FSA BB30 to English Adapter
FSA

FSA BB30 to English Adapter

In Stock

CNC-machined FSA adapter converts BB30 shells to accept English (British) external-cup bottom brackets for 24mm spindles. Press-fit design for 68mm road shells.

Add to Cart
🚚 Fast Shipping 🔒 Secure Checkout ↩ Easy Returns

Product Details

Overview & Technology

FSA's BB30 to English adapter lets you run a traditional external-cup bottom bracket in a BB30 shell. Designed for 68mm BB30 road shells, this precision adapter converts the press-fit BB30 bore into a British (BSA/English) external-cup interface compatible with 24mm spindle cranksets. The pair is CNC-machined from 6061-T6 aluminium and finished with a corrosion-resistant anodize for long life. Internal bores and contact surfaces are machined to tight tolerances to ensure a press-fit fit and correct bearing alignment, minimizing creak and uneven wear.

Key Features & Benefits

Practical, workshop-ready design: the adapters press into the BB30 shell and provide the correct 68mm English spacing so you can fit readily available external-cup bearings and cranksets. This expands crank options and makes maintenance simpler compared with proprietary BB30 bearings. Real-world benefits include improved serviceability, access to higher-quality sealed external bearings, and compatibility with a wide range of 24mm spindle cranks. Lightweight aluminium construction keeps added mass minimal while resisting corrosion.

Fit, Compatibility & Installation

The FSA adapter is made specifically for BB30 shells with a 68mm width. It converts that shell to accept English (BSA) external-cup bottom brackets designed for 24mm spindles. The available variant is a pair for British 68mm shells and fits common 24mm cranksets from Shimano, SRAM (GXP not applicable), and many road-specific cranks. Installation is a press-fit operation: clean the BB30 bore, apply a light layer of anti-seize or assembly grease, press each adapter cup home with a suitable tool or arbor press, then fit your external-cup bearings and crankset per the bearing/bb manufacturer's instructions. Because tolerances are important, we recommend pressing in straight and checking bearing preload and chainline after assembly.

Who This Adapter Is For

This adapter is aimed at road riders who have frames with BB30 shells but prefer the serviceability and crank compatibility of English external-cup bottom brackets. It's ideal for mechanics upgrading or repairing older BB30 frames, bike builders standardizing parts across a fleet, and riders switching to widely available sealed external bearings. If you want to run 24mm-spindle cranks on a BB30 frame without dealing with BB30 bearings' shorter service life or availability, this adapter is a straightforward, cost-effective solution.

Key Features

  • ✓ CNC-machined 6061-T6 aluminium construction with anodized finish
  • ✓ Converts BB30 68mm shell to English (BSA) external-cup interface
  • ✓ Designed for 24mm spindle cranksets and external bearings
  • ✓ Press-fit installation for secure, precise alignment
  • ✓ Lightweight solution — minimal added weight to the BB area
  • ✓ Ideal for road frames using 68mm BB30 shells

Specifications

BB Shell Type BB30
BB Shell Width 68mm

Product Identifiers

Vendor Item # 230-5005A
UPC 400310039910

Frequently Asked Questions

Will this adapter work in a 73mm BB30 shell?

This specific variant is sized for 68mm BB shells. FSA offers versions for 73mm shells too — check the part number or product listing for the 73mm option. Using the wrong width can cause incorrect chainline and spacing problems.

Can I use this adapter with BB30A or PF30 frames?

BB30 and PF30 have different tolerances and wall thicknesses. While some PF30 shells share similar diameters, compatibility is not guaranteed. Measure your shell and consult the adapter's specifications or contact Forest Bikes if you’re unsure.

Does this adapter include bearings or cups?

No — the adapter pair provides the threaded/external interface. You still need an external-cup bottom bracket (bearings and cups) sized for English 68mm shells and a 24mm spindle crankset to complete the assembly.

How do I install the adapter without damaging the frame?

Clean the BB30 bore, apply a thin layer of assembly grease or anti-seize, and press the adapters in straight using an arbor press or a dedicated BB press tool. Avoid hammering directly on the adapter face and ensure even, gradual pressure to prevent misalignment or damage.

Will this change my chainline or Q-factor?

When used with the correct 68mm external-cup bottom bracket and the intended crankset, chainline and Q-factor should match the crank manufacturer's specifications. Always check chainline after installation and use the correct spacer configuration recommended by the bottom bracket/crankset manufacturer.

Buying Guide

When choosing a BB30-to-English adapter, confirm your frame shell type (BB30), shell width (68mm vs 73mm), and crank spindle diameter (24mm). Match the adapter width to your shell and pick an external-cup bottom bracket and bearings rated for 24mm spindles and English spacing. Prefer adapters machined from 6061-T6 aluminium with tight tolerances and a corrosion-resistant finish. Also plan for installation: a press tool and proper greasing greatly reduce the risk of frame damage and future creaks.

Ready to order?

Shop with confidence at Scenders — premium cycling parts, fast shipping.

View Full Product