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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Bridgestone Potenza RE050A, RE050A I and RE050A II RFT's!!



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      05-04-2012, 10:09 AM   #1
Three_thirty_I
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Question Bridgestone Potenza RE050A, RE050A I and RE050A II RFT's!!

So I am not the only one a bit in the dark with sales people none the wiser!

Have just fitted a new front pair of 225/45R17 91W Potenza RE050A I RFT - bought from the agents, so one would think that they would advise a person about the different generations etc. The older rear tyres are 255/40R17 94W Potenza RE050A II RFT. Now interestingly the old left front was also the RE050A II, but the slightly younger right front was RE050A I. From what I have read and determined, the RE050A was the original first generation, the RE050A I the second generation and of course then the RE050A II the third and latest generation...

What concerns me, when I spotted this I went searching to see what this was all about, and came across this review and article on the TireRack website - Bridgestone Potenza RE050A II RFT

Quote:
Install Bridgestone Potenza RE050A II RFT tires in sets of four only.

Due to the traction and handling capabilities of the Potenza RE050A II RFT, Bridgestone recommends Potenza RE050A II RFT tires be used in sets of four to provide the best handling characteristics and tire performance. Potenza RE050A II RFT tires may NOT be mixed with other tire models, such as the Potenza RE050A I RFT or Potenza RE050A RFT.
So I spoke to a few fitment centres that specialise in Bridgestone tyres and even they were not too clued up, or a bit vague about this. Spoke to the BMW dealer and this was news to them - funny that they want to insist that you fit BMW Approved tyres, and then they don't even know the product themselves! And for that matter, why does Bridgestone then continue to make older generation tyres alongside their newer generation?!

It's very frustrating...
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      05-04-2012, 11:19 AM   #2
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I've been wondering the same thing. Perhaps Gary can offer an opinion...

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      05-04-2012, 03:50 PM   #3
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isnt tire which came from factory already been mixed with those two type of tires?
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      05-04-2012, 06:40 PM   #4
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You mean from BMW when bought new? Not sure, my car was pre-owned and came with those horrible Continental SC2 RFT's.
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      05-07-2012, 12:26 PM   #5
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Okay, a bit of an update from my side:

Spoke to a technical person at Bridgestone and he seemed to insist that there is no problem mixing these tyres, however since the construction is slightly difference (plus now I see that there are differences in tread depth, width and even diameter), so it will be a problem on the same axle - might cause a certain degree of tyre pull. But same pairs on the same axle should be fine, I would think especially when you have narrow/wides etc.

But, I still am concerned that Tirerack makes a point to say that Bridgestone suggests that you may not mix them...
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      05-10-2012, 11:37 AM   #6
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How do you like those tires btw?
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      05-10-2012, 01:29 PM   #7
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Well, pretty impressed and happy with them. The car feels very neutral and responsive for me compared to the Continental RFT's. Maybe not the quietest tyre, but rather have slight noise than terrible unstable handling...
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      05-11-2012, 04:54 PM   #8
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How can you tell which tires you currently have? I didn't see anything noting a I II or nothing on the tires.
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      05-12-2012, 12:34 AM   #9
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So here's whats on my car, and how I got here (2011 335d m-sport):

Rear: RE 050 A, no designation of I or II, so I'm thinking they were first gen. The BMW dealership put them on the car at about 18k.
Front: Original OEM from the factory RE 050 A I. I'm about to have these two replaced tomorrow after a major alignment issue has worn both outside front edges, although the car tracks straight... we'll see what i end up with tomorrow!
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      06-10-2012, 12:14 PM   #10
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From further reading and speaking to local Bridgestone people, these are just variants of the Potenza RE050 tyre model, A being the first improvement version followed by I and II - also seems to be related to where the tyres are made. For instance, here we get the RE050A I which are made locally, but the RE050A II are still being imported from Japan for the rear sizes. So it seems that as long as you have the same model version on both ends of the same axle it is fine!
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      06-10-2012, 06:48 PM   #11
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I'm pretty sure I saw a post around here not too long ago saying that the "I" model is not as harsh riding as the "II". Most of the LCI 335s I see now have the "I". My car was a 2006 and came with the "II". Also, according to tire rack there are also V and W rated versions of the "I" at least in the 17 inch sizes. Confusing.. Heh.
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      06-11-2012, 07:07 AM   #12
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Well, according to tirerack there are some slight differences in rolling diameter and tread depth between these two versions, and according to the Bridgestone techie that I spoke to, there is also a slight difference in construction. Also, if mixing on the same axle, might experience mild tyre pull from one side...
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      06-13-2012, 08:17 PM   #13
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Quote:
Originally Posted by Three_thirty_I View Post
Well, according to tirerack there are some slight differences in rolling diameter and tread depth between these two versions, and according to the Bridgestone techie that I spoke to, there is also a slight difference in construction. Also, if mixing on the same axle, might experience mild tyre pull from one side...
Thanks for the info. I always wondered what the difference was...
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