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With a core diameter of 27.2mm the USE Shims (For 27.2mm SX Posts) is designed for use with the larger diameter Alien Aluminium and Carbon posts and any other post with this diameter. Available in 27.6 to 31.8mm outer diameters in 0.2mm increments as well as 30.9mm.
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The best selling U.S.E. suspension model giving 52mm of quality travel at a bargain price. The USE SX Suspension Seat Post is an easy and reliable way to improve rear-end comfort suitable for road or trail use. (See U.S.E. Shims description for full sizing options).
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With a core diameter of 25.0mm the USE Shims (For 25.0mm XCR Posts) is for use with the new Alien ShokPosts the small diameter Alien Aluminium and Carbon posts or older U.S.E. posts. Available in 25.8-31.8mm outer diameters in 0.2mm increments as well as 30.9mm.