Tire Upgrade

[hyo silver]

Originally Posted by Wa1hog

...I have noticed that my speedometer is usally 1 to 2 MPH faster than what my GPS says Im going.

Originally Posted by F8L

...The stock Prius tire size in the U.S. is 185/65/15. Overall you want to try and maintain the stock 24.4" diameter.

This may have been discussed sometime in the last few hundred posts, but I'm not about to reread the whole thread to find out. My apologies if you've heard this before.
Knowing that the speedo reads a bit fast with the stock tires, wouldn't a tire that's slightly smaller improve the speedo's accuracy? I'm thinking the TT's revolutions per mile of 862 as a replacement for the Integrity's rpm of 855 is just about perfect.

[nyprius]

Originally Posted by mtagg49

Thanks for the great research - have you had any experience with the 195/60 TT in snow?

Mike from Chappaqua

The TT's are great in the snow and rain, as well as on dry pavement. They're an excellent all around tire. My only complaint is that they've gotten noisy now that I have over 40,000 miles on them. The tread will probably last to 60,000 or 65,000 miles. Not 80,000.

When it's time for new tires, I'll try something new. I want a tire that has excellent handling like the TT, but is quieter. I'd also rather get a non-directional tire next time. This way I can move the tires to the other side of the car if I have a pulling problem that isn't fixed by alignment. I have a slight pull now and have to live with it. I'm not sure if the pull is caused by the tires since I can't switch them over to the other side to test, unless I take them off the rims, which I'm not going to do.

[jdenenberg]

Originally Posted by hyo silver

Knowing that the speedo reads a bit fast with the stock tires, wouldn't a tire that's slightly smaller improve the speedo's accuracy?

No, smaller tires will make the speedo read higher. You need a tire with fewer revs/mile to adjust the speedo lower (note that this will appear to lower your MPG by the same %, but the change is not real).

JeffD

[dwreed3rd]

Originally Posted by jdenenberg

No, smaller tires will make the speedo read higher. You need a tire with fewer revs/mile to adjust the speedo lower (note that this will appear to lower your MPG by the same %, but the change is not real).

JeffD

jdenenburg: I don't know if Hyo Silver has an SGII, but if so, I believe there's a mileage adjustment. In fact, I know there's one. I went crazy trying to set it for the Avalon. That's when I realized the Georgia's mile markers are all screwed up with all the new construction on GA 400. Anyway just a thought.

[kcribk]

Has anyone researched (or had experience with) the Yokohama Avid T4 or the Yokohama YK520?

[sherrard]

Just ordered new shoes for our 2006 Prius -- Falken ZE-912 195/60HR15 -- after reading a mind-numbing number of posts/reviews/ramblings....

The OEM Integrities still have reasonable tread at 32,700 miles, but we've never liked them and certainly don't want to go through another winter with them (lots of rain, some snow).

Getting them at my local Discount Tires -- their price was $90 + $13 each install/balance. Sears had them for $73.14 + $11; DT matched the price instantly -- I've always had good experience with buying from them (and from Costco, but they won't install 195s...).

--------------------
12/28: Well, we've had the Falkens on for a couple of weeks, during which we've had some of the most severe winter weather here in decades -- lots of snow, without the usual warming to melt it. So lots of experience driving on soft snow, packed snow, ice, deep 'slush ruts' (where the low clearance is a problem...). The Falkens are certainly better in these conditions than the Integrities (especially after 20K-30K miles!) -- not a snow tire, but a reasonable all-weather. In the limited use we've had on wet & dry pavement, they're very solid & stable; we like them a lot. Have no idea yet about mpg, since conditions have been so weird. Road noise seems about the same, but it's not something we're very sensitive to. Highly recommended so far.

[chefboyarlee]

Costco is funny. One said that they would not install 195/60/15 instead of the OEM's size. I went to another Costco maybe 15 miles away and they did.

[doctorbob]

I want to thank nyprius for his posts on this thread lo these many years ago. Tomorrow I am ditching the OEM Integrities which were barely adequate new and now, 28,000 miles later, are downright dangerous. Looking forward to the Goodyear Assurance Comfortreds, 195/60/R15s. Am opting for these rather than the TripleTreds because we are leaving snowbound Ohio next year for warmer climes and I think the Comfortreds will be a great rain tire and have a quieter ride than the TTs.

[GB'sprius07]

just bought my 07 Prius last week the OEM GY Integrity's are worn out , low tread they need replacing NOW! i have read many many ... post concerning tire upgrades ,the more i read to more i don't t know the way to go ..?, I'm looking for handling, longer tread life , smooth ride ,reasonably cost , maintaining milage , I'm new with this Prius , but so far im getting 50+ since i bought it , I'm sure there is more to learn on that point ,that's for my next post , but for now , i would be very interested in any one out there who can suggest some good upgrade ideas , so far i have been looking at the Bridgestone Potenza G019's , GY TT'S Michelin HE 's, GY Comfort and as well thinking of going to the 195/60/15 up from the spec. 185/65/r15 , that what i have been reading , it makes since to me, so if any one can send me some helpful info or suggestions on this matter , i would greatly appreciate it .....

Happy Driving ... Thanks !

[patsparks]

Everyone will recommend the tyres they fitted to there car, I recommend Michelin Energy XM1+.