New tyre Time

[fazersharp]

Im currently on S22s, no problems, good grip, ridden on track, decent wear. S22s have been superceeded but still available so you might be able to find a good price on them

Actually I have just been looking at the S22 - like you say a bit cheaper than the s23 and are avalible.
where do you get yours ( I know you do the Donington track days so that is not far from me either )