Syncros takes an interesting approach in merely machining basic aluminum tubing, billet stock, and extrusions to derive a highly adjustable and superior seatpost. The Syncros clamp system uses two bolts to hold down the upper clamp piece which also cinches the lower clamp piece and the saddle in placethat. The two bolt tie-down system is becoming popular. The upper clamp piece is made by machining 2" by 2" piece of extruded aluminum. The extrusion is about 1/2" thick with a 7/10ths by 3/10th hollow running through it. Excess areas surrounding the hollow are cut away to make an arm on each side with a slot milled through them so they become two .2" wide arms separated by a .21" groove between them at the center of each side. A hole is drilled through the arms that will accommodate a brass rod. The rod is .58" long and .3" in diameter with a hole drilled through the middle of its side, tapped with threads. These rods on each side will anchor the bolt that rises from the head piece to hold the clamps in place. Added holes are drilled through bottom to top to reduce the weight of the piece to its 36.5 grams. The lower clamp piece is again extruded in a half-round shape with a hollow center. On the top a groove is milled for the 7mm saddle rails leaving 1.1" of contact. Added milling is performed to the top to reduce the pieces' weight to just 18.5 grams. The head piece is machined from billet aluminum. An inverted hemispherical top makes the cradle for the clamp pieces to lie and be restrained against. At each end of the head piece is a protrusion with a slightly oblong hole drilled for the tie-down bolt. The hole has a cupped perimeter on the lower side to accommodate a sintered brass washer which relieves some of the friction in tightening the bolts upward into the brass anchors. The bolts are made of cadmium plated steel with 5mm x 1mm threads, are 35mm long have a 4mm hex fitting and weigh 6 grams each. The head piece is a mechanically simple work of amazingly intricate machining. The seat mast tubing is made from 7075-T78 aluminum tubing, with the head piece pressed and bonded in it to a depth of 1 inch. The weight of a 26.6mm Syncros Hardcore 330 post is 222 grams. The Syncros 330 post is made in Canada, and available in 26.0mm, 26.2mm, 26.4mm, 26.6mm, 26.8mm, 27.0mm, 27.2mm and 27.4mm It is also available in oversize dimensions - 28.0mm, 28.2mm, 28.4mm, 28.6mm, 29.2mm, 29.4mm, 29.6mm, 29.8mm, 30.0mm, 30.2mm, 30.4mm, 30.6mm, 30.8mm, 31.0mm, 31.2mm, 31.4mm, 31.6mm, and 31.8mm for $10 more. Made using Black anodized tubing with Silver clamp pieces.
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This is the same post as the Hardcore 330 above, however the tubing section has been cut longer from the outset, making a longer seatpost. The weight of a 27.2mm Hardcore 425 post is 282.5 grams. The Syncros 425 post is made in Canada, and available in, 26.2mm, 26.4mm, 26.6mm, 26.8mm, 27.0mm, 27.2mm and 27.4mm It is also available in oversize dimensions - 28.0mm, 28.2mm, 28.4mm, 28.6mm, 29.2mm, 29.4mm, 29.6mm, 29.8mm, 30.0mm, 30.2mm, 30.4mm, 30.6mm, 30.8mm, 31.0mm, 31.2mm, 31.4mm, 31.6mm, and 31.8mm for $10 more.
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The Hardcore 330 is also available with the seat mast tube made of Titanium 3Al-2.5V tubing which reduces the weight of the post slightly. This is the only Ti post that has a a lathe turned mast tube for a perfect fit. Known as the Pro Series seatpost in all other respects it is identical to the 330 aluminum model. With the clamp perpendicular to the tubing section, the center of rail to end of tube length is 325mm. The weight of a 26.8mm Syncros Ti Pro Post 330 post is 179.5 grams. The Syncros Ti 230 post is available in 26.8mm, 27.0mm, 27.2mm, and 27.4mm sizes. It is also available in three oversized diameters at a slightly greater cost. Those diameters are 28.6mm, 29.4mm, 31.6mm, and 31.8mm.
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The Hardcore post is also available in a road racing version, having a shorter seat post mast. The same head piece and clamp system are mounted on a seat mast tube that has a nominal length of 225mm. There is a smaller size range for this post. Again this post has a Black mast and Silver clamp section. With the clamp perpendicular to the tubing section, the center of rail to end of tube length is 223mm. The weight of a 27.2mm Syncros Altura 225 post is 180 grams. The Syncros Altura 225 post is available in, 26.0mm, 26.2mm, 26.4mm, 26.6mm, 26.8mm, 27.0mm, 27.2mm and 27.4mm sizes.
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The Altura 225 is also available with the seat mast tube made of Titanium 3Al-2.5V tubing which reduces the weight of the post slightly. In all other respects this identical to the 225 aluminum model. With the clamp perpendicular to the tubing section, the center of rail to end of tube length is 223mm. The weight of a 27.2mm Syncros Ti Altura 225 post is 158.5 grams. The Syncros Ti Altura 225 post is available in 26.8mm, 27.0mm, and 27.2mm sizes.
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