In theory a used car should be more valuable with the large wheel option but the lease companies don't really take that into account. Your tax benefit is giving you the saving, not the lease company increasing the end of term valuational.
I think you would need to return the car with some wheels on it
The £2,100 wheel option is obviously the price over and above the price of the standard wheels/tyres. If you purchased the car with standard wheels and then purchased the upgraded wheels/tyres in addition, that would cost you north of £3.5k.