This is the second-generation retainer that can prevent your Brompton from opening up when you roll it with the seatpost half extended. No interference with the fender. Push it in and you are good to go. 3 versions are available, one for factory seatpost (with a flared bottom), one for non-Brompton seatpost.
Intro Video: https://www.youtube.com/shorts/h9P5TrpgW6Q
This is the second-generation retainer that can prevent your Brompton from opening up when you roll it with the seatpost half extended.
No interference with the fender. Push it in and you are good to go.
This is a must buy for users of the TPU triangle bag.
With only an additional weight of 12g, you can now carry or roll your bike with seatpost.
Two versions are available, one for factory seatpost (with a flared bottom) and the other for non-Brompton seatpost.
