Thudbuster models

pxpaulx

Well-Known Member
Not sure about the difference, but if you're still researching make sure to check out the suntour ncx post as a value alternative. Rare in the US but can be purchased from Europe for around 70 to 80 bucks. Got mine from a German site and it arrived in a week.
 

Greg A

Member
Not sure about the difference, but if you're still researching make sure to check out the suntour ncx post as a value alternative. Rare in the US but can be purchased from Europe for around 70 to 80 bucks. Got mine from a German site and it arrived in a week.
I did exactly the same thing.
It works great too!
 
We have used a many CC Thuds and Suntour NCX on customers bikes over the years. For the most part they get the job done, Both have their strengths and weaknesses. Something was always missing when riding both of those.
The Cirrus Body Float is just it, Taking all the pluses from both posts and making it right. If I had to explain the feeling I would say your bike always now just sits in this "sweet spot" .
I cant speak volumes enough on "Logic" in this seatpost. It just works! We have this service road that parallels our building in the back, super rough never maintained, I was thinking "OK the ultimate test is the Mongoose Fixed gear E-Bike" 30 Mph through the "whoops" on a steel road bike. The only thing that survived was my butt. Haha

We have been adding them to all our builds lately, their just isn't anything like it.
 

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John Dombrowski

Active Member
I believe the OP's bike is a Specialized Turbo which requires a 30.9 mm seatpost. Unfortunately, both the Cirrus Body Float and Suntour NCX come only in 27.2 and 31.6 mm sizes, so a smaller (27.2 mm) post would have to be shimmed to work in the Turbo. Such shims are available here: http://www.jensonusa.com/!-eQPzHCvdjr!Bt!TcnD2vQ!/Proble-Solvers-Seatpost-Shim-Fits-272mm

The Thudbuster ST and LT are both available in 30.9 mm.
I ended up getting the ST for my wife's base Turbo and ordered the LT for my incoming Turbo S but after taking it out of the box, this thing is huge. I want to have some seatpost showing above my topeak rack to add an additional rear lite so I am returning it and ordering the Body Float after seeing one and riding a couple different ebikes that had them at the San Diego Ebike expo yesterday. So compact and soo comfortable on my backside.
My Turbo S is finally in route to San Diego and is supposed to here on Tuesday. Feels like I have been waiting a year for this thing to come in. Next thing to try is one of these suspension stems that are showing up on the market.
 

John Dombrowski

Active Member
She likes it enough to not want another softer seat but I am a pretty thin guy so with the medium elastomer installed I don't feel much of a change. But when I tried the Body Float yesterday, I noticed a big difference so I am willing to pay the extra for that one.
 

Cameron Newland

Well-Known Member
I'm looking at potentially buying the BodyFloat suspension seatpost, but what I'm wondering is how to secure it to the bike frame so that thieves can't just take it off. If I use a regular quick-release seatpost collar, anyone could just take the seat and seatpost.

Currently, I use the stock seat and seatpost and I use a thin security cable (2.5mm steel cable wrapped in a soft clear plastic) combined with a small luggage lock to lock the seat rail to the frame. If a thief is armed with a few tools, though, they could unfasten the quick release seatpost collar, then unscrew the seat rails from the seatpost, and take the seatpost and leave my seat there. Then I'd be out $250.

I've heard about security screws/hardware being used on seatstay collars instead of quick release or 4mm hex screws. For instance, there's one that supposedly can only be unscrewed when the bike is inverted and lying on its seat/handlebars, which means that you couldn't take the seatpost unless you flipped the bike upside down, and to do that, you'd probably have to cut or pick the U-lock. Does anyone have any experience with those, or with other security methods for seats and/or seatposts?