Often asked: What Size Are The Bolts Used For Mountain Bike Disc Brakes?

What size are MTB brake bolts?

The closest length you’ll get is 20mm, though some places may have 18mm M6 socket heads in stock. They’ll also have 30 and 40mm lengths typically.

What size are bike brake bolts?

These bolts are 6mm in diameter (M6) which is the correct size for virtually all bike posts or studs. The length is 20mm (approx. 3/4”+) which will provide excellent retention of your brakes. The heads are the “Socket Button Head” which are very attractive fasteners that can be installed without any special tools.

What size are disk rotor bolts?

m5*10mm is fairly usual for rotor bolts. But you want steel or titanium.

What size are brake caliper bolts?

The caliper bracket bolts are 18 mm. Be prepared to put some serious torque on the bolts to remove them.

What size are Shimano brake bolts?

The Shimano adapter bolt fits most Shimano post mount brake calipers or brake adapters that use a snap or stop ring. The only exceptions are XTR disc brakes and the Road model BR-RS785. The bolt has an M6 thread of 18.7 mm length.

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Are all bike rotors the same size?

SRAM’s HS1 disc brake rotors are available in five diameters: 140,160,170,180, and 200mm. Shimano, and most other brake companies, offers rotors in four sizes, which can still be a lot to choose from. They do a better job of displacing heat generated from braking, and can provide better modulation.

What is the torque spec for caliper bolts?

The caliper bolts have a torque spec of 44 ft/lbs and 23 ft/lbs in the rear.

How many MM is a M6 bolt?

You can identify an M6 screw by measuring the diameter with a ruler. It’ll be 6 mm, or slightly more than 7/32 inches (0.228″).

What is M6 screw?

M6 refers to a metric 6mm screw. The outside diameter of the threads is 6mm. The number “1mm” refers to 1 threads per millimeter. M6 screws are commonly used by HP. You can identify an M6 screw by measuring the diameter with a ruler at slightly more than 7/32″ (0.228″).

Do you need rotor retaining screws?

No need to replace those screw(s). They are only there to keep the rotor in place during assembly so that in won’t fall off until you have the wheel in place and tightened which is what actually holds the rotor.

What is an M5 screw?

In the case of a metric thread, the bolt is named in accordance with its outer diameter e.g a bolt with a 5 mm outer diameter is known as an M5 bolt. The “Pitch” of the tread is another important feature of a thread. The pitch is defined as the interval (distance) between adjoining threads.

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Are caliper bolts universal?

Step 5: Use the recommended torque pressure to tighten the brake caliper bolts. Since all brake calipers are unique to each manufacturer, and often made from different materials, there is no universal torque pressure setting for brake calipers.

What is a brake caliper guide pin?

The brake caliper guide pins are two round metal pins on each brake caliper where the brake piston assembly sits. They’re called guide pins because they’re responsible for guiding the proper angle for how the brake pad meets the disc. If the caliper is not free to move, the culprit might be bent or binding guide pins.

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