I installed these on my truck as one of the first modifications. I went first with the 1.5 inch, but felt they didn't really give me the stance I was looking for. I swapped, and went with the 2 inch and I really like these. The tires poke out just enough to not be obnoxious, but give a much better appearance.The installation was quite easy. My only concern is what to torque these to. The documentation says between 85-95 ft lbs, but it is not clear on whether this is the wheel spacer to hub, or the wheel (rim) to wheel spacer, or both?? The 2013 GMC Sierra calls for 140 ft lbs. So...I contacted KSP support and they recommended 140 ft lbs for the wheel spacer to the track, and 85-95 ft lbs for the wheel to the wheel spacer. The reason is that thee are aluminum an we don't want to damage. I just took the truck to the local GMC delaershipin my area, and they strongly advised to make the torque 140 ft lbs for BOTH. I went with this recommendation, but plan to contact KSP again to get their thoughts.The one downside so far with KSP, is that I cannot find any local (US) phone number to contact support. Even immediate chat would be great; however the only support I find is ticket based over email. It doesn't help for immediate questions, and this is an important one.Overall - I am happy with my KSP 2 inch wheel spacers and I recommend, but I will be in contact with them and will report back my experience.UPDATE: JUNE 10 2026I went back to KSP support:"Hello…just checking once more as my dealership advised that I torque both to 140 ft lbs. I trust the manufacturer of the wheel spacers, and you say 85-95 for my wheel/tire to the KSP spacer, correct? Is this also documented somewhere? I see the recommended 85-95….but it’s not clear which lugs."KSP Response:[ksp-offroad]Hello, this is our recommendation for your installation:wheel spacer to hub 140 ft/lbs， rim to wheel spacer 85-95 ft/lbsThere you go...from KSP directly. I feel a bit of a slight shake at 70mph, but otherwise pretty good. I am interested to review a few other products to see how well they hold up against more expensive competition.
Our spacers are made from 6061-T6 Aircraft Aluminum to keep them lightweight but highly durable and strong. CNC precision machining with professional dimensions and accurate hole position to ensure the best fitting.FITMENT: KSP 6x139.7 spacer could fit 1999-2026 Silverado 1500, 1995-2026 Tahoe 4WD, 2007-2013 Avalanche, 2002-2006 Avalanche 1500, 2000-2014 Suburban 1500, 2003-2014 Express 1500, 1999-2026 Sierra 1500, 2000-2026 Yukon, 2003-2014 Savana 1500, 1999-2026 Escalade.EASY INSTALLATION: Increase your axle track, give your vehicle more traction on the road, and enjoy a slicker appearance with this sturdy wheel spacer set after guided through a fast and easy setup!Bolt Pattern 6x5.5(6x139.7mm), Thread Pitch M14x1.5, Hub Bore 78.1mm(3.07"), Package of 2pcs real forged wheel widening spacers. Recommended torque: 85-95 FT/LBS. Equipped with Thread Locker for fastening.Surface black anodized coating can also protect the metal surface from environmental erosion under extreme conditions. ISO/DIN 10.9-12.9 grade geomet studs and high quality bolts. SCM435 steel material heat treated to prevent breaking. No vibration with max load and no noise in high speed.