SRAM MTH 406 Freehub Body
SRAM

SRAM MTH 406 Freehub Body

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Genuine SRAM MTH 406 freehub body (11.2015.018.100 / HU-SPP-A0). Precision-machined OEM replacement offering long-lasting spline strength and reliable cassette engagement for SRAM mountain hubs.

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Product Details

Overview & Technology

Genuine SRAM replacement — the MTH 406 freehub body (Manufacturer Part #: 11.2015.018.100, SRAM Model ID: HU-SPP-A0) is an OEM service part designed to restore hub performance and cassette fitment on compatible SRAM mountain-bike hubs. It replaces worn or damaged freehub bodies to eliminate play, noise, and shifting inconsistencies. This freehub body is precision-machined from high-strength alloy with hardened steel spline surfaces at cassette contact points for improved wear resistance. The design focuses on torsional stiffness and light weight so you keep wheel acceleration and pedal feedback while maintaining long service life. Shipping dimensions are 12.4" x 9.1" x 4.6" and the package weight is approximately 2 lb.

Key Features & Benefits

Durable construction: The MTH 406 uses a machined alloy body with hardened spline interfaces where the cassette rides, reducing wear and maintaining secure cassette engagement under hard efforts and rough trails. Real-world benefits include quieter hubs, reduced freehub play, consistent shifting, and extended cassette life. Because it's a direct OEM part, fitment quality equals original factory tolerances—no adapters or DIY machining required. • OEM SRAM part number: 11.2015.018.100 (Model ID HU-SPP-A0) • Precision-machined alloy body with hardened spline surfaces • Optimized for low rotational mass and torsional stiffness

Fit, Compatibility & Installation Notes

This freehub body is specifically made for SRAM MTH-series hubs (MTH 406). Before purchasing, confirm your hub model and serial info match the MTH 406 specification and the SRAM model ID (HU-SPP-A0). It's intended for standard SRAM MTB cassette engagement—check cassette speed/cassette type compatibility with your hub system. Installation requires basic hub service: remove the axle and end caps, swap the freehub body, inspect and, if needed, replace seals and bearings. Use light grease on splines and threads, follow SRAM torque specs, and check pawls/ratchet surfaces inside the hub for wear. If you're unsure, a qualified wheel tech can fit and verify bearing preload and seal seating.

Who This Is For

The MTH 406 freehub body is for mountain bikers and mechanics who need an OEM-quality replacement to restore hub performance. It's ideal for trail and cross-country riders who want quiet hubs, consistent engagement, and long cassette life after the original freehub has developed play or noise. If you race, ride aggressively on rough trails, or keep your bike for years—replacing a worn freehub body with a genuine SRAM part is a cost-effective way to prolong wheel life and maintain reliable drivetrain performance.

Key Features

  • ✓ Genuine SRAM OEM replacement part 11.2015.018.100
  • ✓ Precision-machined alloy body with hardened steel spline interface
  • ✓ Direct-fit for SRAM MTH 406 hubs (Model ID HU-SPP-A0)
  • ✓ Restores cassette engagement, reduces play and noise
  • ✓ Lightweight design preserves wheel acceleration and handling
  • ✓ Easy shop-level install — axle removal and standard tools required
  • ✓ Ships in protective packaging (12.4" x 9.1" x 4.6", 2 lb)

Product Identifiers

Vendor Item # 11.2015.018.100
UPC 710845641718

Frequently Asked Questions

Is this freehub body compatible with my SRAM hub?

This part is designed for SRAM MTH 406 hubs (SRAM Model ID HU-SPP-A0). Confirm your hub model matches MTH 406 before purchase. If in doubt, check hub stamping or contact Forest Bikes with your hub serial for verification.

Can I use this with any SRAM cassette speed (8/9/10/11)?

The MTH 406 freehub body accepts standard SRAM MTB cassettes designed for that hub platform. Compatibility with cassette speed depends on your hub's driver and cassette standards—verify the cassette type against hub specs to ensure proper fit.

Do I need new bearings when replacing the freehub body?

Not always. Inspect hub bearings during service—if they show roughness, play, or corrosion, replace them while the hub is open. Fresh grease and correct bearing preload will ensure smooth operation after reassembly.

Can I install this at home or should a shop do it?

A competent home mechanic with cone wrenches and basic hub tools can swap this freehub body. However, if you lack tools or experience with bearing preload and seal fitting, a bike shop will ensure correct installation and torque settings.

Does this freehub body include seals or pawls?

This replacement freehub body is primarily the alloy body assembly. Seals, pawls, and internal ratchet components may be separate depending on hub service kits—inspect your current assembly and purchase any additional service parts if needed.

What maintenance keeps this part working longer?

Regular cleaning, periodic disassembly to inspect pawls/seals, and applying fresh grease to splines and bearings will prolong service life. Avoid high-pressure washing directly into hub seals to prevent contamination.

Buying Guide

When buying a freehub body, prioritize exact fit and OEM part numbers. Match the manufacturer part number (11.2015.018.100) and the SRAM Model ID (HU-SPP-A0) to your hub; this avoids compatibility headaches and ensures correct cassette engagement. Consider doing a full hub service while replacing the freehub body—new bearings, seals, and grease will maximize longevity and keep your wheel running smoothly. If you lack tools or experience, have a qualified mechanic perform the swap to guarantee proper preload and safety.

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