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Old 12-17-2018, 02:33 PM   #11 (permalink)
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Originally Posted by roosterk0031 View Post
195-65-15 G3/G4's on my cobalts & elantra, all weigh 3-500 lbs more than your Yaris, 100-150 lbs each tire less weight doesn't sound that much different. Actually have G3/G4 on all my cars. Tires are cheap vs tows or deductibles.

Recently I've been buying mine on Ebay (tireseasy), they often have lower prices on ebay than their own website, past have been from simpletire. Simpletire looks cheapest today.

They also make 195-60-15 if you wanted to stay a little bit closer to stock diameter.

Checked Nokian site, the
195-65-15 is listed at 25" OD, 832 revs/mile
195-60-15 is listed at 24.2 OD. 859 revs/mile
175-65-15 is 24.0 - 866 rev/mile

I don't know if you calculated or used their numbers. Page 19
Thanks roosterk0031. I have previously browsed the catalog but completely forgot about tracking it down this time around. It was quite helpful.

I also see that there is a 175/70-R14 WR-C3 tire available. I recently got a set of Nokian WR-C3 for my wife's 2016 Ford Transit Wagon. We haven't had much snow yet this year to test them but they look capable and have a directional thread pattern and pump sipes that are typically only offered on Nokian's winter only tires to help with wet and ice grip.

I calculate my tire sizes in a spreadsheet but they match up to the Nokian catalog. I usually go to two decimal places but the catalog rounds to one.

Some quick searching shows that the stock Yaris 15" steel wheel weighs 17 pounds. I think that also included the hubcap. It's actually a pretty decent weight for 15" rims and the hubcaps don't look too bad for aerodynamics.

The tires in stock size I'm interested in are Nokian WR-G4 and they weight 15.1 pounds. Keeping stock rims + the tires should give me a tire package weight of 32.1 pounds. The tires have a weight rating of 1100 pounds.

Going to a WR-C3 in size 175/70-R14 would be a slightly smaller diameter. The difference would .31" or -1.3%. Honda Insight wheels weigh 10.5 pounds and the tires weigh 15.6 pounds. That would be a wheel package that weighs 26.1 pounds. That cuts a whole 6 pounds per wheel on the car.
There is also the improvement of aerodynamics of the Insight wheels vs stock. The WR-C3 have a weight rating of 1520. Despite the small downsize I'm still interested in getting Insight rims.

I still need to check with Discount Tire to get prices for moving the TPMS and if they will install larger sizes such as 185/65-R15 and 195/65-R15 tires.

I was able to save around $25 per wheels on tires for my wife's van by having them price match tires I found on Amazon.

I'm currently on the fence between:

Stock size Nokian WR-G4 175/65-R15 with stock rims.

Up size Nokian WR-G4 (185 or 195)/65-R15 with stock rims.

Slight downsize Nokian WR-C3 175/70-R14 With Insight rims.

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Old 09-01-2019, 07:56 AM   #12 (permalink)
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Howdy all,

Just an update. I totaled my 2017 Yaris L hitting a deer. It was around 5:30AM and the deer was on a full run from out of nowhere.

I have dash cam footage of hitting the deer. I didn't have time to react so it was a straight on hit close to center slightly passenger side at 55MPH.

The drivers airbag, drivers knee, and both side curtain airbags deployed. The drivers knee airbag turned the extra keys hanging from my key chain into shrapnel. I should have saved or at least gotten a picture of the key chain ring since it was twisted up and opened pretty bad.

Over all after switching to Mobile 1 0w20 EP over the winter ~10K miles I averaged 38.6 MPG. Since the spring oil change I averaged 39.2 MPG on the lie-o-meter before I totaled the car.

I'm currently in the market for a new sub compact. I'm pretty sure I'm going to get a 2018 Toyota Yaris IA (badge engineered Mazda 2 sedan). I almost got a Scion / Toyota IA last fall but the reliability data wasn't really robust yet.

On my soon to be new car (2018 Yaris IA) I still want to swap over to G1 Honda Insight wheels. Unfortunately since the 14" wheels and my desire to stick with Nokian tires on the IA the the tires will be 5.14% smaller than the stock tire / wheel package. I'm not sure if the gearing reduction and the dropped ground clearance of 15.625mm will even out as far a fuel economy.

185/65R14 Insight vs 185/60R16 Stock (an odd size with very limited selection). 195/60R16 is the most common size most IA owners use that is close to stock diameter.

The good news is that I'm pretty sure the IA has indirect ABS TPMS vs direct so that's one less cost / issue to deal with.

On the other hand the automatic has a taller 6th gear and a taller final drive than the manual so it's still probably going to be just fine.
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Old 09-01-2019, 08:14 AM   #13 (permalink)
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Sorry to read about your loss, hope you are OK.
Thanks for the keychain info, I'll shorten mine.

FWIW, I see better economy on my 175/65R15 steel rimmed winter tires with non-aero hub caps than my OEM 185/55R16 alloy rimmed summer tires.
I feel you should not go wider especially if you also raise the pressure.

Go for the best quality tires you can get. I lost a car due to crappy tires which wasn't too bad as the car was crappy too ('86 4-gear single cam deasel Rabbit, acceleration timed per calendar).
The only reason to get wider than OEM would be if that allows for better tires.
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.16 Gmeter or 0.1 Mmile.

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Old 09-02-2019, 10:54 AM   #14 (permalink)
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That is interesting information about how extra keys from a keychain can be bad in a wreck. My Mazda3 came with keyless ignition, so all the keys are in my pocket. Serendipity.

When I changed tires on my Mazda3, I put on 20565R16s in place of the OEM-supplied 20560R16s. The difference is about a 3% taller tire. I just put them on, but the brand new tires did not show any MPG decreases, so they may give me a little boost as they wear-in.

My car alarms for flats by utilizing the ABS system. It has worked quite well, and one added benefit is the fact that it let me know when one of my old tires began to experience belt separation. Even though the tire pressure remained the same, the tire grew in circumference due to the belts giving way, so the system let me know because the tires were no longer all rotating at the same speed. This was a real asset to me. Plus, when I changed my tires out, I didn't have to worry about switching or buying new pressure sensors. Again, serendipity.

Last edited by MeteorGray; 09-02-2019 at 11:00 AM..
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Old 09-02-2019, 10:29 PM   #15 (permalink)
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Will the new car be a manual or an auto? Manual = better mpg, regardless of gearing (for the most part).

Would 14" rims even fit on the Yaris? With 16s my guess is that anything smaller than 15s might not clear the calipers.

Lightweight 15" rims with Bridgestone Ecopia 185/65R15s (Prius eco tire) would keep the same gearing. Prius 15" rims are lightweight at 14lbs IIRC but they're 5x100 vs the Yaris 4x100 bolt pattern.

165/80R15s would give you taller gearing and a narrower tire for FE, but I can't seem to find any that are LRR rated, so FE would likely take a hit unless run at 100 PSI or something insane like that.

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