Replacement Genuine Headset Bearings for Cervelo Bikes Bearings Upper Bearing – MR040 (30.2 x 41 x 7.1 – 36/45). Lower Bearing – MR019 (40 x 51.8 x 7.5 – 36/45). Cervelo Compatible Bikes C3 & C5. R2/R3/R5 (2018-2020). R5 (2021).
Best Price: £24.99 from Merlin Cycles