A practical choice for road or mountain bike owners replacing a worn PF30 bottom bracket while retaining a 30 mm BB30 crankset.
The BottomFit PF30 is designed for PF30 frames with a 46 mm shell, 68 or 73 mm shell width and cranksets using a 30 mm spindle. It uses the same general bearing format as BB30, with cups positioned between the frame and bearings to suit the PF30 interface.
For day-to-day riding, the focus is on smooth, dependable rotation rather than unnecessary complexity. The self-aligning bearings help accommodate small alignment variations, while the three-piece threaded design brings the cups together inside the press-fit shell. The fully CNC-machined construction uses 6061 T6 and 7075 T6 aluminium components, with chrome steel BB30 6806RS bearings.
This is a good choice when you want a robust PF30 replacement for a 30 mm BB30 crankset. Compatibility is specific: the product manual lists PF30 shells measuring 68/73 mm wide, 46 mm in diameter, paired with a 30 mm spindle. Correct shell preparation, alignment and installation are important with any press-fit bottom bracket, so use the specified tools or have the job completed by a qualified bike mechanic.
PF30 compatibility
Designed for PF30 press-fit frames with a 46 mm shell diameter and 68/73 mm shell width.
For 30 mm spindles
Compatible with the 30 mm spindle BB30 crankset format listed in the product manual.
Self-aligning bearings
The bearing design helps accommodate alignment variations and supports longer service life.
Chrome steel bearings
BB30 6806RS chrome steel bearings are specified for smooth, durable everyday operation.
Three-piece threaded design
The cups join through a threaded three-piece arrangement inside the press-fit shell.
CNC-machined construction
Fully CNC-machined components provide a precise, cleanly finished bottom bracket assembly.
Low system weight
At 133 g, it adds dependable support without being a heavy replacement option.
Workshop installation required
A correct press-fit installation needs suitable removal and pressing tools, careful shell preparation and accurate alignment.
General
Dimensions and weight
Materials and construction
Features
PF30 - Press fit 30
The PF30 format is designed for frames with a 46 mm bottom bracket shell and uses a cup between the frame and bearings for added durability.
Self-aligning bearings
The bearings help accommodate alignment variations, supporting smooth operation and longer service life.
Fully CNC-machined construction
Precision-machined components deliver a clean, durable construction for dependable drivetrain performance.
Chrome steel BB30 6806RS bearings
Chrome steel bearings are specified for smooth rolling performance and durable everyday use.
Part of your ride
BBB Cycling is a Dutch cycling brand established in 1998 by former cyclists Chris Koppert and Frank Moons. The company develops a broad range of cycling parts, accessories, apparel and workshop products, with more than 1,500 products across dozens of categories.
The brand is based in Leiden, the Netherlands and positions its product development around rider feedback, in-house experience and prototype testing. Over the years, BBB Cycling says its products have received more than 100 product and innovation awards, and the brand sells across road, mountain bike, gravel, urban and workshop categories.
