Is that GP4000s still usable (broken sidewall)?

bikingjohn
bikingjohn Posts: 202
edited September 2012 in Road general
Rode the Continental GP4000s front and rear for around 800km, rear tire sidewall broken at the plastic mould. I usually pump them up to 110psi (rated Max 120psi).
wpid-IMG_20120912_202515.jpg

More images at
http://chup.info/c/2012/09/broken-tire- ... l-gp4000s/
2015 Trek Domane 4.5 Disc
http://chup.info/c/tag/trek/

Comments

  • DavidJB
    DavidJB Posts: 2,019
    no. bin it.
  • tiredofwhiners
    tiredofwhiners Posts: 598
    Could be, if you cut an old tyre up and stick a section of an old tyre inside it, but it'll be a risk.

    It all depends upon whether the kevlar threads in the sidewall have been severed - if they have then its time is very limited.
  • gezebo
    gezebo Posts: 364
    Lol, Would you drive a car with a split sidewall like this?
  • DevonClimber
    DevonClimber Posts: 90
    I have replaced tyres with less damage than that, expensive I know but bin it and replace.
    “If you do what always do, you'll get what you always get.”
  • danowat
    danowat Posts: 2,877
    Unless the inner tube is poking out when you pump it up to the right pressure, I'd carry on using it.
  • Ec0
    Ec0 Posts: 24
    well if it causes a crash and smashes you/your bike/both up then you'll probably be wishing you'd just gone ahead and replaced it.

    Personally I'd get it replaced
  • drlodge
    drlodge Posts: 4,826
    If its just a slit in the outer rubber than it'll be fine, but the way that crack is open I'd say its structural...so bin it.
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  • GavH
    GavH Posts: 933
    That's a £30-35 replacement at most. Why take the risk of that tear causing you to come off your bike and do yourself (or god forbid the bike!) some serious damage?
  • danowat
    danowat Posts: 2,877
    Bloody hell, talk about dramatic..........
  • Tom Dean
    Tom Dean Posts: 1,723
    GP4000S are a brilliant all round tyre on paper. The sidewalls are the weak point. Bin it.
  • Tom Dean
    Tom Dean Posts: 1,723
    danowat wrote:
    Bloody hell, talk about dramatic..........

    :lol: yeah I've done a couple more rides on a tyre like this while waiting for a replacement, but better to be safe than sorry.
  • tiredofwhiners
    tiredofwhiners Posts: 598
    gezebo wrote:
    Lol, Would you drive a car with a split sidewall like this?

    Its a bike not a car. the two are not the same - not even close.
  • smidsy
    smidsy Posts: 5,273
    tiredofwhiners wrote:
    gezebo wrote:
    Lol, Would you drive a car with a split sidewall like this?

    Its a bike not a car. the two are not the same - not even close.

    Your right there - never known anyone fall off a car with mechanical failure :shock:

    The only thing keeping you on the road is a 20mm wide piece of rubber - it cost £30ish to replace so why take the risk.

    Same principle with motorcylists - many a time when picking up a crashed racer they are heard to say 'I knew I should have put the new tyre on'. Broken collarbone and £3000 damage later - oops.
    Yellow is the new Black.
  • danowat
    danowat Posts: 2,877
    If a "blow out" (and lets be honest, cycle tyres don't "blow out", they just deflate very quickly) caused you to fall off, I'd argue "you" have questionable bike handling skills....
  • gabriel959
    gabriel959 Posts: 4,227
    danowat wrote:
    If a "blow out" (and lets be honest, cycle tyres don't "blow out", they just deflate very quickly) caused you to fall off, I'd argue "you" have questionable bike handling skills....

    Don't be so quick to judge what you might not know. Depends on the blowout...

    Observe this thread in weightweenies for the damaged caused by a blowout, same tyre as well :|

    http://weightweenies.starbike.com/forum ... e4c24c3881
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  • GavH
    GavH Posts: 933
    danowat wrote:
    be honest, cycle tyres don't "blow out", they just deflate very quickly)

    The rear tyre on my Raleigh MTB blow out when i was a kid. At least 'blow out' is what I'd call the bulge on the side bursting, instantly deflating the tube, tearing a hole in the sidewall and making a noise that at the time, I thought was a gunshot.

    So, "cycle tyres" do "blow out". Whether the OPs will is a debateable matter, which for £30, isn't a debate I'd even bother having.
  • cougie
    cougie Posts: 22,512
    danowat wrote:
    If a "blow out" (and lets be honest, cycle tyres don't "blow out", they just deflate very quickly) caused you to fall off, I'd argue "you" have questionable bike handling skills....

    Depends where it happens - if its a straight road - yeah you'll probably be OK. If you're turning and it goes down - that could get messy very quickly.
  • gezebo
    gezebo Posts: 364
    tiredofwhiners wrote:
    gezebo wrote:
    Lol, Would you drive a car with a split sidewall like this?

    Its a bike not a car. the two are not the same - not even close.

    Yes, you are right. Cars don't fall over when a tyre bursts at 40mph going round a bend. They are also designed to offer some form of protection to the driver when they crash. For the sake of 30 quid I know what I'd do. Each to their own I suppose.
  • bikingjohn
    bikingjohn Posts: 202
    Thanks all for your help~ I will swap both tires to Durano S for the sake of safety first :)
    2015 Trek Domane 4.5 Disc
    http://chup.info/c/tag/trek/

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