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Kia Sorento 2021 (1.6 T-GDi AWD, XL Prestige Line)
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11 Posts
Discussion Starter #1
Hi,

does anyone know why Sorento T-GDi HEV has a homologation only for 235/65 R17 and 235/55 R19 tires, while Diesel version has a homologation for 235/55 R19 and 255/45R 20?

So, if both HEV and Diesel has one common tire size which is 235/55 R19 (while HEV has extra one for R17 and Diesel has extra one for R20), what would be the potential problem to put the 255/45 R20 tires to the HEV version?
 

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2006 Kia Sportage EX 2.7L
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90 Posts
If they're about the same dia. I don't see an issue. Aside from the bigger the wheel, the rougher the ride.

235/55-19 5.1in 14.6in 29.2in 91.7in 691 0.0%
255/45-20 4.5in 14.5in 29.0in 91.2in 695 -0.5%
 

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2019 Kia Niro PHEV EX Premium
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4 Posts
Also the wider and taller 20” tires will negatively impact the hybrid’s mpg. I’m pretty sure I’ve seen the 17’s on the hybrid and they are aerodynamically designed.
 

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2019 Kia Niro PHEV EX Premium; 2015 Subaru Outback 2.5 Ltd
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31 Posts
Also the wider and taller 20” tires will negatively impact the hybrid’s mpg. I’m pretty sure I’ve seen the 17’s on the hybrid and they are aerodynamically designed.
@ Silver Flash: True that but given the size and heft of the Sorento -- especially in the hybrid trim -- the 235/65 R17s seem a little undersized. I'd probably opt for the 235/60/18s either as an option or go aftermarket. Its not too hard to find nice lightweight aftermarket wheels in the $100-$130 price range but aftermarket aero wheels are rare and $$$.
Interestingly, according to C & D: Tesla's aero wheel covers proved to be 3.4 percent more efficient across all three test speeds, which is a sizable gain in the automotive world. Dec 19, 2019

@ Mike-pl: You probably are making a joke but just in case your not its aerodynamic wheels, not tires.
 

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Kia Sorento 2021 (1.6 T-GDi AWD, XL Prestige Line)
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Discussion Starter #6
@ Silver Flash: True that but given the size and heft of the Sorento -- especially in the hybrid trim -- the 235/65 R17s seem a little undersized. I'd probably opt for the 235/60/18s either as an option or go aftermarket.
Sorento doesn't have a homologation for 18s (neither hybrid or diesel). I guess it's best to stick with 17s or 19s to keep fuel efficiency computing details correct.

@ Mike-pl: You probably are making a joke but just in case your not its aerodynamic wheels, not tires.
No way, there are no aerodynamic tires?! 😁
 
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