I went with 90 bottoms and 95 tops in Thunder and Ace sizes and they are way soft on both setups. I have 52s on the thunders with no riser and 54 on the Ace with 1/8” risers AND ~3mm wheel wells and both are rideable but scary. I’m hoping a little time and compression will make them stiffen up closer to what stock 90a bushings feel like.
I don’t knowing of anything about urethane but have heard that it will continue to cure and harden over time which makes me wonder if the big difference is that these are coming straight out of the oven and a stock set has probably been on a shelf or in a box for a lot longer by the time I get em.
It also occurred to me that on Riptide’s site they mention their bushing formula feeling softer than comparable duro bushings from other factories; I’ve never ridden them but maybe this is a similar situation where the formula reads as 90 but something about it allows for more squish?
I had fun riding both setups different days but I’m definitely not about to go all out on em till they break in cause they’ll pitch me super quick.
The NFGs are just soft with no rebound, there is no resistance at all (I'm 185lbs) for a 90a duro, they are softer than any brands 87-88 I've tried (Indy, super cush, riptide), etc. They're even softer feeling that ACE or Royals (but both of them have actual rebound); they felt like old ass bones softs.
I'm running 87a Riptide tops/bottoms in my Tensors (rips too short for the thunders) and the Riptides are light years ahead of the NFGs. I switched to the 95a NFG top in that tensor setup and it did nothing to firm up the reaction time despite be 9+ duro, to counter I swapped in a 96a indy top, massive difference and only 1 duro ahead of hte NFG top...so yeah, they for sure are softer than advertised, by a min -5
The Venom 86a bottoms I ran with those rip tops in thunders are sooo much better than the nfgs.
Better luck next time NFG.
The pivot cups drop into any pivot cavity and seem to work great tho (also in my tensors).