You can find all the spare parts and components you need for your bike at Escapa.
Like the Miche MTB XM TT 9-Speed Outer 4-Arm 104/64 BCD Chainring
FEATURES:
104/64 mm internal diameter between holes (BCD)
4-hole.
Material: Ergal 7075, CNC-machined, HT-anodized, and laser-etched.
Compatible with Shimano XTR (M985-M980-M970) and XT (M780-M785-M770)