The Rant Bang Ur bottom bracket is a complete MID-style kit designed for BMX and street builds using 19mm crank spindles. It includes all the core hardware needed for a clean, reliable install, making it a straightforward option for new builds or bottom bracket replacements.
Riders choose the Bang Ur when they want a durable, no-nonsense MID bottom bracket that installs easily and holds up to hard riding.
Key Features
• Complete MID bottom bracket kit for 19mm spindles
• Two precision R12 sealed bearings
• CNC-machined aluminum cone spacers
• Internal spacer and steel crank spacers included
• AL6061 alloy cups
• Press-fit design
Compatibility & Use Notes
• Bottom bracket shell type: MID
• Spindle size: 19mm
• Cup / bearing outer diameter: 41mm
• Press-fit installation
• Compatible with MID BB frames only
• Not compatible with Euro, Spanish, or American BB shells
Service / Ownership Context
Press-fit bottom brackets require a clean, properly sized shell for best results. Bearings should be pressed in squarely to avoid premature wear. Periodic inspection is recommended, especially for bikes used in BMX, park, or street riding.
Fit & Use Signals
• A good fit for BMX and street bikes using MID BB shells
• Commonly chosen for 19mm crank setups
• Works well for new builds or full drivetrain refreshes
• Not ideal for frames with threaded Euro BBs
• Not the right choice for 22mm or 24mm crank systems
