Bike Seatpost Aluminum Alloy 300mm Seat Post 25.4 27.2 28.6 30.4 30.8 31.6mm Bicycle Seat Tube

Seat Post 25.4 27.2 28.6 30.4 31.6 300mm 450mm Seat Tube Seatpost MTB BMX Road Mountain Bike Road Bicycle Aluminum Alloy Adjustable Folding Bike Seat PostProduct Name: Bike SeatpostMeterial: Aluminum AlloyUsed For: MTB Bike Bicycle Road BikeFeature: DurableSurface: Polishing SandblastingColor: Matte BlackSuitable For: 25.4mm/27.2mm/28.6mm/30.4mm/31.6mm DIAMETERLength: 300mm/450mmBike Frame: Mountain Bike/Road Bike/E-bike/Folding Bike/Janpan Bike/BMXMeasurement Methods:25.4mm in diameter and 8cm in circumference27.2mm in diameter and 8.5cm in circumference28.6mm in diameter and 9cm in circumference30.4mm in diameter and 9.7cm in circumference31.6mm in diameter and 10cm in circumferenceFeatures:1. Double track seat tube: Suitable for bow saddle.2. Clear scale: Laser technology printing, clear and smooth easy to adjust the length of the seat rod.3. Convertible Angle: According to their own requirements, adjust and change the Angle of the saddle, get a good comfort.4. Clamp bow seat rod head: Use a high strength screw to lock and fix, easy to adjust the Angle.Selection method of seat tube size:1. Pull out the old seat rod and see if there is a steel mark at the warning line under the seat rod (such as 27.2 or 30.4, etc.). The number is the diameter.2. Wrap the strip around the bike tube for a week, divide the two dimensions by 3.14 by the calculator, and then select the option close to the data size.3. Measure the diameter of the seat rod directly with the caliper.4. Directly measure the inner diameter of the frame tube without the seat tube.Note:The seat tube should be purchased according to the size. It must be suitable for installation.Since this product is a metal commodity, it is normal to have slight paint blemish during transportation, but only a few.