If the GRiSO Bars are the same as the Stelvio (diameter of the Clamping area that is), then they're not the same as the 'Industry Standard' FatBars. They're a bit thinner, so Renthal/Magura (not sure about Pro Taper) Bars won't fit the Guzzi Clamps. Do you have a Vernier Caliper/Micrometer to check the GRiSO Bars diameter?
I'll have a dig and find the actual dimensions . . .
The original Stelvio Bars are approx 0.6 ~ 0.7mm thinner than the Renthal and Magura FatBars, which are 28.6mm at the clamping area. You could probably fit them, and force the Clamps down tight, but I wouldn't . . .
EDIT. Just checked, Pro-Taper Bars are the same as the Renthal and Magura, 28.6mm (1 1/8").
I live away from the city, and avoid riding in traffic. Being retired, I need not deal with such things. If I need to go into heavy traffic, I'll have a cage around me.
But that's just me, being a crusty olde pharte.
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Posts : 604 Join date : 2013-12-23
Subject: Re: Pro Taper handlebars Sat Jul 10, 2021 7:10 pm
I ordered the bars on Friday, got them before noon on Saturday with free shipping. Switched the mirrors to black ones from a V7 II as I had them in a box. Bars are a bit lower and every bit as wide.[You must be registered and logged in to see this image.]