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TRAVEL Hints and Tips Post your TIPS to travellers - all the interesting little tidbits you learned on the road about packing, where to get stuff, and how to cope with problems. Please make sure the subject describes the tip clearly!
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  #1  
Old 24 Mar 2007
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tubes right size

Hi guys

I'm leaving in 8 weeks to a 30 days trip and can't find the right size of tubes for my bike 95 bmw K75 to carry in case of a flat .
Bike's tires size are:
100-90-18 front
130-90-17 rear
Can I use another size?
If anyone could give some help on that I would appreciate.
Thanks!
M5
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  #2  
Old 24 Mar 2007
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You can use anything with numbers close to yours as long as the last digit, rim size is the same.
you'l see the 140/80/18 is the same as the 110/90/18 tube, actually the tube box has all the numbers on it as use from: 100/80/18 up to 140/90/18.
Good luck!
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  #3  
Old 28 Mar 2007
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Thanks

Steven,
Thanks for your help.
I'll do that.
M5
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  #4  
Old 28 Mar 2007
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you can also generally use a larger rim size front tube in a rear tyre in an emergency. Enduro riders will often only carry a 21 inch front, that can also be used in an 18 inch rear in the event of a puncture.

cheers
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  #5  
Old 28 Mar 2007
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n but remember they are the stock size for

Last edited by mollydog; 26 Mar 2009 at 02:59.
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  #6  
Old 29 Mar 2007
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correct size tubes

Putting a 21inch tube in an 18 inch wheel may get you mobile but do not leave it in there for longer than you need to get back home or a tire store. The circumference of the 21 is too big and will usually cause the tube to crease which then wears a hole in the fold and you have another flat. Experienced this scenario once from a bike which I did not know had a larger diameter tube than the wheel rating. If any choice needs to be made I would favour a smaller diameter , at least it can stretch and fill the tire without creasing. Then get the correct size.
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  #7  
Old 1 Apr 2007
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Found'em

Thanks for all of your postings.
I finally found the right tubes.The brand is Cheng Shin. I don't know about their quality but was the only place that I could find the specific sizes 100-90-18 F and 130-90-17 R heavy duty.
Thank you all.
M5
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