Mash / Cinelli Vigorelli

Considering buying £600 frameset

Won't spend £15 on a new seatpost

Like I'm gonna stick a 15 quid seat post on that

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And like its gonna be £600 quid

You're right, Histogram frameset RRP is £899 so it'll probably be more.

Compliance, people have realised 31.6 is overkill for a seatpost.

I reckon they've realised no one is going to use a bro pro on a velodrome so may as well have bottle mounts

Much better, 27.2 is a good move as it give you a lots more choices of seatpost.

Same reason why BMW went for 27.2 in the V3 Gangsta (and it doesn't look out of proportion).

Spend to much time geeking out over other stuff to know what compliance is. Does this basically mean 31.6 is too stiff?

When everything else is oversized...especially the HT...why go down on the ST thickness? Will look weird.

Someone put 27.2 on a V1 Gangsta, it doesn't make any difference visually;

Does this basically mean 31.6 is too stiff?

Normally I'd says yes, but @mdcc_tester debunked this, especially when you can just change the tyres and pressure to make it more comfortable.

For a given wall thickness, a 31.6mm post will be stiffer than a 27.2mm seatpost. Whether it's too stiff, or if the difference is at all noticeable is another matter.

Switching to a carbon post from alu made a massively noticeable difference to my undercarriage for longer rides. I'm sure the same is true again and that there's some basic physics that supports that. Guessing stiffness increase will be proportional to R squared? Where's tester when you need him?

Woah there, the mash bolt is coming back!? What's the source, instagram?
I always regretted getting a pink Vig over this, a chance to make amends!

Interesting that they chose to put bottle cage mounts on the sloping top tube model. It will have mudguard mounts next and @umop3pisdn will be buying one for audax purposes.

and rack mount

Ha! Id genuinely buy a parallax with clearance for 28's with mudguard and bottle mounts. classic British winter training bike but with a bit of 'fixie cool' appeal.

if chas was from newcastle

I've already got a touring Vigorelli

Guessing stiffness increase will be proportional to R squared? Where's tester when you need him?

For a right circular cylinder, bending stiffness is proportional to r⁴. For a tube that becomes r₁⁴-r₂⁴ where r₁ is the outside radius and r₂ is the bore radius. That means that if you simply scale up a tube from 27.2 to 31.6, keeping the ratio of diameter to wall thickness constant, it gets to be about 80% stiffer. Of course, there would be no point in doing this, the whole point of oversized tubes is to increase stiffness without using more material, so you cut the wall thickness if you can. In general, nobody was complaining about a lack of stiffness from 27.2mm seat posts for the past 80 or so years, so the move to a new 'standard' of 31.6mm has been driven by the need to fit it into a large diameter seat tube, not any actual need to stiffen the post itself. Oversize seat posts are generally heavier than their 27.2mm brethren because it turns out that if you try to make the same amount of material stretch to the larger diameter the walls get thin enough to be a problem, especially where the bending load peaks at the top of the seat tube. As a result, the seat post gets to be very stiff, and people start blaming it for discomfort, when what they should be looking at, in approximately this order, is positioning, tyre selection/pressure and saddle choice. Oh, and in a great many cases, rider avoirdupois. I was never in the least bit bothered about riding 18mm tubulars at 140psi with an unpadded saddle back when I was not much over 10st. :-)

This was mine. Also shimmed my current bolt(page 120) for a 27.2mm post.

Nice to see both of the companies follow my example. :)

Currently rolling to and from uni on this

go on, paint the whole bike!

https://www.lfgss.com/conversations/280796/#comment12752457

got this frame set for sale if anyone is into the earliest mash stuff

Joining the club. You've probably seen this around internetz.
My new Parallax (thanks @Aches).

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Aye good lookin', I saw that earlier and thought it looked familiar

Smart build, looks like it fits you better to.