Leaky tubes

Discussion in 'Bicycle Mechanics and Repairs' started by woohoo, 24 Jun 2008.

  1. woohoo

    woohoo Veteran

    I bought my son a Giant SCR 2 last year (an absolute bargain at £385) and we are both very happy with it except… the tyres won't hold their pressure. I run my clinchers at about 100/110 (front/rear) psi and after a week or so they've maybe gone down to about 90/100 but with the Giant the pressures will have gone down from 100/110 to about 60/70. The tubes aren't p**ctured but just seem to be leaky (sounds like Liquigas but there the resemblance ends ;))

    Now I know that it's no big deal to get the track pump out but is this 1) normal and 2) can anyone recommend some non-porous tubes please.
  2. John the Monkey

    John the Monkey Frivolous Cyclist

    Does it still have the Kenda Kontenders on it?

    I was unimpressed with them, to say the least - if the tubes are of equal quality...

    Regarding 1), I don't think it is - I check my tyres every week or so, and can't remember them having lost 40 psi over that time ever.

    Regarding 2) I've used Michelin AirStop, Schwalbe and Continental Race 28 tubes, and any of those would suit, I daresay. I like the Contis best, but that's more because of the yellow dustcaps ;)
  3. You have leaky tubes, not unusual with OEM, just buy some decent new ones.
  4. OP

    woohoo Veteran

    Thanks for the replies.
    Yes there are/were the standard fitment. I've only ridden the bike a couple of 100 metres so I can't really pass any comment.

    Anyway, I'll buy a pair of decent tubes and use the originals as spares.
  5. RedBike

    RedBike New Member

    Beside the road
    I can't belive your tubes have lasted this long with Kontender tyres!
  6. Why use crap tubes as spares? Buy four new tubes and be done with it.
  7. OP

    woohoo Veteran

    'Cos I'm tight (and proud of it :evil: ) and the spare will only be used as a "get me home".
  8. mondobongo

    mondobongo Über Member

    False economy if you ask me, plenty of good deals on buying 5 or 10 tubes at the moment. Why have the hassle of changing a tube twice, when you could fit and forget for a couple of quid.
  9. John the Monkey

    John the Monkey Frivolous Cyclist

    My advice;


    At least. If you're keeping the Kenda tyres on, you'll need them, unless a troupe of minions sweeps the road ahead of you as you ride.
  10. Joe24

    Joe24 More serious cyclist than Bonj

    Mine lasted about 2000miles;)
    The only time i had to change the tube was when i ripped the valve off after pumping them up because the pump didnt let go and i was too hand fisted.
    But i will just change the tubes after a puncture because my Specilized tubes cost me £1 and they are decent tubes.
  11. Young Un

    Young Un New Member

    Joe where do you get your tubes from??
  12. John the Monkey

    John the Monkey Frivolous Cyclist

    I think they had the tyre quality inspector in on the day they made the set on your bike Joe...
  13. goo_mason

    goo_mason Champion barbed-wire hurdler

    Leith, Edinburgh

    I'd second that. The Kendas on my SCR2 were awful. Every stone or tiny piece of glass went right through them. I had more flats in the first 2 - 3 weeks riding it than I had in the previous 2 years.

    The Schwalbe Stelvios I replaced them with have been brilliant. I won't say more than that, as a certain fairy might be listening.... :becool:
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