Disc rotor to hub 18–35 (M5 bolts) 350 (M965 rotor locking) Hayes® 50 Avid® 55 Magura® 34 Caliper mount 53–69 Avid® 80–90 Magura® 51 Hydraulic hose fittings 44–60 It will do either rotor size… Disc Bicycle Brakes: What is the Ideal Rotor Size? The frame I will be building on Will either be a tout terrain grande route from Peter white cycles or a Gunnar grande disc. It’s particularly confusing if you’re a rider who uses one bike for more than one of the cookie-cutter descriptions we use to divvy up our sport. It’s certainly better to be ‘overbraked’ than under. “When brake caliper pistons are applied to larger rotors, due to the fact that they are further away from the rotating axle, they provide greater leverage and torque to stop the rotation,” he said. 160 mm 6-Bolt. They’re more exposed to trail hazards than smaller diameter rotors. The entire post can be viewed by clicking HERE. The mount type for the disc brake calliper is Post Mount (which should be 74 mm spacing between the mounts, center-to-center), which is the most common standard for mountain bikes. Menna added that bigger rotors also have a larger braking surface to dissipate heat, “The better you manage heat, the more consistent the brakes work under various loads.”. This all-mountain, 650b Norco Sight has 180mm front and 160mm rear brake rotors. Disc brakes can be hydraulic or cable driven. This disc rotor is available in different sizes like 160mm, 180, and 203mm. Brake Rotor Size Chart Hoskin. For years, running rotors that measured 200 or 203mm in diameter was the norm for downhill bikes, while 160-180mm was the typical trail bike rotor size. Take into account the style of riding you do the most before deciding which mountain bike disc brake to buy based on the rotor size. Brake lever: drop bar type (including STI and Ergo types) 53–69 Campagnolo® 88 Mavic® 62–80 Disc Brake Systems Component Shimano® in-lb. Wheel size and rotor diameter are related. I want to upgrade to a 180mm front rotor. 159 Part No. The BRAKE Report is an online media platform dedicated to the automotive and commercial vehicle brake segments. FEATURES EXPLAINED CALIPER. How to buy MTB rotors: size. Given that evidence, it would be reasonable to assume that the case for a pair of 160mm rotors would be cut and dried, but a mixed setup – with 160mm at the front and 140mm at the rear – is just as popular. Disc brakes are no longer the braking system of the future – they are the braking system of the present. 1. 160mm 180mm 203mm Disc Brake Rotor with 6 Bolts Stainless Steel Bicycle Rotors Fit for Road Bike, Mountain Bike, MTB, BMX (Stainless Steel, 2pcs) 4.6 out of 5 stars 667 # 1 Best Seller in Bike Brake … Do I need to change any components besides the disc itself and an adapter for the caliper? The rule of thumb for determining diameter size and performance is that for every 20mm increment in size you gain up to a 15% increase in braking power. Related post:Bicycle Brake superiority: Disc or Rim in Tour de France. thanks, Chris Or do you have a 5in trail bike that you occasionally race? Risk: Continued operation at or below Rotor Minimum Thickness can lead to Brake system failure. I’ve read online that it might be a good idea to run larger rotors with bigger wheels. For example, flat-mount, where the brake caliper sits directly on a chainstay or fork blade, as opposed to post mount, has been universally adopted. However, there is an area where a certain amount of debate still exists, and that is around the size of disc rotors. Be sure of the type of bicycle you want: Mountain bike, city bike or road bike. Disc Brake Caliper Mounting Bracket and Spacer Configurations Use the chart below to identify the parts you intend to use, then reference the chart on the reverse side to determine the correct bracket and/or spacers. Disc brakes are made of a metal disc attached to the wheel hub. The disc braking system includes a caliper that squeezes the brake pads against the wheel, causing the tire to stop rotating. What do you think? Bicycle Disc Brake Rotor Size Chart. Free shipping. With those options a rider can drag their brakes all the way down the Stelvio and not suffer any dip in performance.”, Sram’s road product manager, Brad Menna, agreed, “We recommend 160mm for road applications. Their more consistent performance was a natural fit on rough roads in often changeable weather conditions. Weight is not such an issue with aero bikes, and disc brakes opened opportunities for aerodynamic development. Rotors come in 140mm, 160mm 180mm and 203mm sizes, and depending on the category of bike you're riding, it will be set up for a different size disc — the front rotor will usually be a size up from the rear. Likewise, if you’re a climber, the additional grams saved by running smaller rotors might be worth it. Rotor rings feature 48 directional internal curved vanes for improved rotor coolin Friction rings are cast from high carbon G3500 alloy giving excellent wear properties and improved thermal capacity. By entering your details, you are agreeing to BikeRadar terms and conditions and privacy policy. • Shimano disc brake systems are not compatible with tandem bicycles. Then aero race bikes got them, which again made sense. Thanks to an additional rigid element above the 6-hole mounting, the Magura MDR-C disc rotor is an ideal all-rounder - … Get the front version of this adapter. Make Offer - New Shimano SLX Deore SM-RT66 Bicycle MTB Bike 6-Bolt Disc Brake Rotor - 160mm *PAIR* Shimano SLX Deore SM-RT66 Disc Brake 160mm 6-bolt Rotors, Made In Japan. Measure the brake rotor thickness 0.40 inches (10mm) inside the outer circumference of the brake rotor every 45° ( 1 / 8 of a rotation). Measure the height from the ground to your crotch. Cable Disc Brakes,as the name implies work with a cable attached to the brake lever on the handle bars. O/D ThMin Th Height Front Bore Rear Bore Fixing Holes Location Holes Holes PCD BRAKE DISC SIZE CHART KBD 001 Alfa Romeo, Fiat, Lancia F S 240.00 11.00 9.20 39.50 59.00 124.00 4.00 2.00 98.00 KBD 003 Ford, Westfield F S 240.00 10.00 9.00 58.00 64.00 136.00 4.00 1.00 108.00 KBD 004 Vauxhall F S 236.00 12.70 11.50 41.00 60.00 120.00 4.00 3.00 100.00 KBD 005 Vauxhall F S 236.00 … While several factors enter the mix when it comes to design decisions that account for the current discrepancies, most importantly calls are made based on safety. TBR Drive Rotors come as small as 140 millimeters in diameter for road and cyclocross applications, all the way up to 205mm for downhill mountain biking. I'm thinking 160 on the front and 140 on the rear? Larger wheels benefit from larger rotors, as do mountain bikes designed for aggressive riding. Rotor diameter plays a critical role in helping you getting the most out of your brakes, The 150mm-travel Enduro 29 has 200mm front and 180mm rear rotors to bring it to a halt, This 650b Norco Sight has 180mm front and 160mm rear brake rotors, a common setup for trail and all-mountain bikes, Ten tips to stay motivated through winter, Trail Tech: Mountain bike tire pressure – all you need to know. Braking forces generate heat on the rotor and in the disc brake pads - a larger rotor helps dissipate heat more effectively and this preserves your brake pads and improves performance. If your trails lack extended descents and have only minor changes in elevation then step away from the 200mm pie plate and opt for a smaller, lighter rotor. Lighter riders and weight weenies might opt to run a 140mm rear rotor for XC racing. Should I replace my 160mm rotors with larger ones? Reputation: Join Date Feb 2005 Posts 689. Yet now even lightweight race bikes have them. You can’t have a discussion about proper rotor size without knowing what type of bike you’re talking about. They rely on a disc rotor which is attached to the hub. This allows the brake to dissipate heat much more effectively. But, please, do your family a favor and run all six bolts. This is the business end of the braking system. If so, how large should I go? Rotor size is limited currently to 160mm. They do a better job of displacing heat generated from braking, and can provide better modulation. Here are some general rules of thumb: 160mm rotors for cross-country (possibly with a 180mm front rotor for heavier riders and greater versatility); 180mm front and 160mm rear rotors for 5in and 6in full suspension bikes; 200mm rotors for gravity riding. $35.00. That’s what provides the most power and best system performance for the widest range of riders and uses.”. SRAM’s HS1 disc brake rotors are available in five diameters: 140,160,170,180, and 200mm. There are two upgrade SIZE options with these oversize bicycle brake disc conversion kits – 160/165mm-180mm (medium power upgrade) and 160/165mm 203mm (mega power upgrade) and the option of full circle profile or new lightweight contoured profile.These mount on most standard 6 bolt wheel hubs and together with the bracket provided, which again fits most 50mm centre forks, your … Consult your retailer for the proper rotor sizes for your bicycle. Anyway the ones that are on my bikes are all M5... 11-21-2005 #3. applegreenheckler. If you have a front flat mount brake, it will use a 140mm or 160mm rotor, only. Special brake pads, held in place by the braking mechanism, squeeze the rotor causing the wheel to slow down. What size rotors do you guys use in your disc touring rigs? Shimano’s Ben Hillsdon also agrees and explains why 160mm rotors might be better able to cope in certain situations. Our mission is to provide the global brake community with the latest news & headlines from around the industry. How to select the right rotor diameter for your mountain bike. Disc rotor size chart boskin ebc replacement mtb discs mountain bike forums mtbr never tell you about disc brakes. Go straight to 220 mm and the increase is 24%. Other in-lb. Question: I’m building up a 29er hardtail and am swapping components over from my old 26in frame. If you’re pushing 90kg (200lb) you might want to consider larger rotors, depending on how you answer the next three questions. Written by Kupis on March 12, 2020 in Chart. As the rotor reaches its minimum thickness, the braking distance increases, sometimes up to 4 meters. Commercial Vehicle. Many hardtail frames lack the seat- and chainstay clearance for rotors larger than 160mm. Disc Brake Rotor Minimum Thickness (also known as Scrap Thickness) is the minimum safe working thickness of a rotor at which it must be replaced. 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