Yokohama Tyres for Prius 2023 - EU labels

Too bad those tires are such an unusual type, otherwise I would swap them for Continental EcoContact 6 and be done with it.
Really good tires.

 

Where are you getting these specs / ratings? Is there a good site that has these details that is easy to search / filter?

 

It's not great, but the official EU site is navigable: EPREL Public website
Expand the advanced section option and then switch to structured in the tyre size designation sub-panel.

Just understand that these ratings are for the EU versions of the tires; the NA versions may or may not be the same.

The EU rates in three categories: fuel efficiency, wet grip, and noise. Each category is rated from A(best) to G(worst).

Personally, I prefer tyrereviews.com. Not only do they review many more factors than just the three that the EU does, they also allow you to change the weighting per category to suit your conditions. For example, someone who lives in Seattle would weight wet braking more important than someone living in Phoenix and vice versa for dry braking. The problem with tyrereviews.com is the same as the EU site: they also only review the EU versions of these tires. It's not perfect for a NA buyer, but at least it's thorough and it's something.

 

There is also this 19" from Yokohama, same fuel consumption (C), wet grip (A), but lower noise (A):
- https://www.yokohama.eu/en/V552/?tx_tyre_pi1%5Bdiameter%5D=19&tx_tyre_pi1%5Bindex%5D=&tx_tyre_pi1%5Bratio%5D=50&tx_tyre_pi1%5Bspeed%5D=&tx_tyre_pi1%5Bwidth%5D=195&cHash=49a4b058cd1bb81e6d5e65ad87ca18a4
- EnergyLabels_Tyres_SVG

I would guess the reason for the middle rating on fuel efficiency of the 19" tires is their (purported) excellent wet grip performance. It's the other way around with the 17".
From their name, I also think the tyres are designed for different priorities or market segments. The article posted by the OP cites the 19" to be called BluEarth-GT AE51 and the 17" BluEarth-FE AE30 (can't find them on the Yokohama EU website yet), so probably GT on the 19" stands for Grand Touring while FE on the 17" for Fuel Efficiency.

 

Any idea if 7.5" wheel too wide for 195/60/17? This size is just too new I can't seem to find the acceptable rim width.

I'm definitely going to downsize the wheels from 19" to 17" it's just the wheels I have are 17x7.5, might be a bit too wide for 195 tires and I hate to have to go 215 tires and lose mpg

 

I have never seen Yokohama tires on Prius, including Gen 5. They are typically Toyo, Bridgestone, or Dunlop, but there should be others. So, this is a new thing. I had best performance with Dunlop. So far, we have seen Toyo and Bridgestone on Gen 5.

17" tires are touted to have much better fuel economy and much less noise.

 

not having a wide variety of choices is a bummer. hopefully by the time one needs new tires, more models will be available.
otoh, the factory tires on my 3 prius were awful, and i should have replaced them immediately

 

For those unfamiliar with EU PHEV ratings, the weighted fuel economy figure is a mix of gas and grid electricity. Or Toyota is really underselling the hybrid fuel efficiency there.

Looks like an EPA EV range of 39 to 47 miles will be likely.

The cars at press events had Toyo Extensa A/S II on the 19in rims. The 17in appear to be some type of Ecopia from Bridgestone; pictures were less clear.

 

We have seen many pics of Toyo and Bridgestone tires on Gen 5 Priuses.

 

BEV range probably 44 miles with 17" tires and 36 miles with 19" tires.

Canada specs were 40 mi/33 mi for 17"/19" tires, but I think we will see 44 mi/36 mi for 17"/19" tires from what I gather from the Japan specs. In any case, the 17" tires have a 22% longer BEV range than the 19" tires.

Canada Prius Prime trim-level details | PriusChat

 

Likely the EAER (Equivalent All Electric Range) does not reflect EV-only range but it’s similar to EV auto where the ICE does some work too. EV-only range would be AER (All Electric Range) which is not advertised. Usable battery should be around 10 kWh vs 6.6 kWh of 4th gen, more or less a 50% increase. If the 4th gen does around 45 km AER with 15” wheels though I would expect a less than 50% improvement with 17” and even less with 19” wheels.

There is some info in sections 3.1.1 and 6.4.2 here: https://www.transportenvironment.org/wp-content/uploads/2021/07/2020_11_Plug-in_hybrids_report_final.pdf

An extract:
“the WLTP method is based on how far the car can drive in a charge depleting mode - i.e. as long as the battery/electric motor is used - before the battery is fully depleted, even if the ICE kicks in and the vehicle drives in hybrid mode during this time. The share of that total distance attributed to electric energy, prior to the depletion of the battery is then calculated and known as the Equivalent All Electric Range (EAER)”

Extrapolating from the figures in the pdf above I would expect an AER City similar or slightly higher than the advertised EAER of 86-72 km (~53-45 miles), and general AER values like those that Gokhan wrote. Worst case should be a ~30% improvement in range with the 19” wrt the 4th gen.

But hey, 200 hp, big wheels, and yellow

 

I think Yokohama's came on Gen3's

 

Possible—I haven't seen them on Gen 4 and Gen 5 (not yet on the latter).

 

MY RAV4 HYBRID comes with Yokohama. Better traction and fuel eco. and quiter compares to Bridgestone. Anyway, u don't get the car yet, why worry about the tires that's tire companies business.