The Cinch post comes in 27.2 and 30.9 diameters in three lengths, 280, 340 and 380 mm and reflects two decades of experience working with titanium. Adjusted with a single 5-mm wrench they are a beautiful and simple respite from other cumbersome systems that require multiple wrenches. Moots offers straight and layback versions. Price: $340 More:moots.com