Questions? 1-888-354-BIKE email

Rock The Bike

Is Your Fender Blender Pro Seatpost Sliding Poorly?

This bulletin addresses issues with seat post sliding performance. A correctly functioning seat post should be easy to slide up and down with one hand. If there are positions where it gets stuck, please see the three sections below.

1. Check which bolt you have: Check if the anti-rotate bolt behind the seat post is a domed button-head type. We’ve found that this design of bolt can cause issues with sliding performance. Even if your seatpost is sliding fine, we’d like to send you the replacement.

Get a replacement:Contact us and we will send you a replacement that doesn’t scratch the seatpost slot. Contact info below.

2. Deal with existing scratches:Check for scratching and burrs around the groove on the back of the seat post. You may notice that the seat post gets stuck as it slides into the frame in specific areas where the seat post is heavily marked or scratched.

Fix: Requires a sanding tool such as emery board, file, or sandpaper. If you would like us to send you one, please contact us, info below.

  • Remove the seat post from the bike. The hex key that comes with the bike will be needed to remove the anti rotate bolt.
  • Sand around and in the groove to remove sharp edges and burrs. Avoid breathing the dust. For the best sliding performance, you must take the rough spots all the way down. If your seatpost is really chewed up and you would prefer a fresh start, contact us for a new post!
  • Immediately clean up any dust with a wet paper towel and wash your hands after completing the process.
  • Repeat sanding as necessary.

3. Chatter: Seat Post chatters when sliding down and needs precise manual guidance in order to slide; especially when the seat is extended to a higher number, like 9 or 10.

Fix: Lubricate the seat post with a silicone-based grease. If you would like us to send you some, please contact us, info below. How to apply the grease

  • Raise the seat post all the way up and clamp in place
  • Apply the lubricant onto the post near the top, middle, and bottom to form 3 rings, about the size of a rubber bands
  • Spread the lubricant over the whole seat post with a small piece of paper towel, napkin or rag (approx the size of a credit card)
  • Slide the seat all the way up and down five times
  • Using a fresh paper towel, wipe off the excess lubricant

If these or other performance issues are happening to your Fender Blender Pro, please contact us for support: 1-(888) 354-2453 techsupport@rockthebike.com