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How to soften a ela...
 

[Closed] How to soften a elastomer spring?

 Earl
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[#9385743]

My kid wanted a suspension seatpost. The only one i could find that would fit the 26.8 seat tube has a elastomer spring. The spring looks in good condition but its too firm for her weight.

Is there a way to make it softer? Drill a hole through the centre or lots of holes through the sides?


 
Posted : 16/06/2017 5:07 pm
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holes through the sides, then you can start with a few small and see how you get on, add more if needed?


 
Posted : 16/06/2017 5:22 pm
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Only ride it on a warm day?


 
Posted : 16/06/2017 5:44 pm
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Isnt there a bolt in the bottom of the seat post which compresses it.


 
Posted : 16/06/2017 5:56 pm
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Isn't there a bolt in the bottom of the seat post which compresses it.

pre-loading or pre-compressing a spring doesn't change it's rate though, just the amount of force required to initiate movement.

BITD when I had elastomer forks with a limited range of elastomer grades I drilled small holes through the sides.


 
Posted : 16/06/2017 6:01 pm
 Earl
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Warmer that today????

Thanks folks - drill coming out.


 
Posted : 16/06/2017 6:16 pm
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Aye. Drill it out. Its just holes held together by rubber. More holes is not a problem.


 
Posted : 16/06/2017 7:15 pm
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On my 150 mm flexstem ,I drilled tiny .5 mm pilot holes through it


 
Posted : 16/06/2017 8:50 pm
 Earl
Posts: 1902
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Just a update.

I needed it a lot softer. Drilling worked a treat.

Started off drill bit 1 around a cm apart. Tested, redrilled, tested etc.. Ended up with bit 5. Looks like Swiss cheese - very happy kid.

Thanks all.


 
Posted : 19/06/2017 1:42 pm