Pitlock Seatpost Clamp

(17 customer reviews)

From: $12.99

Replaces unsuitable clamps with non-parallel clamping surfaces, or surfaces that are too small. These seat clamps are specifically designed to accept Pitlock seatpost skewers.

Seat clamps come in either silver or black, and are available in five sizes sizes: 28.6mm, 30.0mm, 31.8mm, 35.0mm, and 40.0mm.

See below for additional product and sizing specifications.

SKU: PNOSS31NUB Category:


Pitlock’s locking skewers are designed to work on flat, parallel surfaces. If your bike’s existing seat collar does not have flat surfaces to accept the skewer, you will need to replace the unsuitable clamp with one designed specifically by Pitlock.

The standard-length Pitlock seatpost skewer (33mm) will fit any size Pitlock seatpost clamp/collar.

To replace your existing seat clamp, measure the outside diameter of your seat tube. Have more questions? Check out our additional instructions on how to measure your bike for Pitlocks.

Seat clamps are available in either silver or black, and come in five sizes: 28.6mm, 30.0mm, 31.8mm, 35.0mm, and 40.0mm.

Additional information

Seat Collar Size

28.6mm, 30.0mm, 31.8mm, 35.0mm, 40.0mm

Seat Collar Color

Silver, Black

17 reviews for Pitlock Seatpost Clamp

  1. John M DeMarco (verified owner)

  2. Anonymous (verified owner)

    Jason is very easy to work with and quick at responding!

  3. Patrick G. (verified owner)

    Excellent and friendliest service. Couldn’t ask for more! Fast efficient, effective, and best price.

  4. George C. (verified owner)

  5. Eric Dobson (verified owner)

    Quality is good and I think it will work out well… once I get the correct size. Follow the measuring instructions! I assumed too much, and it turns out I have an odd seat tube dimension. Looking forward to getting the right size installed.

  6. Justin C. (verified owner)

    Ordered a few in the wrong size but finally got one that fits. Fast shipping and helpful people.

  7. Alan B. (verified owner)

    Fantastic customer service with great email communication. Pitlock products are the best of their genre and nobody has a better selection in stock in North America. Highly recommended.

  8. Anonymous (verified owner)

    I’ve searched for these for years. As far as I can tell, Urban Bike Tech is the only supplier in the Americas.

  9. Derek E. (verified owner)

    This is a high quality clamp but measure your post carefully. Jason was stellar in helping me get the right fit. 5 stars.

  10. Martin Bailey (verified owner)

  11. Gulliver (verified owner)

    Fit perfect and works perfect.

    To Urban Bike Tech: thanks for the great customer service and fast shipping that you have always provided over my many purchases.

  12. Anonymous (verified owner)

  13. Douglas (verified owner)

    Perfect! Just the part I needed, shipped promptly. Thanks Urban Bike Tech.

  14. Aidan (verified owner)

  15. Erick J. (verified owner)

    Fit perfectly. Seat is now secure!

  16. Christian Fillion

    Fit perfectly and is ideal with Pitlock seat skewer.

  17. Andre (verified owner)

    Seat post is not leaving my frame without my pit lock key. Excellent security solution.

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