[Weldangrind]

Thanks for the link and pics of the stainless panniers; they're huge! I don't think I'll pull the trigger on boxes that are that big.

To respond to your tire size question, a 130mm wide tire with a 90 sidewall ratio is 69.23mm high. A 130mm wide tire with a 70 sidewall ratio is 53.85mm high. For easy comparison, a 15 inch rim is 381mm, and a 17 inch rim is 432mm.

The 15 inch rim would be a 381mm rim + 69.23mm sidewall = 450.23mm overall.
The 17 inch rim would be a 432mm rim + 53.85mm sidewall = 485.85mm overall.

The 130/70-17 is about 35mm taller overall, which would change the seat height and the speedometer reading. The 130/90-15 would have a much softer ride, due to the tall sidewall. The choice depends on your personal preference, and local tire availability. In North America, a 130/90-15 is a little harder to find.