I have run mack studs on a phazer, woodys on a vmax, and extreme max on both my vipers. Liked them all and had no problems with any of them. I am a trail, river runner. My wife is running a 1" track with a predrilled for 144. I have 120 with single and double backers down the middle and it hooks great (using the extreme max studs). And i just saw port yamaha has them on close out for $1 stud, and .30 cents for round single, and .60 cents for flat doubles. They also have a lot of info on them at their web site. Just some info. CCC