yea there is a good bit of difference but with the more speed you have to think what type of bike is it going to be on, there is a big difference between the weight of say a GS1200 and that of a Tenere/XTR.

As for the tubes/tubeless i dont think there is a difference. Try mandp.co.uk thats where i got got a set for a good price.+fast deliverly

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Plough on