<p><br/></p><p><kse:widget data-widget-type="customText" id="24641171" type="relation"></kse:widget></p><p><br/></p><br/><p><div class="detailmodule_media"><div class="video-container-5000308674135"><div class="detail-video" id="5000308674135" data-previewurl="https://ae01.alicdn.com/kf/S724e7c96bca4450885929a7f64556476S.jpg"></div></div></div></p><br/><p><br/></p><p><span style="font-size:20px">Product Name: Bicycle Aluminum Alloy Seat Tube</span></p><p><span style="font-size:20px">Material: AL6061 aluminum alloy</span></p><p><span style="font-size:20px">Color: Anodized Sandblasting Black/Anodized Sandblasting Silver</span></p><p><span style="font-size:20px">Diameter: 25.4/27.2/30.8/31.6mm</span></p><p><span style="font-size:20px">Length: 190/300/350mm</span></p><p><span style="font-size:20px">Features: High strength aluminum alloy material, anodized sandblasting process, good quality, high strength</span></p><p><br/><br/></p><p><span style="font-size:20px">Seat diameter selection</span></p><p><span style="font-size:20px">At present, the common sizes of seat rods on the market include 25.4/27.2/28.6/30.4/30.8/31.6/33.9mm, and the diameter of the seat rod corresponds to the installation diameter of the frame. It is not suitable to measure the diameter of the seat rod too large or too small. When measuring the diameter of the seat rod, a high-precision vernier caliper must be used for accuracy. At the same time, due to the lower limit principle of accuracy in the production process of the diameter of the seat rod, the actual measurement data may be 0.1-0.2mm smaller than the marked one. For example, for the seat rod marked 27.2, the actual measurement may be between 27.0-27.2mm.</span></p><p><br/></p><p><span style="font-size:20px">Method 1:</span></p><p><span style="font-size:20px">Check if there are specification markings on the safety line position of the seat pole, some with laser markings, and also the steel seal of the seat pole itself.</span></p><p><span style="font-size:20px">(Some seats may be difficult to see clearly due to wear and tear)</span></p><p><br/></p><p><span style="font-size:20px">Method 2:</span></p><p><span style="font-size:20px">Measure the outer diameter of the seat with a vernier caliper</span></p><p><br/></p><p><span style="font-size:20px">Method 3:</span></p><p><span style="font-size:20px">Measure the inner diameter of the frame mounting seat with a vernier caliper</span></p><p><br/></p><p><span style="font-size:20px">Measurement of Sitting Pole Length:</span></p><p><span style="font-size:20px">Distance from the lower end of the seat to the center of the clamp (not the entire length)</span></p><p><br/></p><p></p><p><br/></p><br/>