Wheels Manufacturing BB30 Adapter
BB30 Adapter
Wheels Manufacturing

Wheels Manufacturing BB30 Adapter

In Stock

Wheels Manufacturing BB30-SHIM adapts 24mm spindle cranks (Shimano, FSA) to BB30 frames. CNC-machined alloy adapters press into 6806 bearings for a precise, lightweight fit.

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Available Options

Option Price Availability
Wheels Manufacturing, BB30 to Shimano 24mm adapter, Black, Pair, BB30-SHIM — In Stock
Wheels Manufacturing, BB30 to SRAM 22/24mm adapter, Black, Pair, BB30-SRAM — In Stock

Product Details

Overview & Technology

Wheels Manufacturing BB30-SHIM is a precision adapter pair that lets you run 24mm spindle cranks—like Shimano and many FSA models—on BB30 frames. The adapters seat into the 6806 bearings installed in a BB30 shell, converting the large BB30 bore to accept a 24mm spindle with minimal fuss. Each adapter is CNC-machined from high-grade alloy and finished with a protective hard-anodize to resist corrosion and wear. The slim, low-profile design keeps weight down while maintaining concentricity and stiffness for reliable power transfer and chainline accuracy.

Key Features & Construction

Material and machining: These adapters are precision-machined from durable aluminum alloy (typical 6061 series) and treated with a hard-anodized surface for long life and smooth installation. The tight tolerances ensure a snug fit inside the 6806 bearing OD to minimize play. Design benefits: The BB30-SHIM adapters are light (pair weighs ~0.11 lb with packaging), easy to install by tapping into the bearing race, and they preserve the low Q-factor and stiffness of your crankset. Use crank spindle spacers to dial in chainline or to take up side-to-side play for silent, solid pedaling.

Fit, Compatibility & Installation

Compatibility: Designed for BB30 shell frames with 6806 bearings already pressed in. Works with 24mm spindle cranks from Shimano and many FSA models. Wheels Manufacturing also offers a BB30 to SRAM 22/24mm variant for SRAM GXP/other spindles. Installation notes: The adapter pair is tapped into the bearing race—use a flat drift or the appropriate installation tool and a rubber mallet or arbor press for even seating. Apply a thin smear of anti-seize or light grease to the adapter OD before installation to ease fitting and reduce creak risk. Use crank spindle spacers to fine-tune chainline or remove lateral play; check torque specs on crank bolts and re-check after the first rides.

Who This Is For

This adapter is for riders who own a BB30-framed road or gravel bike and want to install 24mm spindle cranks (commonly Shimano and FSA) without replacing the frame’s bearings or shell. It's ideal for upgrading cranks, mixing drivetrain parts, or adapting donor cranks between frames. Home mechanics, workshop techs, and fitters who value a lightweight, simple solution for compatibility issues will appreciate the BB30-SHIM’s reliable fit and minimal profile. If you run SRAM GXP or other 22/24mm systems, choose the BB30-SRAM variant instead.

Key Features

  • ✓ Adapts 24mm Shimano/FSA spindles to BB30 frames quickly
  • ✓ CNC-machined alloy adapters with hard-anodized corrosion resistance
  • ✓ Seats into 6806 bearings for concentric, low-friction fit
  • ✓ Lightweight, low-profile design preserves crank stiffness and Q-factor
  • ✓ Use crank spindle spacers to fine-tune chainline or remove play
  • ✓ Simple press-in/tap installation — no new bearings required
  • ✓ Available SRAM 22/24mm variant for GXP and mixed systems

Specifications

BB Shell Type BB30
Crank Spindle Diameter 24mm

Product Identifiers

Vendor Item # BB30-SHIM
UPC 836572005910

Frequently Asked Questions

Will these adapters work in any BB30 frame?

Yes if your BB30 shell has the standard 6806 bearings (the common sealed bearing used in BB30 conversions) installed. The adapters seat into the 6806 bearing OD; if your frame uses a different bearing size or an integrated one-piece axle, confirm bearing type first.

Do I need special tools to install the adapters?

Installation is straightforward but benefits from a flat aluminum/plastic drift or the proper Wheels Manufacturing press tool and an arbor press or rubber mallet to ensure even seating. Using a non-marring drift prevents damage and helps align the adapter squarely.

Can I use the BB30-SHIM with ceramic bearings or press-fit conversion kits?

Yes — as long as the bearing inside the shell has the correct 6806 outer diameter that the adapter can seat into. Ceramic bearings with the same dimensions are compatible; ensure bearings are correctly pressed and squared before installing the adapter to avoid premature wear.

How do I set chainline and remove side-to-side play?

Use crank spindle spacers supplied with or recommended for your crankset to shift the spindle laterally and achieve the correct chainline. If you see lateral play after install, add thin spacers on the spindle or double-check adapter seating and crank bolt torque.

Will these adapters cause creaks or noise?

A proper installation, clean bearing seats, and a light film of grease or anti-seize on the adapter OD minimizes the chance of creaks. Uneven seating, dirty bearing races, or improper torque can cause noise — re-check installation if you hear creaking.

Which variant should I choose for SRAM cranks?

For SRAM GXP or other 22/24mm spindle systems you’ll want the BB30-SRAM variant (BB30 to SRAM 22/24mm). The BB30-SHIM is specifically sized for 24mm Shimano/FSA spindles.

Buying Guide

When buying BB30 adapters, first confirm your frame’s bearing type and crank spindle diameter. The BB30-SHIM is purpose-built for 24mm Shimano/FSA spindles and installs into 6806 bearings — if your setup differs, select the matching variant to avoid fit issues. Consider ease of install (drift vs press), material and finish (hard-anodized aluminum is durable and light), and whether you’ll need crank spindle spacers to achieve the correct chainline. For frequent crank swaps or multiple frames, a durable adapter like the BB30-SHIM delivers a reliable, long-term conversion solution.

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