madconcept

I understand that older rims don’t fit. just wondering if reducing overall diameter will cause issues? Going with a 20” wheel/tire winter setup is expensive!

That time of year again when I’m contemplating getting a separate winter wheel/tire combo. My truck was in for service so I popped over to the parts dept. The lady there eventually called me and said she’d spent a good while sourcing out some wheels and tires. She said “since it’s an Elevation with 20” wheels the only thing I could find with the same diameter would be if you stuck with a 20” wheel and tire. These newer trucks are very (sensitive) to diameter changes and all sorts of issues can occur. Needless to say 20” isn’t going to be cheap!” I’m running slightly larger than factory 275/65 BFG’s daily and haven’t had any “issues”. Anyone had issues going with a smaller diameter wheel/tire combo? I don’t care about the speedo being out a bit! End of the day my KO2’s performed extremely well last winter, they do have the 3 peak mountain symbol after all. Think I’m more concerned about keeping the 20” Black Wheels in good shape more than anything else. Winter tires are also far superior on ice as well!

I recently had my 2019 Sierra Elevation in for service and I asked about a winter tire/wheel setup. Has 20” wheels on it and stock size is 275/60R20. Although I bought it as a demo model with BFG 275/65R20 which are 1” bigger in diameter. Told them I’d want to downsize to an 18” wheel to save some dough! I eventually got a call and was told that these trucks are really “sensitive” to wheel diameter changes and my only option was to stick to a 20” wheel and tire setup. What are the issues with changing overall diameter besides having the speedo out? I don’t really care about that too much. My speedo may be out as it is with the 1” larger than stock tires I have now. Having said all this my BFG’s are winter rated and performed exceptionally well last winter!

2019 Sierra Elevation 4x4. Have a levelling kit and LT275/65R20 BF Goodrich KO2 tires set at 42 PSI. My truck also has the Max Trailering/NHT option with stock shocks. I definitely get a lot of bounce or “bunny hoping when going over bumps like the back end bounces sideways. My last truck 07 Silverado Z71 didn’t do this. I find it annoying for sure at times and my wife really notices it while in the truck. We did a camping trip a pulled our 24’ trailer and it towed beautifully. No bouncing once loaded but when driving the truck down a dirt road without the trailer there was quite a bit of bouncing around! I guess having high payload and towing capacity comes at a cost!

Thanks. I just adjusted the tilt by adding another washer. Don’t think there’s enough room left on the shank to add anymore so I think that’s all I can do. Hopefully my truck doesn’t drive all squirrelly! Big/only reason I was able to get this truck because I promised my wife it would handle our TT better than my old truck lol! I’m hoping I don’t have to go out and get airbags now! Love how the truck looks unloaded with the level kit though!

No my torsion bar height seems maxed out. Tried going up another chain link but it’s too tight to lift it into place. And yes the jack is up a couple inches above the wood blocks in the pic, looks like it may be touching lol! The rear sag isn’t too bad. From fender to tire is 5 1/2” up front and 4” at the back. Unloaded I’m about 6” front and back, with levelling kit. At the end of the day if you want to tow with a levelling kit, plan to install air bags I suppose. Trucks come out of the factory with a natural rake to compensate for loading.

Brought our 24’ Travel Trailer home from my dad’s farm. New truck tows like a champ. Has the max trailering option. Levelling kit on truck causes a bit of squat though even with a WD hitch. May need air bags to compensate for level kit.

I confess that on my old 2007 and many vehicles before my current 2019, I got into the bad habit of going from reverse to drive while still moving backwards a bit. Faulting my impatience perhMy past vehicles including 2007 Silverado and 2000 Sierra never slammed from reverse to drive. I guess GM just designed these new trucks differently. If my current truck is moving at all and I shift from reverse to drive it will slam.

I’ve always felt that sticking with the regular oil(whatever the manufacturer recommends) is more than adequate. Like for real everything around the engine while fail a lot sooner than the engine internals. When an engine finally packs it in around 300,000-400,000 km I would rather be in something newer anyways. Overspending on expensive oil and changing it when it’s only at 50% of its life is a waste of money in my opinion.

Clearance yo the factory front mud flap with the wheel straight. I could take a pic with the wheel turned if you want.

Good to know. I’ll probably consider 285/65 BFG KO2’s after I burn through my current set to get the wider/even more aggressive look.

Started a topic about P rated vs LT too. Love the way the 275/65R20 fill the wheel well but the E rated BFG sure makes for a rough ride. Probably consider going down to a 275/60R20 next time just to make the ride a bit more comfortable as you’re able to get a P rated tire at that size. Who knows maybe there will be more options in a couple years in the 275/65 size?

What I’m reading is with a 2” level the widest you can go without rubbing would be a 285 but with a 60 aspect ratio. This is for 20” wheels of course. If you want to go to a 65 ratio you need to go slightly narrower with a 275 tire. Jay Teez has 285/60’s I have 275/65’s. We both don’t have rubbing issues. Bluerado has 285/65’s and has a slight rub in reverse at full lock. We all have levels on our trucks. Hope that helps. Definently helps me because once the tires I have now will need to be replaced I was considering going slightly wider to give myself a bit more rim protection but then I would have to go with a shorter tire. I’ve kissed a few curbs and thankfully haven’t done any damage to my rims even with the 275’s! The BFG’s do a good job deflecting the curb attacks!

2019 Sierra Elevation, front level and 275/65R20 BFG KO2. No rubbing.

Has anyone recalibrated their speedometers after changing wheel/tire diameter? I have a 2019 Sierra Elevation. It was a manager’s demo. Came with levelling kit and 275/65R20 BFG KO2’s on factory Elevation black 20” Snowflake style wheels. Tires now have a 65 aspect ratio now vs factory 60. Obviously with the level and slight diameter change there’s no rubbing or anything. Also thinking about getting a set of dedicated winter wheels and tires. Probably go 17” or 18” to save some cash but wondering if that’d screw up my speedo and other components on my truck?