Odyssey 19mm Sealed Mid Bottom Bracket — Press-Fit MID, 6061-T6 Aluminum Dust Spacer, Includes Spacers

Odyssey 19mm Sealed Mid Bottom Bracket is a sealed, press-fit mid shell unit designed to support 19mm/.750 crank spindles while simplifying installation and chainline tuning.

This sealed mid bottom bracket from Odyssey fits press-fit MID frames and accepts 19mm spindle cranks. It ships with a full set of spacers and an aluminium dust spacer so you can dial in crank clearance and chainline without hunting for extra parts. The sealed bearings protect internals from dirt and moisture, while the 6061-T6 aluminium dust spacer keeps the assembly light and rigid.

How does this bottom bracket fit my frame and cranks?

The Odyssey unit is built for press-fit MID bottom bracket shells and cranks with 19mm (.750) spindles. It presses into the frame’s mid-sized shell and centers the crank spindle properly for consistent rotation. If your bike uses a different press-fit standard or a different spindle diameter, this model will not be compatible.

• Fits press-fit MID bottom bracket shells
• Accepts 19mm / .750 crank spindles
• Not for BB30, BSA, or oversized spindles
• Includes spacers to adapt chainline and clearance

What tools and steps are needed for installation?

Installation is straightforward for anyone familiar with press-fit components: press the cups into the shell, fit the supplied spacers and dust spacer to set chainline and clearance, then install the crank. Use a proper press tool to avoid damaging cups or the frame, and check bearing preload after assembly. No special machining is required beyond a standard mid-BB press and torque tools for the crank bolts.

• Requires a press-fit BB installation tool
• Use crank bolt torque wrench for final tightening
• Adjust included spacers to optimize chainline
• Verify bearing preload and smooth rotation after install

How does the sealed design affect performance and maintenance?

The sealed bearings reduce ingress of dirt and water, extending service intervals compared with open-bearing kits. Seals keep lubrication inside and contaminants out, so you’ll experience smoother rotation longer with less frequent rebuilds. When service is needed, the unit is replaceable as a cartridge-style assembly.

• Sealed bearings limit contamination and prolong life
• Lower routine maintenance compared to open systems
• Cartridge-style replacement simplifies future servicing
• 6061-T6 aluminium dust spacer balances weight and strength

Which adjustments can I make to fine-tune chainline and crank clearance?

Odyssey supplies an assortment of spacers so you can move the crank axle laterally to achieve proper chainline and ensure the crankarm doesn’t rub the frame. Try combinations of spacers while checking pedal-to-frame clearance and chain alignment before final torque. The aluminium dust spacer also helps set the correct axial spacing and reduces play.

• Mix spacers to tweak lateral chainline position
• Use dust spacer to set axial distance and eliminate play
• Test crank rotation and pedal clearance after each change
• Record spacer stack for future reference or replacement

Who is this for: Riders with press-fit MID bottom bracket frames who run 19mm (.750) spindle cranks and want a straightforward sealed cartridge unit with included spacers and an aluminium dust spacer. It’s ideal for BMX and commuter bikes using the mid standard where simple installation, low maintenance, and precise chainline adjustments matter.