What is the standard seatpost size?

What is the standard seatpost size?

Seatpost diameters generally range from 22 mm to 35 mm in 0.2 mm increments. The most common size is 27.2 mm (1.07 in) for most bikes, especially for the higher-quality models. BMX bikes commonly use 25.4 seatposts. In some modern bikes with thicker alloy or carbon tubing, larger diameters such as 30.9 mm are used.

What length seatpost do I need?

a) Seatpost should end at least 25 millimeters below the lower part of the horizontal tube weld to the seat tube. b) Total inserted length should be at least 90 mm from the top end of the seat tube.

Are all seat posts the same length?

Seatposts also vary in length. A shorter seatpost will typically be lighter in weight but less adjustable. Mountain bikes tend to have longer seatposts.

How do you measure a bike tube seat?

Seat tube length is measured from either the centre of the bottom bracket to where the top tube and seat tube meet (Centre-Centre or C-C) or to the top of the seat tube (Centre-Top or C-T).