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Inner Tubes - A little help please

  • 29-04-2009 06:34PM
    #1
    SteM
    Registered Users, Registered Users 2 Posts: 7,204 ✭✭✭


    I've got my second puncture in a week today and want to replace the inner tube as it's looking a bit worn. I took out the tube that's there and it's a Continental Tour 28 Slim 28 x 1.1/8 1.3/3 1.5/8 and it's got what looks like a dunlop valve.

    Can anyone tell me if that's this tube but just with a different valve (the ones in the link are schrader and presta).

    http://www.chainreactioncycles.com/Models.aspx?ModelID=18906

    Can anyone tell me what those numbers on the tubes refer to as I would love to know? Why does every bloody tube I look at seem to have a different way of sizing?

    The last time I was in the bike shop I asked the guy for a spare tube to have just in case (he'd just replaced the one on the front tyre), I've just checked the one that he gave me and it has a presta valve which I don't have a pump fitting for. Should he not have given me one with a dunlop valve as that was was there already? Does it matter what type of valve you have because the presta valves look thinner than the schrader and dunlop valves.

    Sorry lots of dopey questions, I know!


Comments

  • #2
    blorg
    Registered Users, Registered Users 2 Posts: 15,995 ✭✭✭✭blorg


    Some useful information here. Dunlop would be very rare these days, sure it isn't Schrader? According to Sheldon you use a presta pump on Dunlop.

    Regarding compatibility, that looks like the same tube, e.g. 700x28-37 (metric designation is more commonly used with road bike tubes.) The only compatibility issues as far as I am aware are that the valve has to fit through the hole in the rim, obviously a presta will fit through a schrader hole but not vice versa. You will need the correct pump head for each although you can get an adapter for a presta that turns it into a schrader.


  • #3
    kona
    Registered Users, Registered Users 2 Posts: 7,525 ✭✭✭kona


    blorg wrote: »
    Some useful information here. Dunlop would be very rare these days, sure it isn't Schrader? According to Sheldon you use a presta pump on Dunlop.

    Regarding compatibility, that looks like the same tube, e.g. 700x28-37 (metric designation is more commonly used with road bike tubes.) The only compatibility issues as far as I am aware are that the valve has to fit through the hole in the rim, obviously a presta will fit through a schrader hole but not vice versa. You will need the correct pump head for each although you can get an adapter for a presta that turns it into a schrader.

    some of the cheaper bikes still use woods believe it or not, pain in the hole to pump up.

    OP, you should get away wih either a schrader or a presta in your rim as the woods has a broad base. Woods valves are known to wear at the rubber bit on the inside of the valve, these can be replaced cheaply. So make sure its not your valve at fault.

    Woods=Dunlop
    For a 700c tube id go with presta as they are the most common in this size.


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