Who's running Potenza RE970AS?

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Originally Posted By: Volvohead
My understanding is that the compounds used in A/S and winter tires are not that dissimilar. The key difference is in the tread pattern optimization........


I'm going to take issue with this.

While the tread pattern is indeed quite different between All Season and Winter tires, the compound is also quite different - different enough that a winter tire would perform significantly differently than an All Season tire.
 
Originally Posted By: CapriRacer
Originally Posted By: Volvohead
My understanding is that the compounds used in A/S and winter tires are not that dissimilar. The key difference is in the tread pattern optimization........


I'm going to take issue with this.

While the tread pattern is indeed quite different between All Season and Winter tires, the compound is also quite different - different enough that a winter tire would perform significantly differently than an All Season tire.


Differently how? Elaborate.
 
Yes, how so Capri Racer?? (I am questioning because I REALLY want to know, and NOT because I am calling out your expertise on this topic, as you have forgotten more than most of us will ever know about the 'round and black' objects!
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I understand that a pure winter tire must be more elastic in brutally cold (-50*F+) ambients, and all seasons MUST be able to handle extreme Tejas summer heat (up to 125*F ambients), BUT there has to be a fair amount of compounding 'crossover' in between these two extremes, no???
(And of course I am ONLY asking about DRY conditions in the cold, NO moisture whatsoever.)
 
DD,

I can only relate what one of the chemists who work with these compounds privately confided to me (won't tell me all the technicals . . . NDA obligations). And that is that the winter compounds are indeed different, in the sense that they retain their effective elasticity much lower than the -10 to -20 F. point at which the A/S compounds start to plasticize (as I said, these things are all compromises). That is meaningful in more "arctic" conditions. But I was adamantly assured that at more temperate ambients, the A/S compounds were just as effective and flexible as the winter compounds. This was before the "nano" technology came out, so things may have blurred a little since then.

The last time I drove at -10F, I was a very, very young man. So that is why, at least where I live now, I don't consider it a meaningful difference at the moderate winter temps we normally encounter.

If CR has some additional information to share on the topic, I would love to know it, as these things interest me (or I wouldn't be here).
 
Back to the original topic:

A set of RE970ASes are going on the R tomorrow.

Initial report to follow shortly. Stay tuned.
 
Originally Posted By: dailydriver
I'm curious if B-stone has changed/improved their summer part of the compound of this tire over the 960s.

I personally had no complaints about 960's summer performance, as far as all-season tires go. If there was anything to improve, it would be winter performance.
 
Here are the initial drive-home impressions of the RE970AS. A mix of curvy suburban back roads and fresh macadam highway. Temps in very high 90s. Total mileage is under 100 miles.

So these first observations should be taken with considerable salt until the tread settles in.

However, I think I have enough time in to say that the RE970 is a good compromise between the DWS and the A/S+ for comfort, noise and steering response/tracking. The 970 does not have the razor sharp feel of the Michelins, but is not slightly vague feeling like the Conti can be at times. It thankfully covers road impacts almost as well as Conti, as opposed to the Michelin, which could be jarring at times. The 970 has a tendency to noisy thumping over bumps (vs. the Michelin sometimes ringing), but nothing bad. All in all a very comfortable ride for a 40 series, with very good steering feel and response.

As I was looking for a slightly more relaxed ride without giving up too much handling, if the 970s continue like this once broken in they will have accomplished that goal. It seems a slightly softer feeling tire than the Michelin, but in a good way.

No hard handling or breaking observations to report, as the treads are not settled in. These are easy scrub-in miles. But the vehicle has completely acceptable breaking modulation and distances right out of the box.

Some qualifiers:

1. I have owned the Contiextremecontacts on this model, but have only driven the DWS on other vehicles I do not own.

2. I have owned the Michelin PS A/S on this vehicle for over 6 years, but have only driven the PS A/S+ on other vehicles I do not own. My Michelin comparisons are to examples fairly new.

Some other initial issues:

These tires were road-force balanced and the car aligned. The vehicle generally tracks arrow straight and vibration-free through hwy speeds.

1. The steering wheel is now off-center by about 3-5 degrees (just enough to annoy). That is being corrected next week, and could have affected steering response and feel.

2. While road force balancing should have caught any radial pull issues, the vehicle has a new tendency to drift right ever so slightly on long straights. While it is likely just a road crown drift, the tires are being completely rechecked next week just to be sure. I have had radial pull plagued Bridgestones in the past. One tire needed more weights than I like to see - the others look like they needed almost none. If any are bad, they are ALL going back for another brand. I expect very high manufacturing quality and low-agg at this price point.

Another thing I do not like are date stamp impressions that extend over 1/8 inch deep into the sidewall rubber. Small holes. Never seen that before on any tire, and not happy about it on an XL 95W rated 40 series sidewall. I have messages out to confirm that this is an acceptable manufacturing detail. These 970s are Mexican not Japanese made.

More should follow later once the above issues are ironed out and more miles pass.
 
Originally Posted By: Volvohead
The 970 has a tendency to noisy thumping over bumps

Sounds like nothing's changed since the 960 then.
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Originally Posted By: Quattro Pete
Originally Posted By: Volvohead
The 970 has a tendency to noisy thumping over bumps

Sounds like nothing's changed since the 960 then.
smile.gif




I've never driven 960s, so I can't say that is the case.

The 970 is supposedly a better tire in the wet and snow than the 960 was. Time will tell.

A thumping 970 or a ringing A/S+ . . . not that serious or important. These aren't marshmallow GT tires.

It certainly is a good-looking tire.
 
I wouldnt even review a tire until you put at least 500-1000 miles on it so it breaks in and wears off the mold release junk etc.

I thought the xice xi2's were REALLY horrid but after 600 miles they were fine.. better than the all seasons actually.

pretty similar for my blizzack ws-70's you could practically feel them firming up day by day.

Went from massive squirm to reasonable for winter tires.
 
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Originally Posted By: Rand
I wouldnt even review a tire until you put at least 500-1000 miles on it so it breaks in and wears off the mold release junk etc.

I thought the xice xi2's were REALLY horrid but after 600 miles they were fine.. better than the all seasons actually.

pretty similar for my blizzack ws-70's you could practically feel them firming up day by day.

Went from massive squirm to reasonable for winter tires.

Make that 5k, IMO. But initial impressions are certainly still worthwhile, and the OP made it clear that these were initial impressions only.
 
Originally Posted By: Rand
I wouldnt even review a tire until you put at least 500-1000 miles on it so it breaks in and wears off the mold release junk etc.


Originally Posted By: The Critic

Make that 5k, IMO. But initial impressions are certainly still worthwhile, and the OP made it clear that these were initial impressions only.


I think I made it plain that the initial observations were cursory and concerned matters independent of scrub-in: NVH and ride comfort.

And waiting 5k to first assess a tire is ridiculous.

With this kind of response, why bother.

Maybe I'll follow up in another five years.
 
Originally Posted By: Volvohead


I think I made it plain that the initial observations were cursory and concerned matters independent of scrub-in: NVH and ride comfort.

And waiting 5k to first assess a tire is ridiculous.

With this kind of response, why bother.

Maybe I'll follow up in another five years.


While I appreciate the fact that you mentioned initial impressions, ride comfort and NVH can also change. You might need thicker skin. I wasnt bashing your post I was saying check back in a few weeks with updates. Sorry you took it the wrong way.

I dont see the need to wait 5k for a review either.. although an update at 5 or 10k is very relevant.
 
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Originally Posted By: The Critic
Make that 5k, IMO.

Which characteristics of a tire would you expect to be different at 5K vs. 1K miles?

Or are you just recommending waiting longer to get a larger sample of experiences before expressing an opinion? That's understandable.
 
Volvohead, any more feedback on these RE970s now that you've had them for close to a month?

I just looked at my rear tires and one is almost at wear bars, so I may have to accelerate that new tire purchase plan...
 
Been busy with our SL, and we swapped out one of the RE970s (marginal for balancing), adding to scrub in time.

But I think I have enough miles in to say that this tire is every bit as precise as the old PS A/S, but without the edginess at the limits and with quite a bit more comfort. Since we just picked up a set of Conti DWS tires (and can compare all three), I would say that the RE970 hits the sweet spot of the performance/comfort curve between the Conti and the Michelin. Between the Michelin and the B-Stone, I like the RE970. If I were tracking, it would be a toss-up, as the Michelin is still slightly more communicative (perhaps too much so for a DD).

No comment on cold/winter performance, as it's still summer. And I can't say how this tire will be with 10 or 15kmiles on it. But new, this RE970 would be my first choice in a UHP A/S tire, with the DWS a good second choice for someone willing to tolerate some vagueness in response for even better road comfort.
 
These new tires would be for the 530i which currently has RE960s. I've got a separate set of winter wheels/tires for this one. The RE960's winter performance is dismal, but I knew it even before I bought them.


The C300 has a fairly new set of Conti DWS. I find them a bit on the noisy side (compared to the OEM ContiProContact), but no complaints otherwise.
 
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