What To Look For When Choosing A Seat Tube Diameter
Seat tube diameter is a huge influence on general ride comfort, too. If you are seated and rolling along on even terrain or climbing, a great deal of terrain compliance results from your seat tube’s flexibility. The larger your seat tube diameter is, the harsher the ride quality will be. This is the reason why 27.2mm seat tubes have remained in fashion with hardtail mountain bike designers.
This seat tube diameter issue, in as much as it is related to ride comfort, adds complexity to the question of dropper seat post compatibility. There is a trend towards a minimal seat tube diameter of 30.9mm, due to dropper seat posts becoming more popular, even with weight-obsessed cross-country riders.
Seat tube diameter is a considerable specification decision for any hardtail rider. If you are going to roll big mileage and prefer a fixed seat post to save weight, the compliance of a 27.2mm tube diameter frame is important. Prefer having a more balanced riding experience with some fun on the descents? Then you’d need either a 30.9mm or 31.6mm frame to accommodate most of the contemporary dropper seat post configurations.