FSA BB/PF30 to MegaExo Reducer
FSA

FSA BB/PF30 to MegaExo Reducer

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Lightweight FSA adapter sleeve that lets 24mm MegaExo and Shimano Hollowtech II cranks run in BB30 or PF30 frames. CNC aluminum core with plastic cover — 83 g.

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Product Details

Overview & Technology

FSA's BB/PF30 to MegaExo Reducer is a precision-machined aluminum adapter sleeve designed to convert BB30 and PF30 press‑fit frames to accept 24mm spindle cranks like FSA MegaExo and Shimano Hollowtech II. The aluminum core provides the stiffness and alignment riders expect, while the plastic outer cover gives a tidy finish and protects the frame’s pressed bearings from direct metal contact. The reducer is engineered to tight tolerances so chainline and crank preload behave predictably once installed. At just 83 g, this is a lightweight, low-profile solution for riders who want to fit road, triathlon or compact cranksets to frames originally spec'd for BB30/PF30 shells.

Key Features & Benefits

Material and construction: CNC-machined aluminum core wrapped in a molded plastic cover for a secure interface and frame protection. The alloy sleeve resists deformation under load, keeping spindle alignment true for smooth drivetrain performance. Real-world benefits: • Converts BB30/PF30 shells to 24mm spindle standard without replacing your frame bearings. • Lightweight at 83 g — adds minimal mass compared with bulky adapter systems. • Neat appearance: plastic cover hides the sleeve and seals the bearing interface from dirt and grit.

Fit, Compatibility & Installation Notes

This adapter is built for BB30 and PF30 press‑fit shells and accepts cranks with a 24mm spindle diameter, including FSA Energy, Gossamer Pro, Gossamer, Vision TriMax and MegaExo cranksets, as well as Shimano Hollowtech II. Manufacturer part number: 200-3203, product number: 380289. Important installation notes: the reducer itself does not include sealed bearings — you must use compatible 24mm‑ID sealed bearings sized for BB30/PF30 shells (bearings sold separately). Use a proper bearing press or shop service to install bearings and press the adapter squarely. Light grease on the sleeve and bearing interface will aid assembly and protect against creaks.

Who This Adapter Is For

This is the go‑to solution for road, triathlon and time‑trial riders who own a BB30 or PF30 framed bike but prefer cranks with a 24mm spindle standard. It's ideal for riders switching to FSA MegaExo or Shimano Hollowtech II cranks without wanting to change their frame’s pressed bearings or cups. If you value a lightweight, low‑profile adapter that maintains crank alignment and chainline — without bulky external hardware — this reducer is a practical, inexpensive upgrade for workshop installations or quick crankset swaps.

Key Features

  • ✓ Converts BB30/PF30 frames to accept 24mm MegaExo and Hollowtech II cranks
  • ✓ CNC-machined aluminum core for stiffness and precise alignment
  • ✓ Plastic outer cover protects bearings and gives a clean finish
  • ✓ Lightweight solution at only 83 grams — minimal added mass
  • ✓ Compatible with FSA Energy, Gossamer, Vision TriMax and Shimano cranks
  • ✓ Includes adapter sleeve only; sealed 24mm bearings sold separately
  • ✓ Manufacturer part number 200-3203 (Product #380289)
  • ✓ Compact 1.8" shipping footprint — easy to carry in a tool kit

Specifications

BB Shell Type BB30
Crank Spindle Diameter 24mm

Product Identifiers

Vendor Item # 200-3203
UPC 400310051752

Frequently Asked Questions

Will this adapter let me fit Shimano Hollowtech II cranks to my BB30 or PF30 frame?

Yes. This reducer converts BB30/PF30 shells to accept 24mm spindle cranks such as Shimano Hollowtech II. You still need the correct sealed 24mm‑ID bearings sized for BB30/PF30 shells, which are not included.

Are bearings included with the adapter?

No. The adapter is an alloy sleeve with a plastic cover — sealed bearings must be sourced separately. Use bearings explicitly specified for 24mm spindles in BB30/PF30 shells to ensure correct fit and longevity.

Does this work on both BB30 and PF30 shells?

Yes. The sleeve is designed for both BB30 (metal press-fit) and PF30 (plastic cup) press-fit systems. For PF30 frames verify your existing cups/bearings’ outer dimensions and choose compatible sealed bearings if replacing them.

How should I install the reducer for best results?

Press bearings squarely into the shell using a bearing press, apply light grease to the sleeve and bearing interface, then fit the adapter. Avoid hammering the sleeve directly; use a proper press or take it to a bike shop to prevent damage and ensure correct alignment.

Will using this adapter affect chainline or crank preload?

When installed correctly with the right bearings, chainline and preload remain consistent with the crank manufacturer’s specifications. Always follow torque and preload instructions from the crankset manufacturer to avoid play or bearing wear.

Is this adapter suitable for mountain or gravel cranksets?

The adapter is primarily aimed at 24mm road and triathlon crank standards like MegaExo and Hollowtech II. It will physically fit frames with BB30/PF30 shells, but verify crank model compatibility and intended use for off‑road or high‑impact riding.

Buying Guide

When choosing a bottom bracket reducer, first confirm the spindle diameter of the crankset you want to run and the type of BB shell on your frame. This FSA adapter is for 24mm spindles and fits BB30/PF30 frames. If your crank uses a different diameter (e.g., 30mm, 30 mm+), you'll need a different reducer or a complete bottom bracket conversion kit. Remember that adapters are sleeves only — sealed bearings appropriate for 24mm spindles and your shell type are required. If you plan to do the install yourself, acquire a bearing press and follow torque recommendations from the crank manufacturer for reliable performance and long bearing life.

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