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Thread: Bridgestone S21 Launch

  1. #91
    Join Date
    6th June 2008 - 17:24
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    The Vixen - K8 GSXR600
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    Looks like I might have to replace the 4500km old rear S21.

    A month or so ago I noticed a slow leak in the back tyre. Had to pump it up before I went out - which was not that often recently due to diseases brought home by grandchildren, shit weather and total laziness on my part. Then it was losing 12psi per day with a bit of use.

    So I had it fixed - bit of wire stuck through it - but it kept going down still, albeit more slowly. Took it back for another go (no charge for this one thanks to Boyds ). Better results but there is still some bubbling when tested with spit or soapy water. Very slow this time - no measurable drop per 24 hours so far. But it does leak.

    At 4500, the tyre is beginning to lose shape but has plenty of central tread yet. Don't really want the cost of changing it. But I think I will anyway because I am never too happy on a leaky tyre. Who knows when it will leak real fast one day. In a corner. With a truck and trailer coming the other way. On your side of the road. On a narrow wet road with crap surface. And a wild sheep in your path. You know the deal.

    Might hafta cough up.
    . “No pleasure is worth giving up for two more years in a rest home.” Kingsley Amis

  2. #92
    Join Date
    20th June 2011 - 20:27
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    BMW XChallenge, GSXR1250fa, CBR1000rr
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    Glen Eden
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    Thinking of chucking one on the front of me 1250 Bandit. Could be good for summer.
    Quote Originally Posted by Katman View Post
    but once again you proved me wrong.
    Quote Originally Posted by cassina View Post
    I was hit by one such driver while remaining in the view of their mirror.

  3. #93
    Join Date
    25th March 2004 - 17:22
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    RZ496/Street Triple R/GasGas/ etc etc
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    Wellington. . ok the hutt
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    15,241
    Just put some Goodyear Cargos on the van. Perhaps those would be more suited?

    Just jammed a new 21 on rear of 675. Mileage. . . Never recorded. Seemed ok last 2700 was touring SI with panniers.
    I've been told. Dreaming`s free.
    Think I'll go, back to sleep.
    Everybody listen, voices in my head
    Everybody listen, do yours say, what mine says?

  4. #94
    Join Date
    14th July 2006 - 21:39
    Bike
    2015, Ducati Streetfighter
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    Christchurch
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    Running Rosso III's on the Ducati. 1000 kms passed now on the pair.

    Previous rears (Rosso Corsa and Rosso II) had died at 5k each - stock front Corsa did 9k.

    It's taken a bit of experimenting with tyre pressures on the front Rosso III to get the right 'feel' but I'm now happy. Only 1k down on the rear so far but given the 'D' logo imprinted in the centre maybe 0.5mm tops has just dissolved last weekend early signs are the rear will outlast the previous pair. Time will tell.

    Stick really well, and now I've played with front pressures the feedback is good.

  5. #95
    Join Date
    20th June 2011 - 20:27
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    Quote Originally Posted by F5 Dave View Post
    Just put some Goodyear Cargos on the van. Perhaps those would be more suited?

    Just jammed a new 21 on rear of 675. Mileage. . . Never recorded. Seemed ok last 2700 was touring SI with panniers.
    Hope they have improved Goodyears, last ones I had were crap. But that was good a few years back...

    Ended up fitting a metzeler interact 01.
    Quote Originally Posted by Katman View Post
    but once again you proved me wrong.
    Quote Originally Posted by cassina View Post
    I was hit by one such driver while remaining in the view of their mirror.

  6. #96
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    3rd November 2007 - 07:46
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    KTM 1290 SDR
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    Palmerston North
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    I'm back with a set of S21's again. After back to back comparisons the S21, PP3 and Power RS, I much prefer the S21. I got 6k out of each rear, but longevity may just go to the RS as it was in slightly better condition when removed.
    Nunquam Non Paratus

  7. #97
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    24th July 2006 - 11:53
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    Quote Originally Posted by Owl View Post
    I'm back with a set of S21's again. After back to back comparisons the S21, PP3 and Power RS, I much prefer the S21. I got 6k out of each rear, but longevity may just go to the RS as it was in slightly better condition when removed.
    Just put PR4s on both ends of the SDR. Wasn't particularly impressed with the S21 rear on tour last year, and there's another trip south pending.
    Go soothingly on the grease mud, as there lurks the skid demon

  8. #98
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    3rd November 2007 - 07:46
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    Quote Originally Posted by Ocean1 View Post
    Wasn't particularly impressed with the S21 rear on tour last year, and there's another trip south pending.
    Yeah a friend of mine wasn't overly impressed with the rear (S1000RR) until he fitted a front. Then reckoned it transformed the bike and he's sold on them now.

    I wasn't a fan of the PR4, but got 10k out of the rear. That front will last a lifetime if my 16k out of a PP3 is anything to go by.
    Nunquam Non Paratus

  9. #99
    Join Date
    24th July 2006 - 11:53
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    Quote Originally Posted by Owl View Post
    Yeah a friend of mine wasn't overly impressed with the rear (S1000RR) until he fitted a front. Then reckoned it transformed the bike and he's sold on them now.

    I wasn't a fan of the PR4, but got 10k out of the rear. That front will last a lifetime if my 16k out of a PP3 is anything to go by.
    Had a matching pair. No problems with the front, and to be fair touring on very aggressive roads in the wet isn't what they're designed for. My reasoning in buying sprots tyres for mixed riding duties was that they would perform better "at need" across the board at some costs in terms of longevity, but the back let go dramatically several times in straight line in the wet. Not immediately or hugely dangerous but not confidence inspiring.

    So with more touring planned I went the more sensible way. I loved both PP2s and PR2s, didn't like the soft squirmy carcasses in the PR3 but the 4 feels a lot better. If not for the tour I'd still go for the original OE Dunlops.

    Having said all that I'm convinced that most perceptions of performance is down to the few wee niggles you get with any given tyre that are mostly unrelated to the tyre itself. But it's hard to have confidence in a tyre you've had some bad results with, no matter the cause.
    Go soothingly on the grease mud, as there lurks the skid demon

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