Tyres, then wheels. Once riding I don't think you could tell the difference between hubs. Saddle, but that depends on position. Good bar tape makes a big difference too. After that it's all incremental. Chainrings and cogs - cheep pressed steel vs proper forged and cnc items add an overall feeling of smoothness imo.
Tyres, then wheels. Once riding I don't think you could tell the difference between hubs. Saddle, but that depends on position. Good bar tape makes a big difference too. After that it's all incremental. Chainrings and cogs - cheep pressed steel vs proper forged and cnc items add an overall feeling of smoothness imo.