Disclaimer: ONLY XML tweaks and not crazy ones, balanced if you want to. Less than 1 mb for all of those who need to care. Such as downloads for COOP/Multiplayer or console.
IMPORTANT ("really nice to know"): Please use Snowrunner.mod.io to assign MEDIUM LOGS to the SHORT LOGS carrier! So P12W can have since Phase 4 Update ("Short Log Platform" available) now a Loglift with short or medium logs addon and a corresponding log trailer!
Contents: Tweaked Trucks as Mod - P12W, P16 and Derry 31/45 plus Western Star 6900 Twinsteer- "the heavy stooges" of US maps. If there is an issue with the tweak, please use the contact from Mod.io
Goal: The US Heavies are meant as a balanced mod and not a plain fun/op mod, sitting right in between the heavy RU and most medium 6x6 trucks. So with heavy load it shall still perform better than a GRAD/Tayga. Unfortunately "OP" is a wide definition - Michigan and Alaska are very different from Wisconsin or Urska. Using these on your first playthrough in Michigan is kind of "cheating yourself", you will learn nothing and ruin your gameplay on later maps by yourself. They shall be on the usable, but fun side of life being kind of balanced - and each truck shall have some character and own usecase. If you make a mistake, you will be still punished. It still won't fly across mud. But they should be now a nice option in the heavy class, especially for logging tasks with heavy trailers. As many of these can transport long and medium logs, P12 has the CATs medium log addon plus option for a medium log trailer. I personally like to play US trucks on US maps and RU trucks on RU maps.
The HOT Tires (P512 derivates, 200kg and 3.5 friction) are often good enough even for Urska River map. On other maps, you do not really "need" these. Keep in mind - the ZIKZ605R has more than 20 tons weight and offers 260K Torque with 8 wheels of 600kg and 3.0 friction. So an 18 ton Oshkosh^wDerry 45 with 8 wheels of 200kg and each 3.5 friction is not exactly OP. If you take an RWD truck as P16, you may take better wheels (its 400kg clone).
Gameplay and list of major changes:
* all: suspensions heavily tweaked for better performance. Better winch on your call for some trucks - its still an offroad driving simulation, not "World of Winching". Most of them have access to "mudchains", so these will work on icy roads way better than current chain implementations. KOLOBS as-in-game-benchmark are mudmonsters and very stable - so let these fat and stable RU rule mud & snow - and the US counterparts shall have different strengths. Agility, gimmicks, style - whatever. These play very different.
* Pacific P12: I suggest you install "Poghrims Universal Addons" to make that truck look and partially work better. Its 25t weight (unchanged), got the CAT745 medium log carrier (no mod to download), with 250 to 275 K torque a perfect medium log transporter. "Special gearbox", so its not exactly fast. It never was in real life. Three tiresets available - all are dual rears. One is "stock", one is borrowed from P16 and the other is its chained version. Grip numbers in description. The chained ones are less "muddy" than the P16 Offroad tires - for sake of gameplay. Not one set to rule them all... Adapted the center of gravity, so it feels acceptable with respect to tipping over. Its neither as stable as a KOLOB nor as fast on its back as a drunken blonde in springbreak, as it was before ;) Snorkel untweaked, so its the worst of the trucks in water and very far away from being a submarine. But the one with the most ingame options with respect to addons. Since Update 1.2.0: Access to flatbeds. The triple one fits nicely. And no, I do not put a minicrane on it. With Olsom's 4 slot offroad trailer you get seven slots of cargo to haul, thats good enough.
* Pacific P16: Still 25t, shipped with offroad gearbox and an optional HYBRID gearbox (a bit faster in high). Two tiresets available, got also some chains which do not suck in mud (see P12) and being usable on Alaska. Center of gravity adjusted, its now lower and way more to the rear for a more realistic axle load. The suspension as well as chassis twist is optimized with respect to damping and strength. Steering angle increased, so that it can reverse better with a long log addon, its now more agile as a P12. The "real world original" had a topspeed of only 50 km/h but with 500 HP, but a gross vehicle weight of more than 100 tons. I suggest to start at 250K for "near vanilla" pleayers and go up to 300K torque as it does not have AWD. With the improved suspension you really do not need neither "cheat AWD" nor the "OP Tireset", the OHD are good enough. With respect to the ZIKZ and Kolob (25 tons with 8 x 600 kg wheels, Grip 3.0 and AWD) a 400kg wheelset with 3.5 friction in mud was implemented as "OP" one. I personally dislike using cheat AWD on RWD trucks such as the CLT 9000, Fleetstar 4070A, P512 and this P16. Feels somehow wrong, there are enough AWD trucks in the game.
* Derry 3194: Way larger tires (57'' rather than 52'') as any redneck garage can and will mount. A bit better steering angle (but still handling as a brick) - so I'd call it "Brutus". The counterpart to the nimble Derry 45 and a nice successor to the 10 tons 6x6 M916 as a nice medium sized tractor. The dead axle is now sufficiently high up, it will not really stop you. Consider it as a party trick - its still dead and useless in any offroad operation. Who needs movable axles if you have really large tires with a high suspension ... I suggest to start with 225K up to 250K engines being pretty close to vanilla gameplay. Wheels themselves with stats are stock - OHD1 recommended, chains available. Removed the pointless highway and allterrain tireset. Used that truck on my Urska campaign - approved. I still do not like Urska.
* Derry 4520 got 8 of the "P16 front tires" as well as a set of chains to work on icy roads. Grip numbers in the description as soon as changes to stock tiresets were made. Vanilla KOLOBs have e.g. 260K with 8x600 kg wheels - this one has 2/3 of the weight but only 200kg wheelweight. That truck fully upgraded is now a nice nimble heavy, its also fast and has wheels everywhere. Despite the small tires, it works really well. Its weight was reduced to 18 tons (Oshkosh 1070 according to Wikipedia). Its therefore less "sluggish" than the Pacifics and kind of "lightweight in the heavy class". Strengths: fast, agile, access to chains. Will still use quite some fuel. Way not that stable and foolproof as the Kolobs, but its IMHO the most fun of the US Heavies now. Especially for hauling "saddle low Semitrailers". Works by the way great with Olsom's 6-slot saddle low.
* Western Star 6900 Twinsteer: Mostly suspension work and the "typical" center of gravity at "0;0;0" was a ****, its now a bit lower. It will still tip by the way, but not that quickly. You get now a single "acceptable" tiresize in between the vanilla ones, but also active suspension to trade in case of desaster some ground clearnance for stability as well as way better working suspension with better damping factor. It will tip over, but not "rebounce" you over. For those who need some better tires on e.g. Amur Region: Take the P16 derivates. Engine upgrades beyond 250K possible, but really not necessary. Weight unchanged by the way. Since AMUR: Trailer hook added... feel free to use OLSOM's 4 slot or even 6 slot trailer to transport 8-10 cargo slots in total.