prendrefeu wrote:ISP won't slip. Not that seatposts always slip, but they are more likely to.
Having an S&S at the ISP does three great things:
-enables perfect seat height every time when the ISP is reconnected. Sure a piece of tape would work on a seatpost, but this method requires little or no attention be made.
-The ISP can be removed. Afterall, the bike needs to fit into a suitcase (see this: http://www.mosaiccycles.com/#!tt-1/c1ces" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false; )
-Repairability: if the ISP is damaged, just repair that bit. Just like a seatpost in modularity, without the penalties of an ISP.
For a travel bike, a great idea.
The downside of an S&S Coupler is having someone steal half your bike. It's possible: the tool for the S&S Coupler is a universal one.
all of these arguments can be made for a regular seatpost, so its hardly a superior alternative. if its such a plug and play solution, why not build the saddle clamp into the post, instead of having a mast cap in addition to the mast. you've now got two parts when once there was one.
what you seem to forget, or choose to ignore is that whilst a seatpost can be fitted with a common tool found on almost any small multi-tool, s&s couplers require an extra tool, that is far less common. also, if you somehow manage to damage either part of the coupler, the isp itself or the mast cap, the chances of finding a replacement or being able to fix it are far less likely than being able to just get a new seatpost. that point alone should discourage anybody who is serious about travelling with their bike outside of areas like portland, colorado springs or new hampshire. most bike shops carry a range of seatposts, but none carry bespoke s&s coupler, titanium seat masts.
you did mention the weight, but who cares really? its not like we are on weight weenies or anything...