Upanbike Bike Seat Post φ 25.4/27.2/28.6/30.9/31.6mm, Length 13.8inch (350mm) Aluminium Alloy Bicycle Seatpost (φ 30.4mm)

Features:
Micro adjusting clamp: the clamp is adjustable for the saddle tilt angle.
A free hexagon wrench tool is attached in the package.

Specifications:
Material:6061 T6 Aluminum alloy
Color:Matte black
Weight:about 300g~360g (0.66lbs~0.79lbs)
Length:13.8inch ( 350mm)
Tube thickness:2.5mm,high strength.
Tube outer diameter:

25.4mm,27.2mm,28.6mm,30.4mm,30.9mm,31.6mm.
Important note: the real measurement of the seatpost diameter is a little smaller than the number marks on it. e.g.:25.4mm one may measure about 25.0~25.2mm only.

Replacement seatpost for most bikes, mountain bike seat posts, road bike seat posts, BMX bike seat posts...

Installation Tips:
If you find it hard to turn the fixing bolt at the first time, please insert the post into bike frame hole and lock the seatpost clamp, then you can turn the bolt easily with a hexagon screwdriver. After the bolt is moved at first time, it can be moved easily afterwards.

Please do measure and confirm the exact post diameter that you need for your bike. Otherwise, you may find it too small or too large for your bike frame seat post hole, then you'll have to spend more time returning it. Thank you for your support.

How to measure and confirm the diameter that you need
There are two ways to confirm the diameter that you exactly need.

1. Check the diameter mark on your old seat post, normally there's a size mark on your old seat post. For example, if there's a mark " Φ25.4" on your old seat post, then you can buy a new 25.4mm seat post.
2. If you have a vernier caliper, measure your old seatpost diameter or measure the inner diameter of the seatpost hole, then buy a similar size new seat post. For example, if the measurement is about 27.1mm, then select a 27.2mm seat post will do.
3. If you don't have a vernier caliper, use a small stick to measure the inner diameter of the seat post hole (see the picture showing)