Originally Posted by Jetboy

My take is that the TRD Pro fox are the best option there is for most people. Myself included. I could not find a set resonably priced for my Tundra or that's what I'd be using. They're still $5k for the set for a Tundra. For a stock truck running 32" michelin street tires that I use for towing my toys around - hard to justify $$ for suspension. I'm currently living in Alaska and the trails are not very good for full size vehicles. I almost always use my side by side. Even it is often too big/heavy for getting around on soft muskeg stuff we have (think driving on peat moss bogs). My tundra would become a submarine. However, if I could find a used set for $1500 like I see from time to time for the 4Runner, that's what I'd go with. There's no way to get a 2.5RR to ride as nicely as the bypass shock design does. At least not for the typical driving most people would do with a standard configuration 4Runner.

I think you'd be downgrading from the TRD Pro fox to a 2.5RR unless you're planning to regularly use it something close to actual desert racing or you need a lift that is higher than you can do on the Pro fox setup or something like that. The TRD Pro fox setup is pretty close to what I'd design if I had a clean sheet and the resources of Toyota. The 2.5RR is an off-the-shelf component set assembled for a 4Runner vs a bespoke design just for that vehicle.

I thought the 2.5s were good. Excellent on fast desert roads. Good but a bit harsh on the highway. If I were re-tuning them I would soften the compression damping about 20%, maybe more. The tundra 2.0 feel much softer. Oddly - I would say the front on the Tundra is significantly softer than the rear in the Tundra 2.0s. The rear 2.0 tundra shocks give you a LOT of damping all at once when you hit big bumps fast. I don't like it very much in that situation. Enough that on things like speed bumps I wince a little when the rear end hits. It feels like I'm bottoming out on the bumps. But I don't have rubber bumps - I have air bags. I'm pretty sure I'm not bottoming out. But it feels like that harsh impact at times. Slower speed - feels super soft.

The only shocks I'd look at as an upgrade from the TRD Pro would be maybe the BP51s, or 8100 bilstein setup.