SRAM +40P Post mount to Post Mount Disc Brake Adapter

SRAM +40P Post Mount to Post Mount Disc Brake Adapter

The SRAM +40P Post Mount to Post Mount Disc Brake Adapter is a precision-engineered, high-strength aluminum spacer designed to safely upsize your bike's stopping power. If you are experiencing brake fade on aggressive descents and need to swap out your existing rotors for a larger diameter, this adapter provides the exact 40mm structural offset required. By shifting your Post Mount (PM) brake caliper upward and outward, it ensures your brake pads establish completely flat, mechanically optimal contact across the wider braking track of larger rotors.

Key Advantages

• Stiff, Flex-Free Power Transfer: CNC-machined from a premium, solid block of high-grade aluminum. Its highly rigid structure eliminates flexing under heavy brake load, maintaining a firm lever feel and preventing caliper twist or vibration.

• Complete Stainless Hardware Pack: Arrives out of the box complete with two high-tensile stainless steel mounting bolts and precision washers. The premium thread-coating resists corrosion and prevents bolts from backing out over rough trails.

• Universal 74mm Post Caliper Fit: Tailored with standard 74mm spacing to natively mount all modern SRAM and Avid Post Mount hydraulic disc brake calipers, ensuring a quick, drop-in garage upgrade.

• Streamlined Dual-Application Design: Fully optimized to serve as a high-clearance front fork spacing element or a rear frame extension depending on your baseline mounting spec.

• Flawless Pad Alignment: Correctly maps out the necessary B-angle height, centering the caliper perfectly above the rotor to prevent uneven brake pad wear, rotor rubbing, or high-pitched howling.

Technical Specifications

• Model Designation: Spacer Bracket — 40 P

• SRAM / Avid Part Number (MPN): 00.5318.007.003

• Mounting Configuration: Post Mount (PM) Frame/Fork to Post Mount (PM) Caliper

• Physical Height Offset: +40 mm

• Adapter Material: High-Strength Solid Aluminum

• Hardware Inclusions: Stainless Steel M6 caliper bolts with flat and lock washers

• Product Weight: Approx. 80g (including mounting bolts)

• Color: Sleek Matte Black anodized finish

Compatibility & Rotor Upsize Sizing Matrix

To hit a target rotor size, your frame or fork's native (minimum) post mount size dictates where this +40P adapter can be used:

• Front Fork Configurations:

  • Fits a 200 mm front rotor if your suspension fork features a native 160 mm (6" PM) baseline mount.

  • Fits a 220 mm front rotor if your heavy-duty enduro/DH fork features a native 180 mm (7" PM) baseline mount.

• Rear Frame Configurations:

  • Fits a 180 mm rear rotor if your frame features a tight, native 140 mm baseline mount.

  • Fits a 200 mm rear rotor if your frame features a standard 160 mm (6" PM) baseline mount.

• Brake Line Compatibility: Works seamlessly alongside all generations of SRAM Code, Level, Guide, G2, DB8, Maven, and legacy Avid Elixir/Juicy Post Mount hydraulic disc brakes.

Sram Disc Brake Caliper Mounting Specifications - Road & MTB

SRAM Warranty

All product warranties are in accordance with the manufacturer's policy (see link in the product details above). In most cases, this is a limited warranty that applies only to the original owner and excludes normal wear and tear, accidental damage, negligence (failure to clean/maintain the product), and improper installation (see User Manual link in the product details above). However, if you experience a problem with the product you purchased from bicyquel _ (original invoice required), please let us know so we can assist you with the appropriate procedure.