Here are all the options parts for the Xray X4F
Reference 06303142-O
Brand: XRAY
ALU SHIM 3x5x0.5MM - ORANGE (10) - 303142-O
Reference 06305776
Brand: XRAY
OFFSET SPUR GEAR 76T / 48 - HARD - 305776
Reference 06305874
Brand: XRAY
OFFSET SPUR GEAR 104T / 64 - 305874
Reference 06305876
Brand: XRAY
OFFSET SPUR GEAR 106T / 64 - 305876
Reference 06305918
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 18T / 48 - 305918
Reference 06305925
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 25T / 48 - 305925
Reference 06305927
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 27T / 48 - 305927
Reference 06305929
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 29T / 48 - 305929
Reference 06305934
Brand: XRAY
NARROW ALU PINION GEAR - HARD COATED 34T / 48 - 305934
Reference 06308274
Brand: XRAY
XRAY 4S SPRING-SET C=2.3 (2) - 308274
Reference 06308308-O
Brand: XRAY
ULP ALU SHOCK ABSORBER-SET - ORANGE (2) - 308308-O
Reference 06309612
Brand: XRAY
TIRES XXT-M W/O BELT FOR LOW GRIP ASPHALT (2) - 309612