EthanV

My dad bought a used Honda CRV 2004...It got 16in rims from pilot i guess. The original tire sizes are; 205/70/15(factory rim 15in)..... The old owner got the front and back tires are different.. front are 205/55/16.. the back are 205/60/16. I had gone to this website and the closest one is 205/60/16 what it said was Speederodormeter reading 2.3% too fast when you travel 60mph , you are actually travel 58.6mp... and another one close to it is: 205/65-16 speederodormet reading too slow 0.7% when you travel 60mph you are actually travel 60.4mph.... Im not sure which tires to buy. Can someone help me or I have to take it to the tires shop some are not knowleged I hope I dont get 4 new tires wrong. Thanks !

blacksc400

iTrader: (4)

You answered you own question, get the 205/65/16 then since it's closest to stock reading. 0.7% barely makes a different in real life driving, and it's still pretty meaty for plush drive.

bitkahuna

iTrader: (20)

go to discount tire, they'll take care of you.

EthanV

THank guys.

mmarshall

Definitely, if your dad's CR-V is an AWD model, use all four tires the same size...preferably the stock size it was designed for at the factory. Different-size tires, or brand-new vs. tires of the same size, will cause the four wheels to continually rotate at different speeds, over-taxing the center-differential by causing heat build-up and shortening its life....and a center-diff is an expensive piece of equipment. And, preferably, as I noted, keep the tires the stock size......under or over-sized tire-diameters, as you note, will cause the speedometer and odometer to read fast or slow.

EthanV

THe CRV is 2004 AWD ...We did not have original rims which are the 15ins.. It's an beater car to get around and to go work so can I still use that 16in rim and buy 4tires 205/65-16.. Front and back are same sizes? Thanks Should I described the size above the 205/65/16 is the closet to the original size 205/70-15. Is it gonna harm the center diff? Please adivse again.

mmarshall

What will stress the center-diff, over time, is front-vs.-back tires (and in some cases side-to-side), unequally-worn or different sizes that affect the outside-rolling diameter of the tire. The idea, with a car-based center-diff AWD system (which the CR-V has) is to have all four tires rolling at the same RPM or as close as possible. This is also why tire-pressures are also important; to keep them at recommended PSIs.......all else equal, lower PSIs usually means slower wheel rotation (and more drag).


Center-diff AWD systems are designed to correct for differences in front/rear tire RPM.....that's how they keep traction on slick surfaces. To do that, they rely on internal clutches or a viscous-fluid system to transmit (or re-direct) torque to the wheels that have the most traction and are not spinning. But they are designed to do this only for short periods of time, until normal traction is regained on all four wheels. Different-size or differently-worn tire-diameters continually tax the center-diff until a lot of heat builds up...the (mechanicals inside the diff never get a rest). This, of course, over time, can affect its service-life.

As far as changing the tire-size on all four tires from the factory-original, it probably won't harm the center-diff as long as all four tires are new and of the same size. But larger-than-stock tire-diameters can make the speedometer/odometer read low, and smaller-than-stock tire-diameters can make them read high, because those instruments are electronically-regulated by wheel-RPMs....not a spinning cable hooked to the transmission like on cars decades ago.

EthanV

Thanks for the lessons. Im considering to buy 205/65-16. They are 0.7% speedordormeter reading slow and like the suggestion above that the close to the stock.

I8ABMR

go with Michelins

blacksc400

iTrader: (4)

^^^ +1, has to be Michelins!