Tune Di2 Seatpost battery holder bike packing 2x cross rear lacing

2x cross rear lacing

It's design is different to typical  dropper posts in the attempt to minimize seat post weight

predictable cornering but with a fast centre tread for that extra bit of speed

these are the real deal

Tune Di2 Seatpost battery holder bike packing 2x cross rear lacingEnergie Suitable for bikes with Shimano's electronic Di2 groupset, either MTB or road. A very tidy solution and light solution for mounting the internal battery cleanly and safely in the seatpost. It uses the similar sticky material found on the Tune Gum Gum headset expander, just by tightening the bolts compresses the silicone material pressing it outwards and gripping onto the inside of your seat post it's complete safe for light carbon posts. Easy