ACE Trucks!! Do these have the best turning on the planet?
Best stock bushings!!
Top bushing is rated at 91a while the bottom bushing is rated at 86a.

Suggested Size guide:

8 inch truck - Fits boards 7.75 to 8.25
8.25 inch truck - Fits boards 8 to 8.5
8.5 Inch truck - Fits boards 8.25 to 8.75
9 inch truck - Fits boards 8.5 - 9.25

The above guide is only a suggestion.
We won't call the police if you put 8 inch trucks on an 8.5 deck, but it might look silly and function differently.