Belt Driven Drive Trains

[Sh1ine]

Hi all. We have been running belt driven drive trains for about 5 seasons now. We run 15mm belt on a 24 tooth pulley inside of a 1.5 x 3 tube. (we have never had a belt break) I am interested in trying to fit our pulleys into a 2 x 2 tube, using a 24 tooth pulley would be cutting it really close, to the point where I don't think it is worth even prototyping. Has anyone used a VEX 18 tooth pulley with a 15 mm wide belt? If so how did it work? Did you have belt issues? If you have used something smaller than 24 tooth but larger than 18 I would be interested to know about that too. There is a Google Sheet that has some infomation on it, but it seems like it hasn't been undated for some time, so any recent insight would be helpful.


Thanks!