What happens if you put a 19inch wheel in an ‘r’

[xantamisch]

Thinking of running a set of ‘s’ wheels in an ‘r’ - 19 inch / 17inch
Would this affect the Speedo / trip?

Thanks

 

[Rasher]

Yes, you need some modified ABD rings, some bod on ADV Rider makes these, can do them for different wheel sizes / gearing etc.