Inner tubes

Questions about purchasing bicycles and parts

Inner tubes

Postby TriggerFish » Mon Mar 05, 2007 7:56 pm

Howdy all,

Probably a really stupid question, but, how do I tell what size inner tube to buy? After having repaired my first puncture the other day, I thought that it might be prudent to stock up on tubes.

My tires are 700 x 37c I believe, but, I don't know that that is the measure to use. I thought I might buy online as there was some other things that I wanted from a particular store, so knowing the size beforehande would obviously help :).

Any help would be greatly appreciated. About to hit up mr google as well :wink: .

Regards,

TF.
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by BNA » Mon Mar 05, 2007 8:11 pm

BNA
 

Postby TriggerFish » Mon Mar 05, 2007 8:11 pm

Like I always say, Google is your friend.

Tire Sizing was quite interesting as was the article on tires and tubes by the same chappie.

Still leaves me head scratching a little. Take these offerings for example. The 700 value is right, but the xxC value is smaller. Does that matter?

Thanks again,

TF.
Last edited by TriggerFish on Mon Mar 05, 2007 8:25 pm, edited 1 time in total.
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Postby europa » Mon Mar 05, 2007 8:18 pm

Tubes will stretch amazing amounts and are usually/often expressed in ranges of widths. Just get one that says it'll handle your width tyre and you'll be right, even if it also says it'll got inside a stick of spaghetti.

Richard
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Postby 531db » Mon Mar 05, 2007 8:35 pm

I'm with Europa on this one.

For some reason tubes appear to be generally available with presta valves in 2 widths only:
19/23C and 32/35/38C.

Use 19/23C in 19 to 28C tyres and 32/35/38C in 32 to whateverC tyres.
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Postby mikesbytes » Mon Mar 05, 2007 9:03 pm

Mountain Equipment Co-op Cycling

They have presta 700 x 28-32 and 700 x 35/43c tubes

I wonder if you could use a 27" tube from Kmart ?

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Postby 531db » Tue Mar 06, 2007 12:24 am

mikesbytes wrote:


"I wonder if you could use a 27" tube from Kmart ?"

Not with a Schaeder valve as all KMart/Big W tubes seem to be.

And why is it that these same two chain stores continue to stock 27" tubes and tyres, and have never stocked 700C, depite in the case of Big W at least, selling 700C wheeled bikes?

Shows how much they know about bikes I suppose.....
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Postby stryker84 » Tue Mar 06, 2007 7:02 am

531db wrote:And why is it that these same two chain stores continue to stock 27" tubes and tyres, and have never stocked 700C, depite in the case of Big W at least, selling 700C wheeled bikes?


Since the main bike-buying demographic for those 2 stores are 12-15 y.o. kids who are looking to buy the coolest (read: most colourful and chunky) looking MTB they can find.
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Postby 531db » Tue Mar 06, 2007 7:33 am

stryker84 wrote:

"Since the main bike-buying demographic for those 2 stores are 12-15 y.o. kids who are looking to buy the coolest (read: most colourful and chunky) looking MTB they can find."

Which explains their stocking of 26" (559mm ETRO) tyres and tubes but not 27" (630mm ETRO) which they stock instead of 700C (622mm ETRO).
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Postby Bnej » Tue Mar 06, 2007 7:42 am

KMart has just started selling 700c tubes with Presta valves where I live.

The way they run down their stock these days (stupid) all that was left for about 6 months was loads of 27" tubes. Handy if you had a 15 year old bike I guess. :roll:
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Postby mikesbytes » Tue Mar 06, 2007 8:02 am

Bnej wrote:KMart has just started selling 700c tubes with Presta valves where I live


I've spotted them too

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Postby 531db » Tue Mar 06, 2007 8:11 am

Are Kmart stocking 700C Tyres as yet then?

Or still 27"?

I don't live close to a Kmart, but the local(ish) Big W still carries only 27" tubes (Schraeder valve).
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Postby mikesbytes » Tue Mar 06, 2007 8:46 am

531db wrote:Are Kmart stocking 700C Tyres as yet then?

Or still 27"?

I don't live close to a Kmart, but the local(ish) Big W still carries only 27" tubes (Schraeder valve).


Didn't spot any

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Postby TriggerFish » Tue Mar 06, 2007 11:40 am

mikesbytes wrote:Mountain Equipment Co-op Cycling

They have presta 700 x 28-32 and 700 x 35/43c tubes



Useful info on that site re sizing etc. too. Thanks for the link!
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