Yes, the Konig Self-Tensioning Snow Tire Chains # TH2004705255 come as a pair, allowing you to install chains to both tires on an axle. I have attached a great installation video as well just so you can see exactly how they work. view full answer...
The Curt Echo # C51180 needs a 40 amp circuit breaker, part # 9510, to provide 12 volts to the 7-way trailer connector at the rear of your vehicle. You also may need 10 gauge wire, part # 10-1-1, which is sold by the foot.
If you already have a 4-way trailer connector and not a 7-way, you can use the install kit # ETBC7 which provides you with the 7-way, wiring, and circuit breakers needed to to power your trailer's brakes. If you don't have the 4-way connector yet, the ZCI Circuit... view full answer...
The Stealth Hitches Hidden Trailer Hitch Receiver w/ Towing Kit # SH85VR does indeed include all parts needed to set up your 2018 BMW X5 for towing. This includes the wiring, 7-Way plug, mounting bracket, and a 7-Way to 4-Way adapter. I included an install video we have of this being installed on a 2017 X5 for you to check out as well. view full answer...
Yes, the 37-1/2" and 41" crossbar lengths are correct for the Thule WingBar Edge Crossbars # TH56FE on your 2023 BMW X5, along with the Feet # TH89SC and Fit Kit # TH186007.
According to the Thule instructions you want the 41" crossbar in the forwardmost position.
The reason the crossbars have different lengths is because they end in the feet which are positioned along the flush rails of your vehicle, which it looks like starts off farther apart at the front of your vehicle and slowly... view full answer...
The valve stem is indeed included with the Westlake ST225/75R15 Radial Tire w/ 15" Liger Aluminum Wheel # LH36FR so you don't have to purchase it separately. view full answer...
The Stealth Hitches # SH98VR only comes with a 7 way trailer plug included but you can use a trailer with a 4 way plug with an adapter like the Adapter 7 Pole to 4 Pole with Tester and Cover # 47345. This would be the best solution and it comes with a tester included on the adapter so you'll always know that everything is functioning perfectly. view full answer...
It sounds like you already have a 7 way connector installed on the back of your 2016 BMW X5, so you've already got everything you need to use a brake controller-except the unit itself. I recommend using the Curt Echo Mobile Brake Controller # C51180 since it will easily install by plugging into your 7 way connector and provide you with proportional braking for your trailer. This unit is controlled by your Bluetooth enabled smart phone that requires either iOS 8.0 or newer, or Android 4.4... view full answer...