So I have a bit of an odd idea, I want to autocross my 2017 Chevy Colorado. Per SCCA regulations, track width must be wider than vehicle height, which is a bit of a tough one considering the stock height is 70.7 in vs 62.4 in track width.
I have ordered a lowering kit to drop me down ~3.5 in (maybe more, 4 rear, 3 front and the truck comes from the factory with a raked stance). I am also moving from a +33 offset to 0 for an additional 2.6 in track width.
Alongside the new wheels I am going to go with shorter tires to get me the rest of the way there, but I have a question about this. Stock comes with a 110 load rating (I think), which is 2337 lbs per corner. Most tires I can find in the new size are 97 load rating at 1609 lbs. GVWR of the truck is 5800 lbs. Truck weight should be somewhere around ~4200 lbs with driver, fluids, etc.
I don't ever expect to carry anything near the payload capacity in the bed, and I don't expect to ever really tow anything more than 5000 lbs. Trailering is a pretty infrequent occurrence for me.
I'm not looking for someone to give an absolute "yes this is fine" since we are talking less than the manufacturer's recommendations, but does anyone see any issues with moving to the lower load rating as long as I am understanding that my total payload would be impacted, and I shouldn't go crazy with towing at the max 7000 lbs the truck is rated for?
And yes if anyone is keeping track I did account for the size difference needed to get that 1:1 ratio, along with the new effective final drive ratio. I know it's not the right "tool for the job", but I think I'll have a lot of fun with it if I can make this work.
I have ordered a lowering kit to drop me down ~3.5 in (maybe more, 4 rear, 3 front and the truck comes from the factory with a raked stance). I am also moving from a +33 offset to 0 for an additional 2.6 in track width.
Alongside the new wheels I am going to go with shorter tires to get me the rest of the way there, but I have a question about this. Stock comes with a 110 load rating (I think), which is 2337 lbs per corner. Most tires I can find in the new size are 97 load rating at 1609 lbs. GVWR of the truck is 5800 lbs. Truck weight should be somewhere around ~4200 lbs with driver, fluids, etc.
I don't ever expect to carry anything near the payload capacity in the bed, and I don't expect to ever really tow anything more than 5000 lbs. Trailering is a pretty infrequent occurrence for me.
I'm not looking for someone to give an absolute "yes this is fine" since we are talking less than the manufacturer's recommendations, but does anyone see any issues with moving to the lower load rating as long as I am understanding that my total payload would be impacted, and I shouldn't go crazy with towing at the max 7000 lbs the truck is rated for?
And yes if anyone is keeping track I did account for the size difference needed to get that 1:1 ratio, along with the new effective final drive ratio. I know it's not the right "tool for the job", but I think I'll have a lot of fun with it if I can make this work.
Last edited: