I had a stock rear Winzip disc brake on my Sun SX-x3 trike which wasn't worth it's weight in crap! I changed to the Avid BB7 MTN and it's a world of difference! The one thing I liked about the Winzip was the look of the rotor because the holes drilled all over it.

If I were to change back to the other rotor is it going to effect the way the Avid stops, or shorten the life of the pads from all of the holes?

Thanks,
Mr Gnome

Assuming the same mounting method, rotors of the same diameter are compatible. BB7 uses 160, 185, and 203mm rotors (the latter two with adapters). What's the diameter of the old rotor?

The hole pattern shouldn't significantly add wear to your pads. It's a balance of higher friction around the edges but less where over the open spaces. Avid makes a rotor that is heavily drilled out called the Clean Sweep. I haven't used them, but reports have been good. As JiveTurkey said, for if it will fit depends on rotor diameter and with or without adapters.

In addition to what's been said, some rotors differ in braking track width, for example some Shimano rotors run narrower and won't work well; any substitute rotor should be at least as wide in braking track as the stock rotor. Did yours come with the Avid roundagon rotors?

Both are 160's and it looks to be as heavy, etc. Here's the web site with the same rotor for the Winzip brake that is used on the Sun trikes. (I hope nobody thinks I work for that site, like I was accused of not to long ago. It's the only place I've seen the Winzip brake/rotor.) https://www.bicycledesigner.com/defau...umber%3D505202

Nothing was changed to install the Avid rotor...it just bolts on like the old rotor did. I almost didn't pull it when I got the Avid, but it was a little warped. Here's a picture of how the rotor goes on the trike. In this they are using an Alfine trany...but it bolts on the same way on the stock hub. https://www.utahtrikes.com/RECENTTRIK...Sun_X3_SX.html

Yeah, it's the Roundagon.

Thanks,
Mr Gnome

Your old rotor isn't all that unusual either, looks like Hayes and Tektro models you can get. BTW, you can easily true a rotor.

I'd seen the tool to true the rotors. I checked it out with a straight edge and it isn't really warped that much at all.

As long as I'm not going to lose any stopping power, I may put it back on. I was just concerned with the less surface area that would be the case. Even though it doesn't, it gives more of a strong and fast look, etc...and with that trike I need all of the fast look I can get, where it just looks like I'm holding back the speed cruising!

Thanks,
Mr Gnome

Better yet sight with the caliper/pads to check for trueness; laying it on a bench or checking with a straight edge won't tell you a lot. You don't need one of the special tools (although I'd go with the Morningstar set if I was buying), a small crescent wrench (clean) works quite well. Google for "slots holes disc rotors"....