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Praxis Works M30 Bottom Bracket - T47 Internal Road 85.5mm

Praxis Works M30 Bottom Bracket - T47 Internal Road 85.5mm

The Praxis T47 Internal Bearing (I.B.) M30 Bottom Bracket is designed for installing Praxis M30 sp...

Best current price£44.99from Tweeks Cycles

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Tweeks CyclesPraxis Works T47 IB - M30 Bottom Bracket - Black
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eBayPraxis Works T47 IB - M30 Cycle Bike Bottom Bracket
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Product Information

Full details

The Praxis T47 Internal Bearing M30 Bottom Bracket is designed for road cyclists who need a high-performance, durable solution for installing M30 spindle-based cranksets into T47 I.B. 85.5mm frames. This bottom bracket delivers exceptional smoothness and long-term reliability thanks to its heat-treated aluminum construction and premium steel bearings, though it specifically requires the use of the proprietary Praxis M30 tool for proper installation and maintenance.

All features

Model Part NumberPR-47-8000
BrandPraxis Works

Extended Product Information

FAQs

Can I use this with a standard 30mm spindle crank?

No, this bottom bracket is specifically stepped for M30 spindles (30mm drive side, 28mm non-drive side) and will not fit standard 30mm cranks.

Do I need a special tool for this?

Yes, you must use the Praxis M30 bottom bracket tool to properly install and remove the cups.

Is this compatible with T47 External Bearing frames?

No, this model is specifically for T47 Internal Bearing (I.B.) 85.5mm frames.

How often should I service the bearings?

Service intervals depend on riding conditions, but generally, a light cleaning and re-greasing of the accessible seals during a seasonal tune-up is recommended.

Does this include the necessary spacers for 85.5mm shells?

The unit is designed to fit the 85.5mm standard directly; consult your specific crank manual for any additional required spindle spacers.

Troubleshooting

Cracking or clicking sound while pedaling

Check that the bottom bracket cups are tightened to the correct torque and ensure no grit is present between the crank and the bearing race.

Excessive drag on the crankset

Verify that no extra spacers were used that were not specified for your frame width and ensure the seals are properly seated.

Pros and Cons

Pros

  • Excellent durability from heat-treated aluminum cups
  • Smooth operation with high-quality cartridge bearings
  • Precise fitment specifically tuned for M30 road spindles
  • Advanced sealing prevents contamination in harsh conditions

Cons

  • Requires a specific Praxis M30 installation tool
  • Limited to use with M30 spindle-based cranks only
  • Not compatible with standard 24mm or 30mm universal spindles without adapters

Setup, Compatibility & Care

This bottom bracket is strictly compatible with T47 Internal Bearing 85.5mm road frames and Praxis M30 spindle cranksets.

  1. Preparation: Ensure the frame shell is clean and free of debris. Apply a high-quality bicycle grease to the threads of the bottom bracket cups.
  2. Installation: Thread the cups into the frame using the Praxis M30 bottom bracket tool. Ensure the drive side cup is tightened to the manufacturer's recommended torque specification.
  3. Crank Insertion: Carefully slide the M30 spindle through the bearings, ensuring the seals remain seated correctly.
  4. Care: Avoid high-pressure water spray directly at the bearing interface during bike washes, as this can force contaminants past the seals. Periodically check for play in the crank arms and verify that the cups remain tightened to spec.

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