New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
a front--http://www.ebay.com/itm/MOTO-GUZZI-V1100-V11-V-11-SPORT-01-LEMANS-FRONT-WHEEL-RIM-SCRATCHED-2001-/271567489524?pt=Motorcycles_Parts_Accessories&hash=item3f3aaf09f4&vxp=mtra rear---http://www.ebay.com/itm/Moto-Guzzi-V10-Centauro-1997-Brembo-Rear-Wheel-Rim-17-x-4-5-/291330293581?pt=Motorcycles_Parts_Accessories&hash=item43d4a37f4d&vxp=mtr Cali will handle wonderful, just need fitting. Not that bad of a job.
Mags on a Vintage? that would be UGLY!
Your CalVin's wheels are easily and safely convertible to tubeless and at very low cost. I have done the wheels on both my California Stones (2003 and 2004) and they are holding air just fine after over 2 years with very little "topping off" required. Many articles on line re "How to" or PM me.ralph