Squeezing a 160 tyre onto the rear, or a 120 tyre onto the front, of an NSR will actually lessen the "contact patch" rather than increase it, consequently giving you LESS grip! You will only gain grip psychologically down the pub!
To fit 120/60x17 and 160/60x17 tyres to the NSR you need to fit HRC F3 (effectively HRC RS250) wheels at 3.5" and/or 5.25" (or 5.5") respectively.
A 120 section tyre can also be fitted with some of the USD conversions, most notably the RVF400 NC35 and HRC RS250 USD front-ends as they utilise the wider wheel.
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Andy.
NSR-WORLD.COM
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