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Old 04-10-17, 02:12 AM   #1
chocsal
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Suntour suspension seat for a Brompton

Hi everyone,

Looking to buy a Brompton S2L in June.

Thinking ahead for a seatpost, has anyone tried the suntour SP-12 NCX suspension seatpost on a Brompton?
The standard Brompton stem is 53cm long with a flange and 31.6mm dia. Suntour do sell a 31.6mm dia all the way through with a shorter 35cm length pole.
I am a 5'8 61kg guy, so very light and there should not be too much strain on the suspension post itself.

Is there anything else to consider?
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Old 04-10-17, 02:21 AM   #2
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Buy Brompton, ride it then think about to get a suspension seat post for it, I guess.
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Old 04-10-17, 02:22 AM   #3
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You don't need a suspension seatpost on a Brompton..If your S2L has a firm suspension block and you need more suspension then change it to a standard suspension block...They seem to be fairly soft and provide good suspension if you want it..Also put less pressure in the tyres if you want a softer ride..Just no need for a suspension seatpost..Don't waste your money!
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Old 04-10-17, 02:28 AM   #4
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Not sure what you are saying but you need to keep the flange. A new post need to have the same diameter as the standard post.

It is also possible to use a telescopic solution. Standard size post enters the bike but at the top of that post another post is inserted. This is a heavyer solution but also I find a telescopic seatpost to be a good solution for travelling.

Make sure you need extra suspension before you buy- and make sure it`ll actually work for you. You are wery light (weight) so a suspension that works for a heavyer person may feel rock hard for somebody your weight.

Maybe just get a softer suspension block for your bike?
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Old 04-10-17, 04:26 AM   #5
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I was under the impression the Brompton seat post was 31.8, probably enough of a difference to be significant. Generally speaking the brompton saddle is supposed to be configured such that it's in a position forward of the seat post. Maybe a Brooks flyer would work well.
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Old 04-10-17, 06:17 AM   #6
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+1 to std suspension block and tire pressure - the bike is quite comfortable for what it is. Seat post suspension will impact it's folded size.
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Old 04-10-17, 07:52 AM   #7
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Mr. Chocsal..as I posted before you do not need a suspension seatpost on a Brompton..Just make sure you have the standard rubber suspension unit between the rear triangle and the seatpost..This is quite a soft unit and will give you all the suspension you need..Otherwise let the rear tyre pressure down to 60 to 70psi instead of the 100psi recommended..You would be wasting your money adding seat tube suspension if you could get it to fit..You would be bouncing up and down all the time..
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Old 04-10-17, 08:29 AM   #8
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Quote:
Originally Posted by tudorowen1 View Post
...You would be bouncing up and down all the time..
Agreed. Even on smooth payment the hobbyhorse ride provided by suspension seatposts or sprung saddles while pedaling gets to be too much.
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Old 04-12-17, 01:09 PM   #9
chocsal
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Thank you for the responses.
A work colleague let me test out his sixspeed and it was quite comfortable so I'll hold on changing the seatpost.
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