OD2 Mountain bike is a different headset and takes different upper bearing from this kit.
Create idea 2pcs Bicycle Headset Bearings MR136 & MR137 Kit Compatible with Giant OD2 (Overdrive 2 Road) Bikes, 32.8x41.8x6mm/37x46.9x7mm
Giant FSA OD2 OverDrive 2 Road Bike Tapered Headset 1-1/4" to 1-1/2"
GIANT OD2 ROAD ( OVERDRIVE 2 ) REPLACEMENT TAPERED HEADSET BEARINGS MR136 MR137
GIANT OD2 MTB ( OVERDRIVE 2 ) REPLACEMENT TAPERED HEADSET BEARINGS MR136 ACB518K
ACEOFFIX Bike Headset Expander,Plug Stem,Top Cap Cover for 31.8mm,1 1/4",Steerer Over Drive,Carbon Fork Compressor(GIANT OD2)
Giant OD2 carbon Headset Spacer Kit - 5 Spacers - 32.5mm In Total
