Upgrade RST Gila forks

Hi Folks,
what would be a suitable upgrade to an air fork with 120-140mm travel from the existing RST Gila Plus.
I'm unsure about the tech side as in what size the headset is etc so wondered if you could steer me in the right direction, any help much appreciated.
what would be a suitable upgrade to an air fork with 120-140mm travel from the existing RST Gila Plus.
I'm unsure about the tech side as in what size the headset is etc so wondered if you could steer me in the right direction, any help much appreciated.
0
Posts
Reading the headset standards on Parktools would be a good start.
Parktools :?:SheldonBrown
MTB Scotland youtube channel