Seatpost Shim 34.9 to 30.9 for GSD Gen 2 $15.00 Default Title - $15.00 Quantity This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. If you want to allow your GSD Gen 2 seatpost to go as low as possible, this will help. The shim allows you to remove the lower half of your telescoping seat post. Reviews Reviews Customer Reviews No reviews yet Write a review