2.8" and 3 100MM Idler belt issue

[myke hunt]

The car had these on with a 25-080755 belt from NAPA which is slipping.

Outside circumference is 76.25" with this belt and I was looking to go to a 75.56" outside K080751 (I bought a K080745 which is 75.125"). Would the best bet be the 75.56" which should be the happy medium? The 745 maxed out my tensioner.

 

[lunadiver]

On metco's website they recommend a 75" belt. So that would make it a k080750. And you can breakdown the size of the belt by the name like the k080755. The 08 means it's an 8 rib and the 0755 means it's a 75.5" belt.

 

[choate]

The ole Gates belt part # situation vs what they list as length. When I told them I needed a 75" belt so which one should I order they said the part # 745. Got it , and couldn't get it on. Ordered the 751 and it fit perfect. This is with a VMP with a 3" upper, 3 100s and one 90 aux MM idlers