Hello everyone, I'm new to CK5. Have an '87 GMC 2500 4x4 350TBI/TH400/NP208/4.10s, 150k, bone stock. It's time for some new tires and wheels which leads to a whole litany of choices and options. /forums/images/graemlins/thinking.gif I live in western Colorado and am surrounded by fantastic 4 wheeling opportunities. I've been impressed with the comfort and capability of the stock vehicle off road. The break-over and departure angles are a bit of a problem. I'm looking to improve this with sliders, larger tires and maybe a suspension lift. Tires: Considering 33's or 35's and perhaps a softer 4" all spring lift that will help make room for the new rubber while soaking up the bumps. I'm not completely averse to cutting the wheel wells if it can be done cleanly to reduce the required lift and enable full suspension articulation. I would like to use an aggressive tread radial tire that is not too noisy on the highway, has a decent tread life, can air down on the trail to soften the ride, but with sidewalls that can stand up to the jagged rocks and the weight of this full size. BFG Mud Terrains and Goodyear MT/Rs seem like the safe bets, but I am also considering the Interco TSL SSRs and the Mickey Thompson Radial Baja Claw. Decent performance on wet roads and ice is important to me as well and I'm guessing difficult to find with this style of tire. What are your thoughts? I've got a 60/14ff pair sitting around with 4.56s I planned to use on another project, but they could be drafted if the stock axles (10/14sf) and gears (4.10) aren't up to the task. I would prefer to use the existing axles/gears if possible. Springs: I'm shooting for good ride both on and off road with improved off-road capability. Does anyone know the OEM spring rates front and rear (56") for the 3/4 ton? What are your thoughts on spring rates, price, and performance for the offerings from BDS, Tuffy, Skyjacker, Superlift, Rancho, Rough Country, others? Who would you recommend as a good vendor to deal with? I'm heading over to Denver this weekend to check out 4WheelParts Truck Fest. I'm inclined to install everything myself, but I could be tempted to let a competent vendor install it if the price was right. Airbags: I'm thinking about Firestone Ride-Rite airbags in back so I can level it up when fully loaded and/or pulling a trailer. They list spacers for lifted vehicles if I go that route. I'm hoping this can balance the desire for supple springs without losing the load carrying capacity for hauling and towing. I've been told the bags will limit articulation. Anyone have experience with these? Shocks: Any thoughts? Nitrogen charged? Bilstein 5150s? $100/shock seems a little pricey are they worth it? How about the 5100s? Other recommendations? Overall, I'm looking to tap the wisdom of fellow Suburban owners to find a complete package of components that work well together on a Sub. What have you done? How did you like it? If you were starting fresh and had it all to do over again, what would you do (springs, shocks, wheels, tires, other)? Any and all thoughts and advice welcome and appreciated.