Sorry I was not dissing your LBS, I was saying that the price appear to be normal for a London bicycle shop, especially after 8 months of commuting.
It's still a lots cheaper than the train fare, congestion charge, or even buses.
The Marathon Plus tyres you bought will definitely last a lots longer than the standard tyres that come with your bicycle, there's a reason why it's popular with round-the-world touring cyclists.
Checking chain wear every 3-4 months also help to ensure that you can replace the chain before it wear out the cassette/chainring.
Sorry I was not dissing your LBS, I was saying that the price appear to be normal for a London bicycle shop, especially after 8 months of commuting.
It's still a lots cheaper than the train fare, congestion charge, or even buses.
The Marathon Plus tyres you bought will definitely last a lots longer than the standard tyres that come with your bicycle, there's a reason why it's popular with round-the-world touring cyclists.
Checking chain wear every 3-4 months also help to ensure that you can replace the chain before it wear out the cassette/chainring.