FSA Alloy NBD Bolt Assembly
Alloy NBD Bolt Assembly
FSA

FSA Alloy NBD Bolt Assembly

$18.00
In Stock

OEM replacement alloy QR-18 self-extracting bolt for FSA 19mm NBD (no pinch bolt) cranks. Black anodized finish, lightweight and engineered for exact fit and easy removal.

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Product Details

Overview & Technology

FSA Alloy NBD Bolt Assembly (Part #390-2002) is a purpose-built replacement crank arm bolt designed for 19mm spindle NBD cranks. Constructed from high-strength alloy and finished in black anodize, this bolt replicates OEM dimensions and function for a secure, low-profile crank attachment. The available QR-18 self-extracting variant integrates a built-in extraction collar so the bolt doubles as its own crank puller during removal. That design saves tools on the trail and prevents damage to the crank preload system during service.

Key Features & Construction

Material and finish: precision-machined aluminum alloy with black anodized coating for corrosion resistance and reduced weight. The alloy construction balances strength and lightness while resisting galling on the spindle interface. Self-extracting QR-18 option: includes a self-extracting collar that engages the crank arm during bolt removal, streamlining maintenance and preventing damage that can occur with aftermarket pullers. OEM dimensions ensure correct preload and alignment with 19mm NBD spindles.

Fit, Compatibility & Specifications

This bolt is specifically made for FSA 19mm NBD (no pinch bolt) alloy cranks and matches the OEM form, fit, and function. It is not compatible with cranks that use pinch-bolt interfaces, different spindle diameters, or non-FSA proprietary systems. Manufacturer part number: 390-2002. Forest Bikes product number: 350535. Shipping dimensions are 2" x 2" x 1" and the item weight is approximately 0.06 lb. Always confirm your crank uses a 19mm spindle and an NBD interface before ordering.

Who This Is For

Designed for road cyclists and mechanics who need an OEM-correct replacement bolt for FSA 19mm NBD cranksets. Ideal for riders maintaining older FSA cranks, fleet managers, and home mechanics who want a direct-fit part that preserves original crank performance. If you use an FSA alloy NBD crank and prefer the convenience of a self-extracting bolt for faster wheel changes and easier maintenance, the QR-18 variant is the practical choice.

Key Features

  • ✓ OEM-fit replacement for FSA 19mm NBD (no pinch bolt) cranks
  • ✓ Lightweight, high-strength aluminum alloy construction
  • ✓ Black anodized finish for corrosion and wear resistance
  • ✓ QR-18 self-extracting design for tool-free crank removal
  • ✓ Exact OEM dimensions to preserve crank preload and alignment
  • ✓ Compact 0.06 lb weight and low-profile head for clearance

Specifications

Misc Black

Product Identifiers

Vendor Item # 390-2002
UPC 400310069009

Frequently Asked Questions

Which cranks does this bolt fit?

This bolt is made specifically for FSA alloy NBD cranksets with a 19mm spindle and a no-pinch-bolt interface. It replicates OEM fit and function and is not compatible with pinch-bolt cranks or other spindle diameters.

What is the QR-18 self-extracting feature?

The QR-18 self-extracting design incorporates an extraction collar so the bolt doubles as its own crank puller. This makes removal faster and reduces the need for a separate crank puller tool, helping protect the crank's preload parts during service.

Is threadlocker required during installation?

FSA recommends following the crankset's installation instructions. In many cases, a small drop of medium-strength threadlocker is used for bolts subject to repeated loading, but always follow FSA's torque and assembly guidance for your specific crankmodel.

Does this bolt include washers or spacers?

This listing is for the alloy bolt assembly itself. Any washers, spacers, or dust caps required by your crankset are sold separately or remain part of your original crank hardware. Check your crank manual to confirm included parts.

Can I use this on other brands' cranksets?

Because spindle diameters and interface geometries can vary, we only recommend this bolt for FSA 19mm NBD cranks. Using it on non-FSA or mismatched systems can cause improper preload and potential damage.

How often should I replace crank bolts?

Bolts should be inspected regularly for corrosion, thread wear or deformation. Replace if you notice stripped threads, damaged heads, or if the self-extracting collar no longer functions smoothly. Routine inspection during major service intervals is recommended.

Buying Guide

When buying replacement crank bolts, prioritize exact OEM compatibility: spindle diameter, interface type (NBD vs. pinch-bolt), and crank manufacturer. Material and finish matter — aluminum alloy bolts offer a good strength-to-weight ratio and anodizing improves corrosion resistance, but always confirm thread condition and dimensions against your existing hardware. Consider a self-extracting variant like the QR-18 if you want faster maintenance and less tool clutter. Always follow the crankmaker's torque specs and installation steps to preserve bearing preload and crank longevity.

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