Note: The DropperBlock and Wolf Tooth Valais are not compatible with our Ripsey V2 seat bag. You'll need a Ripsey V2 shim set instead.
Finally, folks with odd-sized dropper posts have a way to attach a seat bag! We've designed our DropperBlock to mount on droppers with 22mm or 28mm stanchions, providing a secure mounting point while protecting the stanchion from wear and the wiper seal from damage.
The DropperBlock is made of 3D printed nylon and comes in two parts which bolt together to create a perfect mounting surface for our Ripsey Seat Bag or any seat bag with a 1" wide strap.
Currently we're only producing the DropperBlock in two diameters - 22mm and 28mm. If your dropper has a 25mm or 26mm stanchion, you'll need a Wolf Tooth Valais instead. We have a list of some common dropper posts and their diameters below:
| Brand
|
Stanchions |
| 9point8 |
All Fall Line droppers have 25mm stanchions |
| Bike Yoke |
30.9 and 31.6 posts use a 25mm stanchion. 34.9 posts use a 28mm |
| Crank Brothers |
All Highline droppers use a 26mm stanchion, except for 27.2mm posts which use a 22mm stanchion |
| Fox |
All Transfer posts use 26mm stanchions |
| One Up |
All 30.9, 31.6 and 34.9 posts use a 26mm stanchion. 27.2mm posts use a 22m stanchion |
| PNW |
Ridge and Cascade 125mm use a 25mm stanchion. All others use 26mm, except for 27.2mm posts |
| RaceFace |
Turbine R is 26mm, older Turbine posts were 25mm |
| Rockshox |
All posts are 25mm |
| SDG |
Tellis dropper has a 25mm stanchion |
| TranzX |
| Kitsuma 27.2 - 22mm stanchion |
| Skyline 30.9/31.6 - 24.4mm stanchion (the 25mm Valais works)
|
| Kitsuma 30.9/31.6 - 26mm stanchion
|
| All 34.9 posts - 28mm stanchion
|
| JD-YSP18 - 24.4mm stanchion (the 25mm Valais works)
|
|
That list is current as of November 2023. If your post isn't on that list, you'll have to measure it with calipers (or take it to your local bike shop and have them do it). Make sure to measure the stanchion (upper, smaller tube of the post). And let us know the results so we can add it to our list!
