30mm to 24mm plastic bottom bracket spindle adapter set

1. Product Overview

The 30mm to 24mm bottom bracket adapter is a cost-effective, optimal solution that allows you to easily install 24mm spindle cranksets (Shimano standard, Prowheel, SRAM GXP with spacer, etc.) into bicycle frames equipped with a 30mm bottom bracket (such as BB30, PF30, BB386) without having to replace the entire bottom bracket unit.

2. Key Features

• Premium Engineering Plastic: Effectively eliminates the creaking noise commonly found in metal-on-bearing contact adapters.

• Precision Fit: Fits snugly onto 30mm bearings and 24mm spindle shafts, ensuring optimal concentricity, smooth rotation, and zero play.

• Tool-Free, Easy Installation: Simply press or slide the adapters into both sides of the BB bearings to install your 24mm crankset immediately.

• Ultralight Weight: Minimizes bike weight while retaining high mechanical strength and durability.

3. Specifications

• Product Name: 30mm to 24mm Crankset / Bottom Bracket Reducer Adapter

• Material: High-grade engineering plastic (Black)

• Dimensions:

  • Outer Diameter (fits BB bearing): 30mm

  • Inner Diameter (spindle interface): 24mm

  • Width / Body Thickness: ~8.3 – 8.5mm (featuring an outer lip for secure bearing positioning)

• Color: Black

• Compatibility:

  • Bottom Brackets (BB): BB30, PF30, BB386 with a 30mm internal bearing diameter.

  • Cranksets: Straight 24mm spindle cranksets such as Shimano Hollowtech II, Prowheel, FSA, Senicx, etc.

4. Package Includes

• 1 Pair (2 pieces) of adapter shims for left and right sides.

Please check all specifications and compatibility carefully before placing your order.