Members who have donated towards server costs
Join Date: Nov 2007
Location: Chandler, Arizona
Replacing the front tire with a larger one may help handling, and it seems to have been done enough to be proven safe. There are 2 reasons I stick to the stock size tire. One is simple cosmetics. I do not like fat tires in the front. I would actually prefer a skinny 21" tire, like the Suzuki 800 intruder and Vulcan 800A had. The other reason is that a larger tire is heavier and has more rotating mass. Proper balancing becomes even more important. The larger tire will have more centrifugal force, which may make it harder to turn.
But as for the rear tire, I believe it is already too big, I actually would like to go with a smaller (narrower) rear tire of about the same outside diameter, but on a 17" rim. The Vulcan 750 has the same size stock rear tire as my '85 Goldwing, which is much bigger and heavier and has a higher load capacity. It is also designed to be ridden 2 up. And unlike the Vulcan, you can't put a larger tire on it, because it won't fit. The stock 150/90-15 just barely fits in the swingarm. And the '85 Goldwing is not an "older" bike than the Vulcan. The GL1200 came out in 1984. The VN700 came out in '85. It's just my opinion, which makes it pretty much worthless, but I believe they put that huge rear tire on the Vulcan strictly for looks. I think a 130/90-17 would have been a much better choice. That's what my '97 Road King has, and it rides fine. It does not handle like a Vulcan 750, but then neither does the Goldwing. You cannot put a wider rear tire on it either, because of the belt drive. The belt comes very close to the tire.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike