Trek domane 4.5 headset bearings
I'm trying to work out which lower headset bearing to order for my 2013 Trek Domane 4.5. I have contacted the shop where I bought it and they quoted me £110 for a bearing set which seems outrageous. The headset is FSA. Bearing diameter 40mm inside, 51mm outside and 6mm deep as far as I can measure with chamfers outside top and inside bottom. Can anyone supply a part number and where to get one from?