68mm Road ConvBB30/PF30 Shmno with R-Collet

Praxis 68mm Road ConvBB30/PF30 Shimano with R-Collet is a precision-engineered bottom bracket designed for installing Shimano Hollowtech II road cranksets into BB30, PF30, and compatible Specialized 2014–2015 OSBB road frames. Built for riders seeking improved drivetrain stiffness, smooth bearing performance, and reliable long-term durability, this bottom bracket system delivers a secure and creak-free solution for modern road bikes.

Praxis uses its patented R-Collet expansion system to create an exceptionally tight and accurate fit inside the frame shell. The longer non-drive cup presses into the frame while the shorter drive-side cup threads into place, evenly distributing pressure for improved frame stability and precise bearing alignment. By positioning the cartridge bearings outboard according to Shimano road specifications, the design enhances crank rigidity and pedaling efficiency while reducing issues caused by frame tolerance inconsistencies.

Manufactured from forged and machined heat-treated 7075-T6 aluminum, this bottom bracket features premium Enduro steel bearings and high-grade grease for smooth, reliable operation in demanding riding conditions. An integrated compressible O-ring helps compensate for shell width variations, ensuring consistent installation and dependable performance for road cyclists and performance-focused riders.

Key Features

• Compatibility: Fits BB30, PF30, and Specialized 2014–2015 OSBB road frames

• Crank Compatibility: Designed for Shimano Hollowtech II road cranksets

• Technology: Patented Praxis R-Collet expansion locking system

• Shell Width: Compatible with 68mm road frame shells

• Bearing Position: Shimano-spec outboard bearing placement

• Construction: Forged and machined 7075-T6 aluminum cups

• Bearings: Premium Enduro steel cartridge bearings

• Noise Reduction: Helps reduce creaking and bearing movement

Product Specifications

• Brand: Praxis Works

• Product Type: Road Bottom Bracket

• Model: ConvBB30/PF30 Shimano with R-Collet

• Shell Width: 68mm

• Frame Compatibility: BB30, PF30, Specialized OSBB (2014–2015)

• Crank Compatibility: Shimano Hollowtech II steel spindle road cranks

• Interface: 24mm Shimano road spindle

• Material: Heat-treated 7075-T6 aluminum

• Bearing Type: Enduro 2437 Drive / 2237ER Non-Drive steel bearings

• Installation Type: Press-fit with threaded internal connection

• Grease Type: High-grade performance grease

• Color: Black

• Included Sleeve: Yes, for BB30 installation

• Not Compatible With: BB30a, BBRight, BB386EVO, BB86, BB92 frames

R-Collet Stability System

• Secure Frame Fit: Expanding collet system creates a stable and precise interface

• Improved Bearing Alignment: Connected cups prevent bearing misalignment under load

• Enhanced Rigidity: Outboard bearing placement improves pedaling efficiency

• Quiet Performance: Reduces movement and creaking during hard efforts

• Tolerance Compensation: Compressible O-ring adapts to frame shell variations

• Long-Term Reliability: Helps prevent bearing walk-out and premature wear

Easy Operation / Usage

• Press the non-drive side cup into the compatible frame shell

• Thread the drive-side cup into place using Praxis M30 BB tools

• Tighten to recommended torque specifications

• Install compatible Shimano Hollowtech II road crankset

• Check crank rotation and bearing smoothness before riding

Why Choose This Product

• Optimized Shimano Compatibility: Specifically designed for Shimano road cranksets

• Advanced R-Collet Technology: Delivers superior frame stability and bearing support

• Premium Materials: High-strength aluminum and Enduro bearings ensure durability

• Smooth Drivetrain Performance: Reduces friction and improves power transfer

• Professional Road Performance: Ideal for racing, endurance, and training bikes

In the Box

• 1 x Non-Drive Side Bottom Bracket Cup

• 1 x Drive Side Bottom Bracket Cup

• 1 x BB30 Installation Sleeve

• Integrated R-Collet System

• Pre-installed Enduro Bearings