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Don't get a 130 front. The first number is the width of the tire in mm, the second is called the aspect ratio, which means the height of the tire in percentage of width, so for example, a 130/80 tire would be 104mm taller than the rim, while a 100/80 would be 80. If you could find a 110/70 for the front, that would be all right, too.
The 120/90 in the rear should be a bit taller, which might lower the RPM, but honestly, I'd try to find as close as possible.
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