Source google image: https://ae01.alicdn.com/kf/HTB1s3.Rj.l7MKJjSZFDq6yOEpXaH/Aluminum-350mm-Seat-Post-Mountain-Bike-Bicycle-Seatpost-27-2-28-6-30-8mm-bontrager-tige.jpg_640x640.jpg
Tige de selle aliexpress
Source google image: https://ae01.alicdn.com/kf/HTB1s3.Rj.l7MKJjSZFDq6yOEpXaH/Aluminum-350mm-Seat-Post-Mountain-Bike-Bicycle-Seatpost-27-2-28-6-30-8mm-bontrager-tige.jpg_640x640.jpg