Wheels Manufacturing Multi Adapters
Multi Adapters
Wheels Manufacturing

Wheels Manufacturing Multi Adapters

In Stock

Wheels Manufacturing BBUNIV-SHIM adapters let 24mm Shimano cranks run in BB30/PF30 shells (68–83mm). Includes a full spacer kit for a precise, creak-resistant conversion.

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Available Options

Option Price Availability
Wheels Manufacturing, BBUNIV-SHIM, BB/PF30 Universal adapter for 24mm Shimano cranks — In Stock
Wheels Manufacturing, BBUNIV-SRAM, BB/PF30 Universal adapter for 22/24mm SRAM cranks — In Stock

Product Details

Overview & Technology

Wheels Manufacturing BBUNIV-SHIM is a precision-machined adapter kit designed to convert BB30 and PressFit30 frames to accept 24mm Shimano-style crank spindles. The kit provides a set of CNC-machined spacers and sleeves that position the spindle correctly and restore bearing preload without the need for specialized tools. Engineered for compatibility and reliability, these adapters are made from durable, lightweight alloy and heat-treated steel components where required to maintain dimensional stability under load. The result is a conversion that minimizes creak, preserves chainline, and keeps your crank spinning smoothly mile after mile.

Key Features

Complete spacer kit — Each one-bike package includes a range of precision spacers to cover BB shell widths from 68mm to 83mm so you can build the correct stack for your frame. The kit is designed to work with both true BB30 and PF30 (press-fit) shells. Precision fit and materials — CNC-machined alloy sleeves and hardened steel inserts ensure consistent spindle support and long-term wear resistance. The tolerances are held tight to reduce movement and eliminate bottom bracket creaks often experienced with mismatched components.

Fit & Compatibility

This adapter is made specifically for frames with BB30 or PF30 (BB shell width 68–83mm) and cranks with a 24mm spindle diameter — commonly Shimano Hollowtech II style cranks and similar 24mm standards. The BBUNIV-SHIM variant targets Shimano/24mm spindles; Wheels Manufacturing also offers a BBUNIV-SRAM option for 22/24mm SRAM standards. Shipping dimensions are compact (4" x 3.2" x 1") and the kit weighs ~0.05 lb, making it a simple, lightweight upgrade. Note: press-fit shells may still require a compatible retaining ring or bearing cup depending on your frame and bearings — follow the assembly spacing guide included in the kit for correct stack height and preload.

Who It's For

This adapter is ideal for road and gravel riders who own a BB30 or PF30 frame but prefer or already own Shimano 24mm cranksets. If you've upgraded your cranks, bought a used frame, or simply want to run a wider selection of crank options, this kit removes the compatibility barrier without buying a new bottom bracket system. It's also suitable for mechanics and home wrenchers who value a clean, adjustable solution: the kit's spacer-based approach is versatile across multiple shell widths and avoids permanent modifications to your frame.

Key Features

  • ✓ Converts BB30/PF30 frames to accept 24mm Shimano-style cranks
  • ✓ Complete CNC-machined spacer kit for 68–83mm shell widths
  • ✓ Precision alloy sleeves and hardened steel inserts for long life
  • ✓ Reduces creak and restores correct chainline and preload
  • ✓ Includes enough spacers for virtually any BB30/PF30 conversion
  • ✓ Lightweight, compact kit that installs with common tools

Specifications

BB Shell Type BB30
Crank Spindle Diameter 24mm

Product Identifiers

Vendor Item # BBUNIV-SHIM
UPC 836572008904

Frequently Asked Questions

Will this let me use Shimano 24mm cranks in my BB30 frame?

Yes. The BBUNIV-SHIM kit adapts BB30 and PF30 shell types (68–83mm) to accept 24mm Shimano-style spindles. Use the included spacers to set the correct stack height for proper preload and chainline.

Do I need pressed-in bearing cups or a special bottom bracket?

The adapter supplies sleeves/spacers to position the spindle, but you still need compatible bearings for PF30 or BB30 shells. Some frames require pressed-in cups or retaining rings depending on the bearing type—check your frame’s instructions and the bearing manufacturer’s recommendations.

Is this kit compatible with SRAM cranks?

This specific BBUNIV-SHIM variant is optimized for 24mm Shimano-style spindles. Wheels Manufacturing offers a separate BBUNIV-SRAM version for 22/24mm SRAM standards to cover mixed spindle sizes.

How do I prevent creaking after installation?

Ensure surfaces are clean, use the correct spacer stack, torque crankfixing bolts to spec, and apply recommended grease or assembly paste where appropriate. The precision fit of the CNC sleeves also helps reduce movement that causes creaks.

Can I use this with eccentric bottom brackets or adapters?

This kit is intended for standard BB30/PF30 shells with fixed bottom bracket location. Eccentric BBs or specialized adapters may need additional or different hardware—verify compatibility before installation.

Buying Guide

When selecting bottom bracket adapters, confirm your frame’s shell type (BB30 vs PF30) and exact shell width. Look for kits that include a full range of spacers to dial in spindle position and chainline—this avoids unnecessary additional purchases. Consider whether you need a Shimano (24mm) or SRAM (22/24mm) specific adapter and pair the adapter with high-quality bearings or cups suited to your frame. If you’re unsure, measure your shell and crank spindle or bring them to a shop for verification.

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