belt compatability

I am seeing that the 850 angle may be different again??

13 degrees instead of 13.5 degrees?? unless the 13.5 degrees was trail sleds??

Anyone able to confirm.

Read this first:

https://www.snowest.com/forum/showthread.php?t=442038

Correct me if I'm wrong, but I think when a belt stretches, you'll lose RPM even if it's not slipping at all. The reason being that a stretched belt will allow the primary to shift out farther and load the engine up more. So, if the old belt was more stretchy, then I could see the new one gaining RPM and performance. If that's not the case, then you're absolutely right: you're gaining some RPM, but losing performance because you're wasting HP on a slipping belt.