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Toyota Prius Tire/Wheel Questions

86 messages,  Last post on Oct 31, 2009 at 12:13 PM

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What is this discussion about? Toyota Prius, Tires, Wheels, Hatchback, Sedan

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#19 of 86 Re: New Tires on 04 [texvegas] by stevedebi Feb 07, 2007 (12:04 pm)
Replying to: texvegas (Feb 06, 2007 4:13 am) "I traded it in on a 2007 RAV4 4 banger.I will really miss the 48.6 mpg 3 year average, but I will not get "T-boned" trying to exit a parking lot as the Prius just sits there. It has been fun! But it's over!"   I believe that newer Prius models will allow the Traction Control to be turned off, or they modified the computer to allow more wheel slippage in icy conditions. Not sure which one was done, but the newer models are apparently better than 2005 and before. Replies to this message: mommag (Jan 10, 2009 9:34 am)
#20 of 86 finding good replacement tires by sunny9 Apr 04, 2007 (9:02 am)
Need immediate help with suggestion for replacement tires and tire chain.   Just over 41K miles on '05 Prius and two tires need replacing despite dealer rotation(or so they claim) every 5K, along with every other servicing recommended. After an earlier servicing, I had pressures checked a mile from dealer and it ranged from 25-32psi among the four tires, which also had not been rotated. Went back of course and dealer assured it would not happen again. On Monday's servicing this week, service rep at dealership wanted in excess of $560 for a set of ?didn't say what brand? including installation and balancing. I have to think that there is a better price and value out there through a tire dealer, and would appreciate a suggestion on that too.   Since the remaining two tires are not in great shape tread-wise either, I will be going for 4 new ones. Service rep said it was "due to cornering"--hello, 75% of driving done on daily freeway commute between Pasadena to Santa Monica-- one is lucky to travel at speeds as much as 30mph for even a small portion of the distance! Car came with Goodyear P185/65/R15. Bought pkg. #4 for VSC(Toyota patented Anti-skid Control System (www.freepatentsonline.com/4912641.html).   Live in southern CA. Please do not recommend I buy another size tires as I just went through an EXHAUSTING process to buy required (by Highway Patrol)tire cables, non-refundable even though not used, when I had a scheduled meeting in Yosemite Valley in early March.   Love the Prius. Thanks for reading through. Sunny 9 Replies to this message: 210delray (Apr 04, 2007 9:26 am)
#21 of 86 Re: finding good replacement tires [sunny9] by 210delray Apr 04, 2007 (9:26 am)
Replying to: sunny9 (Apr 04, 2007 9:02 am) Check tire rack to order the tires. 41K miles isn't bad, and if you had no complaints, just get the same brand (Goodyear Integrity). Also if you don't have a tire gauge, you should get one and check the tires at least once a month -- don't wait for the dealer's tire rotations.   Tire Rack has a list of recommended installers -- I'm sure there are many in your area.
#22 of 86 Not related to tires by urbandude42 Apr 04, 2007 (8:26 pm)
Prius nightmare is over. Had 2002 prius. New computer, new fuel pump/ gas tank. Oh hell yeesss, they are all one piece on prius! Then the "hybrid" part all went bad within the past year. This was all covered. But I'm done. Got a corolla no problems since.
#24 of 86 new tires, lower mpg by rickhermann May 16, 2007 (2:32 pm)
Our '05 Prius with 37,000 miles just got a new set of plain-jane all weather tires. The tire shop filled them with nitrogen. We ran them at spec pressure on a cross-state trip, then upped the psi in all four tires by 2 psi. Either way, we got significantly lower mpg with the new tires. Driving was on interstate highways in eastern oregon and so. Idaho. We drove very conservatively at had to really be careful to break into the sub-40 mpg range. On similar trips we've averaged 51-53. Could it be the nitrogen, or the newness of the treads? The Toyota dealership couldn't find anything wrong. But somethings wrong. Any ideas? Rick Bellingham Replies to this message: 210delray (May 16, 2007 6:21 pm) pathstar1 (May 17, 2007 1:12 pm) 210delray (May 17, 2007 5:21 pm) capriracer (May 18, 2007 2:12 am)
#25 of 86 Re: new tires, lower mpg [rickhermann] by 210delray May 16, 2007 (6:21 pm)
Replying to: rickhermann (May 16, 2007 2:32 pm) It's not the nitrogen, and adding 2 psi isn't going to make any measurable difference. The tires may have higher rolling resistance than the originals. What brand and line of tires did you get?   But try a few more tankfuls before you give up. Was there a headwind on this one trip?
#26 of 86 Re: new tires, lower mpg [rickhermann] by pathstar1 May 17, 2007 (1:12 pm)
Replying to: rickhermann (May 16, 2007 2:32 pm) There are many posts over on Priuschat and Priusonline about new tires dropping mileage. It's normal. Should improve after 5000 mi. or so. I guess new tires are very "sticky", just like in NASCAR.   Many owners use 42 PSI front and 40 PSI rear for better mileage. Do check the tire sidewall for the max. inflation pressure, and do set the tire pressure when the tires are "cold" (not driven on for 5 hrs.). Replies to this message: 210delray (May 17, 2007 5:21 pm)
#27 of 86 Re: new tires, lower mpg [pathstar1] by 210delray May 17, 2007 (5:21 pm)
Replying to: pathstar1 (May 17, 2007 1:12 pm) Just adding that most passenger car tires now list a maximum inflation pressure of 44 psi, so running with 42 front and 40 rear will be fine. But some tires still have a max pressure of only 35 psi, in which case, you don't want to put in more than this.
#28 of 86 Re: new tires, lower mpg [rickhermann] by capriracer May 18, 2007 (2:12 am)
Replying to: rickhermann (May 16, 2007 2:32 pm) I'm going to address several issues, not just the one in the post I a replying to.   1) It is a little known fact that new tires have more RR than worn out tires, even if they are otherwise identical.   2) Tires designed for hybrids generally have less RR than other OE tires.   3) OE tires generally have lower RR than tires designed for the replacement market.   The above means that if you buy new tires for your hybrid, you should expect redictions in fuel economy, and the amount could be significant if you selected a different tire.   4) If the pressure listed on the sidewall says 35 psi max, then the tire can be safely inflated to 44 psi. However, there is a risk associated with using pressures significantly higher than what the vehicle manufacturer specifies. I consider anything more than than 5 psi as significant and the risk is that the tire will be more prone to impact type failures and punctures.

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