Yes, the travel of the 2025+ Domain C1 can be changed by replacing the air shaft.
11.4018.111.040 FORK SPRING DEBONAIR SHAFT - (INCLUDES AIR SHAFT AND BUMPERS) 150MM- 27/29 (38MM) - DOMAIN C1+ (2025+)
11.4018.111.041 FORK SPRING DEBONAIR SHAFT - (INCLUDES AIR SHAFT AND BUMPERS) 160MM- 27/29 (38MM) - DOMAIN C1+ (2025+)
11.4018.111.042 FORK SPRING DEBONAIR SHAFT - (INCLUDES AIR SHAFT AND BUMPERS) 170MM- 27/29 (38MM) - DOMAIN C1+ (2025+)
11.4018.111.043 FORK SPRING DEBONAIR SHAFT - (INCLUDES AIR SHAFT AND BUMPERS) 180MM- 27/29 (38MM) - DOMAIN C1+ (2025+)
RockShox service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about RockShox and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.
https://www.sram.com/en/rockshox/campaigns/rockshox-rider-support