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- Seat Post Slippage

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Bicycle Seat Post Slippage

If your seat drops in the middle of a rather tricky trail, I can tell you that you'll not be a happy rider... it can throw off your balance and end in a messy crash. Most often it is caused by not getting the right bike part in the first place....

Possible Cause #1:

  • bicycle seatpost diameter is not the correct size to match your seat pipe.

Seat posts come in a huge array of sizes, especially because today there are so many manufacturers around the world inflicting their own sizes as standard. As well, mountain bike tubes are not exactly the same as a road bike tube. Although the sizes are similar, the diameters are fractionally different.

It is important to do the research on your frame and find the manufacturer's recommendation and then get the right sized seat post for your frame. It may be that your local shop has either the frame manual or the tools to accurately measure and recommend the pipe necessary for your bike frame.

Possible Cause #2:

If you have tightened the seat post clamp as tight as it will go and the seat post is still moving, check to see if the split ring in the clamp is bottoming out (ie. completely closed). If this is the case then it could be that you have a clamp that is too big for your seat tube.

If you over torque the clamp you could end up distorting the shape of the seat tube, snapping the quick release lever or stripping the thread on the clamp. Excessive tensioning should not be necessary.

Road Repairs:

If you get stranded along the trail, and the seat post will just not stay in place it is possible to remove the post, wipe off any grease on the stem and roll it in a bit of mud. Wipe off the excess and replace it in the tube. This should give you enough traction to get you home.

When you get back to the garage, be sure to remove and clean the post or any residual moisture will encourage corrosion.

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Products, specifications, and techniques shown are meant as a guide only.

Owners of this site assume no liability for and make no claim to the suitability of any products or information shown, other than to report history of usage, and sharing of knowledge from others.

It is the sole responsibility of the owner to adequately test for suitability and application method for a product..

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copyright Jan. 2007