width for gncc

[UK450R]

What width A-arms/Axel would you guy´s recomend for a 450R doing gncc type races.

I have been looking at pics of Balance/Yokley etc bikes, and they look to me to be running slighty wider A-arms (+1?), but with axle at standard width - is this correct???

If not, what would you recomend, go wider frount/back, or leave as standard?

[rowlrag]

We run 46 inches wide outside to outside of the fronts. The 450 could use +1 arms with a 4-1 offset wheel or you could get by with 3-2 wheels. I'd like to see what +1 and 3-2 wheel measures.