Pulley Size

[Sh1ine]

We have been using 5mm GT2 timing belt and pulleys for the last 3 year with great success, especially the last two years. Our first year we used 9mm wide belts and did not use exact center to center distances and had some skipping issues. The last two years we have used 15mm belt and exact center to center and we have not had to change a belt at all. We have also been using a fairly large pulley (27 teeth) and this year I think that we may want to decrease the pulley size. I am wondering what teams are using timing belt for the drive train successfully and what their set-up is. Specifically Timing Belt width, type, and pulley size.

Thanks!