John,I think the brace bolts are the same size,but the mounting holes are lower on the fork leg on the Thrux,to keep the original fender closer to the 18' rim.My brace bolts are higher than the widest part of my tire [110-80/18] and my fender can be mounted/dismounted without removing the wheel.Your lugs are probably 1/2" lower than a Bonnie and your new rim is 1/2" lower than stock,so it should be a wash.Do you have a 17" fender picked out? I mounted a Honda CM400 fender under my brace to get closer to the tire.Needs some finish work and paint,but seems to fit pretty good.
[ This message was edited by: rodburner on 2007-01-17 11:33 ]

[ This message was edited by: rodburner on 2007-01-17 11:33 ]