Прошу модератора простить если я не туда пишу, вот что ответили итальянцы
Our kurve saddles have mobius rails, that are 7x9 mm, as indicated on our website.
Most part of the seatposts of the market are compatible with our 7x9mm carbon or Mobius rails.
Basically all those fixing the saddle from the top to the bottom, for example Thompson Masterpiece (2 volts).
The ones that are not compatible, are basically the ones fixing the saddle from the sides.
Please open the attached photo
There is 5 types of seatpost clamps represented:
Type A: Single Bolt Top-to-Bottom clamp
Type B: Twin Bolt (Frt/Rear) Top-to-Bottom clamp
Type C: Twin Bolt (Right/Left) Top-to-Bottom clamp
Type D: Side-to-Side clamp (single bolt)
Type E: Hinged Rotational Clamp
Type A, B & C are typically COMPATIBLE with 7x9mm saddle rails.
Type D & E are typically NOT compatible with 7x9mm saddle rails
However:
For type A, B & C, we do recommend you to test or get confirmation from the seatpost manufacturer that the length of the standard bolt(s) gives sufficient thread engagement when used with 7x9mm rail and that the seatpost still passes all required test/regulations. If it is not the case, longer bolts may need to be used.
For type D & E, seeing the increase usage of oversized rails in the saddle market in general (either to adapt to new materials such as carbon, or to give additional impact and/or fatigue resistance for specific usage: DH, Freeride, Heavy Weight rider…) manufacturers of this type of seatpost have started to offer optional clamps to fit those different dimensions. Please inquire with your selected seatpost supplier to know if they do offer this option.
7x9mm%20rail%20compatibility.jpg
Вообщем муки выбора на ровном месте, к тому же нужна версия с оффсетом


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жалко я своими 86 кг тоже наверное прижму его