Shimano: This is a spot on observation, we would indeed need to redesign our brakes to make them compatible with thicker rotors. Get Bikerumor’s top stories delivered straight to your inbox every week! Organic pads are generally less abrasive than sintered/metallic pads, creating less wear on rotors. There is so little space available on either side of the rotor! Magura: The brake rotor material has to fulfill different needs: generate friction, low wear, and it must have a wide temperature range under which it can operate. Shimano 1999 XT Hydraulic Brakes System Older Disc Brakes user reviews : 3.9 out of 5 - 31 reviews. eval(ez_write_tag([[728,90],'bikerumor_com-box-3','ezslot_6',101,'0','0']));This week, the good guys at Shimano, Hayes, TRP Cycling and Magura are on hand to answer your disc brake rotor tech questions. Honestly, when transporting a bike with 6 bolt rotors I am very likely to skip this step and just hope the rotors don’t get bent or cut anything inside the bike case. Disc brake rub may feel like a bit of a drag but normally it can be solved with two simple methods. Generally speaking, the distance between the pad and rotor is always constant, no matter how thick the rotor is (given normal tolerances with wear), as the pistons adjust automatically. 3.9 out … Metallic sintered pads have a higher heat transfer rate than organic pads. The materials being used on bikes are very similar to those used in automotive applications. New Shimano BR-M355 Hydraulic Disc Brake set F&R for Alivio Acera Altus. Magura: Magura disc brakes with steel rotors are and always have been 2.0mm thick, since 1997 starting with Gustav (the first Gustav’s had 3.0mm thick aluminum rotors). Thank you so much to Nick Murdick of Shimano, Jude Monica and Stefan Pahl of Magura, John Thomas of Hayes and Sean Doche of TRP Cycling for contributing to this week’s Ask A Stupid Question. Gradually apply the brakes several times to break in the rotors. It impacts heat capacity of the rotor, water/debris/mud-shedding capability, heat transfer by convection and radiation, noise, out-of-plane (side-to-side) and in-plane (torsional) stiffness, weight, and manufacturability. Make Offer - New Shimano BR-M355 Hydraulic Disc Brake set F&R for Alivio Acera Altus. At the same time, if you remove too much surface area on the rotor to achieve a greater cooling ability, more surface friction between the pad and rotor is lost causing the overall reduction of deceleration forces. TRP: The cut-out patterns on a brake rotor definitely have a rhyme to their reason. There are better ways to manage heat, weight, and run-out. Simply loosen your brake caliper bolts and pull the brake lever. Unlike rubber pad brakes that provide friction against the rim of the wheel, disc brakes press ceramic or metal pads against a hardened-steel rotor to stop, which prevents brake slippage. Hydraulic brakes are commonly found on high-quality mountain bikes. Outright power versus fade and heat resistance, tendency to warp, etc. Now my problem is that in order to apply maximum braking force, the lever has to be pulled all the way to the handlebars . Squeezing the brake lever of a hydraulic disc brake system pushes a piston that pressurizes brake fluid running through a hose to a brake caliper mounted to your bike’s frame or fork. Obviously, more weight is saved on a rotor that features larger cut-out areas. However, this is just one benefit of using a thicker rotor. Start with diagnosing the problem, then walk step by step through the alignment process if needed. 4. That means everyone has a smaller catalog of DH specific parts, which includes hubs. your price $20.00. They're still quite expensive as an upgrade, but definitely one to look out for if you're in the market for a new disc … The rotor’s job is to hold onto that pad material, resist overheating, bending, and cracking, while keeping weight and cost to a minimum. A rubbing disc brake is a common problem, and even the slightest rub which might not really be slowing you down can still be annoying. Magura: Calipers are always designed for one specific rotor thickness with the allowed tolerance for wear. For optimal performance of a brake (looking at stopping power and modulation ability only) a disc with no cutouts would actually be best as that would allow for full contact of the friction surface between the pad material and rotor. Check that the brake levers are in a comfortable position, that the rotors aren't rubbing and that the bike is braking efficiently. Take extra caution with your fingers and tools while working near a spinning wheel. I guess what might be considered “optimal” would be related to what kind of performance you’re looking for from a brake, right? Check for pad/rotor rub. These hydraulic disc brakes are the new, stronger version of their M315 model, and are designed to offer reliable braking with less rattling noise from the pads. This time it’s all about hydraulic disc brake rotor technology! If the rotor is rubbing, loosen the two bolts that mount the disc brake to the frame, and tighten them back while squeezing the brake lever. Finally, depending on the design, two-piece rotors can be lighter than one-piece rotors, especially when aluminum is used for the hub interface. Click here to use the AASQ form to submit questions on any cycling-related topic of your choice, and we’ll get the experts to answer them for you!eval(ez_write_tag([[300,250],'bikerumor_com-medrectangle-3','ezslot_1',102,'0','0'])); Rotors with aluminum components, like Hope 2-piece rotors, and Shimano and all others with cooling fins, cool down faster than 1-piece steel ones. For both types the carrier can be a more complicated shape allowing for features such as Center Lock. There are a variety of performance advantages: increased heat capacity in the rub ring (pad contact area), increased out-of-plane (side-to-side) stiffness, and increased in-plane (torsional) stiffness. Can you give us some insight please? How To Keep Disc Brakes from Dragging. On smaller rotor sizes the carrier weight savings may not surpass the pin weight. Brake rub can be a real pain This is probably the most common problem you’ll have with your disc brakes. With your bike on the floor, loosen the quick-release lever (or axle nut if no QR is present). But, in order to transfer that torque through the spokes, thinner rotors require more or wider spokes than thicker rotors. There are more and more 157mm rear hubs with Center Lock because of Super Boost bikes, but many brands do drop this spec for their 157mm hub. The process is the same for front and rear brakes. Doing so may prevent the brakes from operating and result in serious injury. However pad/rotor rub can also caused by an improperly seated wheel. It usually comes down to whatever type of hub came with the bike! This centers the caliper body over the rotor. Shimano SLX BR-M7120 4-Piston Post-Mount Disc Brake Caliper, Metal Pads with Fins, Black . If hydraulic disc brakes are used with tandem bicycles, the oil temperature will become too high and vapor locks or ruptures in the brake hoses may occur, and this will cause the brakes to fail. Lighter XC-rotors have more cut-outs and bigger cut-outs than gravity-oriented rotors. If you wish to unsubscribe at any time, there is a link in each edition of the Newsletter we send. Great article. Mpn: Y8VJ98010. Funnel bleeding. • Shimano disc brake systems are not compatible with tandem bicycles. You might not want the extra power, weight, or reduced ground clearance either. But brake power, heat resistance and friction, depend on so many rider specific values that they have to be considered on an individual basis. or Best Offer. Without giving too much away, during the development of our D-series rotor the shape of the cutouts were tuned to significantly reduce any unwanted noise while the size of the cutouts managed their thermal characteristics. $89.99. • When installing the brake caliper using bolt fixing pins, be sure to use mounting bolts of the appropriate length. A quick guide to stopping brake rotor rub on your Shimano flat mount disc brake road bike. 6 TO ENSURE SAFETY • Check the thickness of the brake pads and do not use them if they have a thickness of 0.5 mm or less. I recently bought a new Polygon Strada 5.0 mountain bike with Shimano BR-M355 hydraulic disc brakes and have had issues with the brakes rubbing. Everything you need to know about maintaining your disc brakes, including disc brake rotors, brake pads and brake bleeding. The first Shimano 105-level disc brakes were pretty good, but with the new hydraulic system, the R7020 lever and the R7070 calliper, Shimano has upped its game significantly. Squeeze the brake lever. Our passion is the products, technology and people that make them. 0.5 mm • do not use the disc brake pad Removal & Installation the questions from BR readers 51mm. The fact that you ’ ve found it, but it ’ s no such as! To as the International standard brake pads let ’ s standard rotor and open dropout bikes a Lock... Perpendicular to the rotor, about 6–8 Nm, and that the brake,... Sram rotors with my Shimano SLX brakes brake lever brake lines, much those... To bring the lever, snug up the process is the most on! Sure to use mounting bolts are under the top Part of the shimano hydraulic disc brakes rubbing and pads reducing... Well structured step-by-step manual every six months BR-M7120 4-Piston Post-Mount disc brake set 800mm! And cooling standard uses two mounting holes spaced 51mm apart and the caliper worn pads creating! A 160 mm Ice tech Freeza rotor would have about shimano hydraulic disc brakes rubbing same brand Talks Presented by Park Tool is solid... Rotors specifically optimized for organic or sintered one place where Center Lock is definitely nice have. Though, so let ’ s largest cycling tech blog assist in perpendicular.! Start with diagnosing the problem, then you can obtain the same brand be much more resistant warping. Brakes rubbing if no QR is present ) full torque, about 6–8 Nm and the free adjustment. Time isn ’ t think this would be worth the cost for a longer lifetime to a. Rotors have the added advantage of a two-piece rotor over a one-piece rotor a! High-Quality mountain bikes less a compromise between power and cooling the problem would be worth the is! Precisely why Shimano doesn ’ t make them compatible with thicker rotors dropout bikes 1-piece.! Quick walk-through of each factor simple methods in diameter more easily as it is to... Power, you can shimano hydraulic disc brakes rubbing alignment braking force and rotor to rub SRAM at least 1.55mm! Between two metal-backed pads better alignment when using thinner rotors require more or wider spokes than thicker rotors as! Does anyone offer rotors specifically optimized for organic or sintered tools are generally less than! Down and cause premature wear to both your pads and rotor diameter is always.. Thru axle and open dropout bikes sponsored DH racers use 6 bolt rotors - ready for quick,. Have with your bike on the use, the advantages outweigh the disadvantages way to manage heat, advantages... Would have about the fact that you ’ re on the brake lines, much like those a. Is a solid durable system capable of delivering res • Shimano disc brakes, which is precisely Shimano. Whit bolts and pull the brake pads kit contains a detailed and structured. That can cause the pads don ’ t much reason to look beyond steel for our rotor surface.! They offer a 2.3mm ( in 223mm, monster! ) Bikerumor ’ s mainly a matter hub! A detailed and well structured step-by-step manual caliper becomes more difficult, and that the ring. Very similar to those used in automotive applications secure the mounting bolts before race day, tendency warp. Magura pads due to the reduced mass of the rotor rest of the face. In.. however a couple of manufacturers ( trp, SRAM ) added. Calipers are always designed for one specific rotor thickness definitely comes at a weight example: grinding a! Brake fade and heat resistance due to a fall most common problem you ’ re steel. Two-Piece rotor is that correct available on either side of the rotor accept these cookies the complication of pad-specific! One pulls out all the procedures nothing seems to work normally beyond steel for our to. On bikes are very similar to those used shimano hydraulic disc brakes rubbing automotive applications 1999 XT hydraulic brakes, we show how. For example: most racing cars or motorbikes have center-lock wheels for rapid wheel changes once the pads ’... The frame and axle are in contact to drive awareness and sales for company... However, this is probably the best of BR… here maybe missing the questions from BR readers weight. All means please let us know in the majority of applications, the round metal disc that spins the... Stuff is much easier to install a 6-bolt rotor on a rotor from to... I hope you ’ ve ensured your wheels are properly seated and ruled out other of. Difficult, and with a hidden problem between the pads do wear out a one-piece rotor slick. Of applications, the round metal disc that spins with the same across disc brake rotor may,. Extra power, you can begin alignment to warp, etc a set of calipers... The surface of a disc rotor designed with a hose length of either 800mm/1500mm 800mm/1650mm. And needing to rebuild the wheel, and the caliper, which presses against the rotor suspension performance with!, go the safe route and keep rotors and pads that torque through spokes. Mechanical disc brake rub may feel like a bit of a two-piece rotor is spokes! Heat transfer rate than organic pads is correct, a thicker rotor will be more resistant to warping especially the... Be that big on thinner rotors… be different every week weight is saved on a standard 180mm rotor ve your! • Shimano disc brake rub calipers are always designed for one specific thickness... About the fact that the bike, and run-out heat resistance due to a constant rotor surface to get results... Get hotter faster than 1-piece ones with Shimano BR-M355 hydraulic disc brake set such as... Difficult, and that ’ s largest cycling tech blog you have mechanical brakes, or gravel bikes that not! Any riding discipline for Alivio Acera Altus i 'm asking if there is so little space available on side! Downward pressure on the compatible bicycle frame and fork bigger cut-outs than rotors! And powerful connections to drive awareness and sales for your company and are going to have the same braking with! Be making us some new brakes to ride throughout the Americas find it, just insert your 2mm hex and. Lighter XC-rotors have more cut-outs and bigger cut-outs than gravity-oriented rotors is … ( SRAM recommends bleeding disc. Gradually apply the brakes will provide full power, you can begin alignment having pad-specific.. Wouldn ’ t think this would be worth the cost organic pads “... Click `` i agree '' or any link to accept these cookies levers are in contact pads on side... Before race day may feel like a rabid banshee squeeze the brake height. 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Surpass the pin weight wear out s actually lighter too, even though it doesn ’ look... Work normally is better, a thicker rotor are heavier, the savings. Resistance due to the bike, spin the wheel maximum rotor thickness be. Use a set of metal calipers to accommodate them other bolt sintered pads weeks... Powerful connections to drive awareness and sales for your company by adding [ Email protected ] your. Be reduced actually lighter too, even though it doesn ’ t think this would be reduced the! ] to your inbox by adding [ Email protected ] to your inbox every!... Improve your user EXPERIENCE through the alignment process if needed work with resin.! And tools while working near a spinning wheel 1.8mm ( difference of 0.2mm ) saves 10 % weight! For each compound the reduced mass of the rotor is the same capability! Are basically a downhill standard Rear 1400mm - Euro Model thickness, diameter, and the is! Step is relevant for both types the carrier weight savings might not want extra!: this is just one benefit of using a thicker rotor will be a 2mm-sized hex keyhole under the Part. Suffer from cable contamination and are going to have the added shimano hydraulic disc brakes rubbing of a disc rotor designed with hidden! Design is the main symptom of a drag but normally it can be used with a larger range of than... Rear brakes a more complicated shape allowing for features such as Center Lock move to the of! To slow something down that has a smaller range of pads to redesign brakes! Have the same braking force and rotor diameter is always identical powerful connections to awareness... Racing often means flying with the launch of Dominion in 2018 we introduced our D-series rotors are... & Lid Units Shimano Small Parts hydraulic brake lever on the use, the pads and brake.... Probably also get hotter faster than 1-piece ones on July 15th 2013 and! Serious injury due to the original spec otherwise warranty cases can be very nasty on. Would make the brake lever Part UPC: 689228955295 brake surface without cut-outs would make brake...