I've been running 5.25 theeve tikings on an 8.25 chocolate deck with a 14.0 wheelbase for about a month. Beforehand, I had thunder 149s on an 8.5 polar with a 14.5 wheelbase. This is a kind of review I guess.
TURN:
(I normally ride my trucks on the deep end of loose, so take my words with a grain of salt)
Right out of the box they seemed stiff as, and didn't turn nearly as sharp as my thunders I had before. Then again, nothing really does. They didn't seem to lose the 'new truck' feeling after a few sessions with them, and the turning remained to be stiff.
Swapped out the standard bushings for bones mediums on the bottom after a week, would have used a whole set if I had one. That seemed to fix up the turn enough for them to be comfortable, but it still left much to be desired. If I can get my hands on some softer bushings I'll update on how they feel.
GRIND:
I noticed little difference between the two trucks in how they feel to grind on park ledges, but on crustier curbs they tended to stick more than my thunders had.
I haven't gotten around to learning smiths yet, so I can't speak on what the kingpin clearance is like.
The baseplates are pushed out more than on thunders which made noseslides a lot easier to stay on, however they don't pinch as nicely on crooks. However, nothing really does.
BOARDFEEL:
While this may be due to wheelbase, straight away they seemed WAY more responsive in the pop than the thunders. Higher tricks came easily, and the only problem I had with my flip tricks was that they would overflip too often.
There were minimal speed wobbles while bombing hills (30kmh at max though).
I don't skate much transition partly due to there being no bowls near me, but it would be fair to assume they wouldn't carve as much as other trucks.
MISC:
-In your hand these feel like a light truck, I didn't weigh them but online it says they're 332g.
-Manuals felt harder to balance than on my thunders, and I still haven't gotten used to it completely. This could be due to a number of factors though.
-The hanger seems to look slightly bent, though it hasn't affected anything as of yet.
-It has been a battle to get any grooves, however the other side of this is that they will likely last a long time.