I would imagine a place where you can purchase bike parts, for your bike, so your bike is in tip top ship, they can also tune your bike if you didn't aquire the knowledge to do so yourself.
It's 2018 and I'm another gent looking for a 30.9mm Pivotal seatpost because BMX seats look dank on downhill bikes. All the old links in the thread are defunct.
Anyone have a line on a 30.9 mm Pivotal seatpost? TIA.