I think the differences are irrelevant. Just get the ones you want and feel comfortable with.
Steve
DOC Pres

 

The rated diameter isn't all that accurate. There's a difference in size, it's just smaller than they care to rate, but it will impact your speedo.

 

Pres: I tend to agree with your comments and was thinking along those lines anyway.

Beast: Thanks for your input and, while I agree there could be a small change in the speedo, I don't think it'll affect me the way I drive.

As we all do sometimes, you just focus on an aspect and want to really find out why something was done or spec'ed a certain way. In some cases, we'd like to think there was some super duper special reason behind a given issue, but many times the reason is cost cutting or simply because that's what they had "on hand" at the time.

Don

 

If they're the same diameter, how can they have a different rolling distance?
If they're that close in size, the speedo won't see any difference.
Steve
DOC Pres

 

Do you know what brand/model tire you want to run? If so, maybe it'll be decided for you as that tire's only available in one of the 2 sizes.

I took a quick look at specs and it's a toss-up.

 

They round to the same diameter but they're not the same diameter.
I found a tire calculator and 30.50" versus 30.56" is a tiny difference (in this case only 0.14 mph at 70mph.) So meh, disregard my last. lol Next time I'm getting the 265s.

 

There now! See what kinda good stuff can come from a seemingly innocuous question from a second time D owner. :bugeyed: :bugeyed: :bugeyed:

I'll be hanging out in Dayton, Ohio for the next three days at the largest Ham Radio Convention/Flea Market in the good old USA. If you like anything to do with electronics, this is the place to be. If ya want to check it out, www.daytonhamvention.com

I'll have the laptop, so ya won't miss me too much. :wall: :wall:

Don

 

Stumbled upon a set of black wall Goodyear SRA's in 245/45R17 size on Craigslist the other day so I called the fellow and he said they were in the 8/32nds range and worn evenly. Figured I couldn't go wrong with an asking price of $80 for a set of four.

When the time comes to put them in service, I'll report on any differences I come across vs the OEM 265/65R17's, although I don't expect any.

Don

 

My last post in this topic was a senior moment as the correct tire size should be 245/70R17 like the title of this thread reads.

Anyway, I spent the morning at the local Walmart getting the OEM Goodyear SR-A 265/65R17's replaced with four 245/70R17 tires I picked up back in May. They're blackwall instead of OWL, but don't appear to be near as weathered and have little to no age cracks in them. The fronts are at 8/32nds, and the rears are at 7/32nds. The original tires were 5-6/32nds with one at 9, no doubt a replacement somewhere along the way.

I can see/feel no difference whatsoever between the two sizes and, since they're very close to identical, I expected as much. Jusy kind of makes one wonder why they'd make two different sizes that are so close to start with??

Oh well, make that the 9th wonder of the world.

Don

 

Well, all I can say is Ohio gets snow and a wider tire would provide that much more traction. Maybe see if you can't get a tire shop that has some in stock to mount them and see if they rub and how they look?

 

A wider tire may give more traction but a skinnier tire cuts through snow better, :mrgreen:

 

A wider tire may give more traction but a skinnier tire cuts through snow better, :mrgreen:

Actually I take that back. I read an article that says most people think a wider tire provides more traction with more surface area, but a skinnier tire "bites" the ground better. Just a thought.

 

You were right the first time. If the second were true you'd see F1 cars on motorcycle tires instead of the supewide meat that they run.

 

Tire rack says that the 65 series tire is 8.2 inches wide and the 70 series is 7.7 inches wide. If I'm ciphering right as Jethro would say, that's a half inch. Not as much as I'd have thought, but still not a big difference in the total picture.

Overall, not a bad set of tires for $140 bucks installed.

Don