Formula Disc Brake Disc Brake System

Formula Disc Brakes

User Reviews (117)

Showing 1-10 of 117  
Ray   Weekend Warrior [Jul 31, 2011]
Strength:

NO Maintenance, parts replacement kits available online, build quality inside the brake looks good, not difficult to rebuild yourself.

Weakness:

none that I experienced nor that I could see in the internal mechanics.

This review is for the 4-Racing XC model. Maybe I had good luck but after 7 years without any problems at all, I decided maybe they could use a some tender loving care from the pro's at the lbs. That was only partly successful. I realized later that they had lost the bleed ORs and that made it impossible to repair. They told me it was cheaper to buy some new brakes. I am pretty mechanically minded so decided to try a rebuild myself as I didn't have much to lose. First I disassembled the brakes using the exploded views to see if it was salvagable. The most difficult was to get all 4 pistons blown out. As soon as one blows out you lose pressure. I used a spring clamp to hold back the ones that blowout easiest. And after some fiddling I managed to get them out using a foot pump with 100psi and a nozzel held in the pressure ports. Then ordered the full OR & the MC pump kits from Formula Itay. Replacing the MC pump and all the OR seals easy. Besure to replace all Orings. It only goes together one way so there's no way to install things backwards. Get and read the bleed instructions it works easy if you do it the way Formula tells you. Buy the bleed kit syringes. Also remember to torque to spec.

OVERALL
RATING
5
VALUE
RATING
5
rod farquhar   Cross Country Rider [Aug 31, 2003]
Strength:

formula b4 dh are pretty that is about all the good i can say about them

Weakness:

formula b 4 brakes did not work as well as i was told they would . i could see calipers expanding when appling pressure they squealed from day one and only stopped when warm or hot i found them under powered i contacted khs and they allowed me to return the set of brakes i promptly went out and purchased hfx mag hayes 8 inch and was never so happy after about 5 or 6 actuations i could perform one finger front wheel stands cold and no squeal and vast amounts of reserve power

please do not waste you're time or moner on formula brakes i wasted one month and over a hundred dollars on shipping

Similar Products Used: hayey hfx mag 8 inch
OVERALL
RATING
1
VALUE
RATING
3
rod farquhar   Cross Country Rider [Aug 31, 2003]
Strength:

formula b4 dh are pretty that is about all the good i can say about them

Weakness:

formula b 4 brakes did not work as well as i was told they would . i could see calipers expanding when appling pressure they squealed from day one and only stopped when warm or hot i found them under powered i contacted khs and they allowed me to return the set of brakes i promptly went out and purchased hfx mag hayes 8 inch and was never so happy after about 5 or 6 actuations i could perform one finger front wheel stands cold and no squeal and vast amounts of reserve power

please do not waste you're time or moner on formula brakes i wasted one month and over a hundred dollars on shipping

Similar Products Used: hayey hfx mag 8 inch
OVERALL
RATING
1
VALUE
RATING
3
allen abriel   Weekend Warrior [Dec 09, 2001]
Strength:

No Fade, Great feel

Weakness:

Lack of owners manual on product supplied with bike. Pad availibility

No mechanical problems at all yet. Ride at temperatures from 30F to 90F without any adjustments needed. Noise minimal when dirty. Just cleaning rotors stops squeal.Can't speak for reliability, except no problems at all for six months. When trouble develops will probably just replace with a more widely known name, for parts and repairs. Concept of disc brakes is great. Hopefully won't have to worry about replacement of expensive wheels due to rim wear, like with conventional V pads. Also stopping ability much better than prior V's used.

Similar Products Used: V-brake XT
OVERALL
RATING
4
VALUE
RATING
5
sean   Weekend Warrior [Jan 27, 2002]
Strength:

great, stop fast and are extremly realiable.

Weakness:

I have encountered none, and most likly will never encounter any problems ever.

Great, I think that they beat hayes with no problem. If you have a chance to buy these, but them!! They are great for all round bike setups, full suspension to hardtail. I am going buy another set for my hardtail today! Did I meantion that these are great brakes?

Similar Products Used: hayes, avid, magua
OVERALL
RATING
5
VALUE
RATING
5
YaMon   Weekend Warrior [Nov 07, 2002]
Strength:

Light...

Weakness:

No product support. Weak levers.

Stay the hell away from these if you do not have IS Standard Frame or you ride a Marzocchi Z1. Formula does not make a lot of adapters. make sure you have the adapter in your hand and KNOW for a fact it fits before you buy this. I still cannot imagine why they would make an adapter for the B4 and not the 4 Racing to fit the Zokes Z1 ?? I had to build my own rear adapter so that it fit my frame. Thank goodness I own a wrought iron furniture business and have the tools and materials at my disposal.

Similar Products Used: Magura
OVERALL
RATING
1
VALUE
RATING
1
Michael   Weekend Warrior [Sep 08, 2001]
Strength:

Powerful Braking...if you can actually pick up enough speed to require braking.

Weakness:

1) Design does not allow for the dissipation of heat.
2) Rotors overheat and warp easily.
3) DOT 4 fluid system does not work well with the poor heat distribution.
4) Free-running drag is out of control.
5) Brake lock-up is eminent on 20-plus mile bike rides.
6) High maintenance.
7) Bleeding the brake system is a pain without the Formula Bleeding Kit.

I've had my GT Zaskar for 16 months. The bike is great, but the Formula EVO's have taken the joy out of riding. The brakes have been bled, re-bled and bled again. How many times do I have to bleed these brakes before I get them to work properly???

These brakes are probably great race brakes...race, repair, test then race again, but they are not practical for daily/weekend use. There is just too much maintenance involved.

The brakes overheat very easily causing the DOT 4 brake fliud to expand, which eventually causes the disk brakes to lockup. This overheating can also cause the rotor to warp. If you have EVO disk brakes and you feel an increase in free-running drag, stop riding immediately!!! If you hear a squeaking/squealing/screeching noise that was not there when you started on your bike ride...too late, chances are your brakes have overheated to the point where you have just caused damage to your rotor.$$

I learned this the hard way.

The solution: If you don't ride in conditions which require extreme stopping power(downhill, mud or wet trail conditions) stick to v-brakes. You will be better off from the maintenance, monetary and overall bike riding experience perspectives.

Similar Products Used: First experience with hydraulic disk brakes
OVERALL
RATING
1
VALUE
RATING
1
Chris   Weekend Warrior [Sep 25, 2001]

Came standard on GT i-drive. My last GT came with the Formula MD-1 cable disc - front-runner for worst bike component of all time. Maybe that design team died of shame, because B4s seem to be living up to their reviews. They work well, have a nice lever shape, modulation and feedback, good power that is getting better each ride (the pads seem slow wearing so it makes sense that they’re slow to bed in), and are mostly silent - some nose when wet - unlike Formula’s dentist-drill cable discs. The design appears to be good if a bit fragile in some areas as a result of efforts to save weight. So far the discs themselves seem relatively robust in crashes but can be tweaked back into alignment if necessary. Reasonably straight-forward to bleed with the bleed kit - contact Thorsten or Erika Schaette at ThorUSA (Thorsten@thorusa.com) for really excellent and prompt service, advice and spare parts - even to the other side of the world. My bleed screws are a sloppy fit when not locked down which allows air to get into the bleed process, but thread tape cured that. I had to make up shims to get the caliper centered over the disc for drag-free running but once done there’s no further adjustment.

OVERALL
RATING
5
VALUE
RATING
5
Chris   Weekend Warrior [Sep 25, 2001]

Came standard on GT i-drive. My last GT came with the Formula MD-1 cable disc - front-runner for worst bike component of all time. Maybe that design team died of shame, because B4s seem to be living up to their reviews. They work well, have a nice lever shape, modulation and feedback, good power that is getting better each ride (the pads seem slow wearing so it makes sense that they’re slow to bed in), and are mostly silent - some nose when wet - unlike Formula’s dentist-drill cable discs. The design appears to be good if a bit fragile in some areas as a result of efforts to save weight. So far the discs themselves seem relatively robust in crashes but can be tweaked back into alignment if necessary. Reasonably straight-forward to bleed with the bleed kit - contact Thorsten or Erika Schaette at ThorUSA (Thorsten@thorusa.com) for really excellent and prompt service, advice and spare parts - even to the other side of the world. My bleed screws are a sloppy fit when not locked down which allows air to get into the bleed process, but thread tape cured that. I had to make up shims to get the caliper centered over the disc for drag-free running but once done there’s no further adjustment.

OVERALL
RATING
5
VALUE
RATING
5
Chris   Weekend Warrior [Sep 25, 2001]

Came standard on GT i-drive. My last GT came with the Formula MD-1 cable disc - front-runner for worst bike component of all time. Maybe that design team died of shame, because B4s seem to be living up to their reviews. They work well, have a nice lever shape, modulation and feedback, good power that is getting better each ride (the pads seem slow wearing so it makes sense that they’re slow to bed in), and are mostly silent - some nose when wet - unlike Formula’s dentist-drill cable discs. The design appears to be good if a bit fragile in some areas as a result of efforts to save weight. So far the discs themselves seem relatively robust in crashes but can be tweaked back into alignment if necessary. Reasonably straight-forward to bleed with the bleed kit - contact Thorsten or Erika Schaette at ThorUSA (Thorsten@thorusa.com) for really excellent and prompt service, advice and spare parts - even to the other side of the world. My bleed screws are a sloppy fit when not locked down which allows air to get into the bleed process, but thread tape cured that. I had to make up shims to get the caliper centered over the disc for drag-free running but once done there’s no further adjustment.

OVERALL
RATING
5
VALUE
RATING
5
Showing 1-10 of 117  

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