expand full review >>

Duration Product Used:   1 Year

Purchased At:   bought on the bike..

Similar Products Used:   only v brakes no good in the wet!!

Bike Setup:   front and rear discs,front suspension.

Overall Rating:4
Value Rating:4
Submitted by Mike Jackson from Cedar Park

Date Reviewed: February 24, 2008

Strengths:    Havn't ridden yet. can say that judging from how they worked on a friends fr bike they did a good job of doing thier job.

Weaknesses:    me, learn to set up right.

Bottom Line:   
For those that are buying parts from wal-mart, the above gentlman said it best. Wal-mart guys slam and show bike monkeys. First Always have a bike tech do a t5une on your bike when its new to get out the grimlins. Second ride a new bike with some respect to learn how and what it does well and doesn't do well, as with add ons. Above all reaserch before buying to see if it fits your type of riding.I see too many riders or novice complain about parts.Enjoy the ride and maintain your bikes..

Expand full review >>

Favorite Trail:   any & then some

Duration Product Used:   Tested or demo'ed only

Price Paid:    $2000.00

Purchased At:   from friend

Similar Products Used:   Avid v-brakes

Bike Setup:   Set up old school Giant DS3 X-vert T fork Friend had sitting in garage for 4 yrs. Race Face Prodogy cranks disc going on it Maxxis 2.35 ignighters w/ Stan's. nuke proof hubs w/ bontregar asym rims Race Face B.B. isis drive

Overall Rating:4
Value Rating:5
Submitted by Barry Leigh a Weekend Warrior from South Orange

Date Reviewed: August 10, 2007

Strengths:    Inexpensive, reliable and replacement pads easily available.

Weaknesses:    Available only for I.S. 51 forks, although I belive this has been addressed by more recent Promax models, especially those with fork adapters.

Bottom Line:   
I have recently returned to cycling for the exercise and better health. Mostly I ride paved paths and the street, so the Promax disc brakes work well for me. As a bonus, Avid BB5 pads fit the Promax brake caliper, as do KoolStop and Jagwire pads. So you'll never be at a loss for affordable replacements (as compared to Hayes or Shimano).

Expand full review >>

Favorite Trail:   Liberty State Park

Duration Product Used:   6 months

Price Paid:    $1000.00

Purchased At:   Stock part on bike, 2006.

Similar Products Used:   First-time Disc Brake user

Bike Setup:   Completely upgraded discount/no name MTB. A so-called "branded" or "licensed" bike (using the name of a famous company that does not manufacture bikes, hah). Bought it because of the fine aluminum frame which fit me to a tee and because of the disc brakes, which in actually cost nearly as much as the bike if I had purchased them on the aftermarket. Replaced the stock discount store components with the real stuff; Deore hubs, Shimano/Ryno rims, Cane Creek and Aluminlite, Rock Shox Dart 2. All purchased at a significant discount.

Overall Rating:2
Value Rating:3
Submitted by Ben a Weekend Warrior from concord, ma, usa

Date Reviewed: July 27, 2007

Strengths:    it stops you decently. goes well with avid levers. adjustment knob works well and is simple.

Weaknesses:    tons of contant adjustments, makes a really weird bubly noise in the front, sometimes squeaks, rubs occasionally, stock levers were horrible, fine adjustments are tedious and tricky, and both calipers are loose and i cant fix it

Bottom Line:   
they work if you want a cheap disc brake, for anything else, its not good.

Expand full review >>

Favorite Trail:   great glen, nh

Duration Product Used:   2 Years

Purchased At:   rei

Similar Products Used:   none yet

Bike Setup:   k2 attack 1.0 not much is stock any more. i have to get a new brake system because these brakes don't fit on my new marzocchi

Overall Rating:3
Value Rating:3
Submitted by m k a Weekend Warrior from Dallas, GA

Date Reviewed: June 28, 2007

Strengths:    great stopping power once broken in and adjusted properly. They stop on a dime even going down hill on dirt.

Weaknesses:    they need to be adjusted a lot.

Bottom Line:   
Great brakes for $!!!! and if you are on a budget. Thanks to previous posters for the hints on adjusting. If you follow the hints on adjusting the brakes they will work great. I did and they do.

Expand full review >>

Favorite Trail:   Blankets

Duration Product Used:   3 months

Purchased At:   on bike

Bike Setup:   k2 attack stock, so far.

Overall Rating:3
Value Rating:4
Submitted by Dave a Cross Country Rider from NY

Date Reviewed: April 21, 2007

Strengths:    Inexpensive, They do work! Great introductory to disk brakes, seeing a complete set is only $90. pads last a long time. Rain , snow, sand, mud, saplings, dust do not effect their braking power.

Weaknesses:    At times pesky to tune nice and tight. Only entry level. Week holding magnets.

Bottom Line:   
They aren’t no Hope/Shimano/Hayes/Avid/(insert top brand here). However they are not junk. They do better than V-brakes.

Joe Green has it right. You have to get down there and fiddle with them.

Here is my tuning guide I made over 2+ years with these brakes. Using this you should be able to get the perfect set up and have very good preformance
Skip 1-3 If you cable is already tight.

1. Set your cable tension knob on your brake leaver to its lowest setting.
2. Loosen the cable lock bolt on the brake arm so you can move the cable to take the slack out. Tighten it back up.
3. Slowly tighten your Cable tension knob on your brake leaver till the arm moves a hair, but only a hair. As soon as you move the brake leaver, the arm should move. If there is a delay keep tightening the tension knob.
By the way you have to have a good strait disk to do this right.
4. Down under the brake body there is a little red wheel. Turn this till there is only about a millimeter to half a millimeter between the disk and the Left pad.
5. On the inside of the brake, there is a big silver circle with a hex whole in it. This is the pad adjuster that many people don't know about. Now take a hex key and turn it clock wise till the RIGHT break pad is about a millimeter to half a millimeter from the disk.

Now you should be done. Careful your brakes should now be tight, and powerful.

Expand full review >>

Favorite Trail:   Bad weather.

Duration Product Used:   2 Years

Price Paid:    $90.00

Purchased At:   Bike shop

Similar Products Used:   Avid BB5 Mechanical Disk Brake, Hayes HFX Mag XC, and many V-brakes


Overall Rating:1
Value Rating:1
Submitted by mike a Weekend Warrior from Victoria, BC, Canada

Date Reviewed: February 19, 2007

Strengths:    looks good

Weaknesses:    poor stoping power

Bottom Line:   
i just got this bike and it came with these brakes and all i have to say is give your self about 7 feet befor you have to stop to start braking, this is my first time using disk brakes and im disapointer, i have to say they suck

Expand full review >>

Favorite Trail:   off road

Duration Product Used:   Less than 1 month

Similar Products Used:   v brakes

Bike Setup:   iron hores outlaw 3.3 hardass bomber forks

Reviews 1 - 15 (42 Reviews Total) | Next 15

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