Sold wrong inner tube ?

Questions about purchasing bicycles and parts

Sold wrong inner tube ?

Postby deagles » Fri May 23, 2008 6:50 pm

I'm back on 2 wheels for the first time in about 20 years - and a few things appear to have changed - so I need some help please !!

I've got a flat on my hybrid. The tyre size printed is 700x35 - and I have been sold a tube that has a box marked as "700x18/23 40" (price tag says 700x19C 40mm).

Gut feel is it's too small. Can some please confirm if I've been sold the wrong size tube ?
Posts: 2
Joined: Fri May 23, 2008 6:42 pm

by BNA » Fri May 23, 2008 7:07 pm


Postby MountGower » Fri May 23, 2008 7:07 pm

G'day deagles

You can go a little too small but I wouldn't go that far. If it said 28/32, I'd use it, but I think that is definately too small. I can't see you having a problem exchanging it, regardless of who's error it is.

Postby vitualis » Fri May 23, 2008 9:54 pm

Yes, the tube is too small.

700x18/23 40 I would assume mean a tube that will fit a tyre that is 700C 18-23 mm width with a 40 mm length valve. The price tag: 700Cx19C 40 mm basically states the same thing (but saying that it will fit a 700C 19mm width tyre... which is within the range).

Michael Tam
Photos: Michael's bicycle obsession
2009 Pegoretti Responsorium Ciavete Custom :: 1982/3 Colnago Super :: 2006 Cannondale Six13 Pro :: Late 1980s Repco Superlite
User avatar
Posts: 949
Joined: Mon Apr 09, 2007 12:15 am
Location: Sydney, Australia

Postby deagles » Sat May 24, 2008 3:07 pm

Thanks to both of you for confirming my suspicions and thanks to vitualis for deciphering the last part of the numbers. I returned it today for the correct size.
Posts: 2
Joined: Fri May 23, 2008 6:42 pm

Postby alchemist » Sat May 24, 2008 4:20 pm

700x19 is small, but will work fine. I end up using these in my 'cross bike running 35mm tyres most of the time as it saves me having to remember to have spares of different size of tubes. I do find them a little more prone to pinch flats, but no difference in punctures.
Posts: 819
Joined: Thu May 17, 2007 6:59 pm

Return to Buying a bike / parts

Who is online

Users browsing this forum: MSNbot Media

Support BNA
Click for online shops
Torpedo 7 Torpedo7 AU
Ground Effect Ground Effect NZ
Chain Reaction Cycles CRC UK
Wiggle Wiggle UK
Cycling Express Cycling Express
Ebay Ebay AU
ProBikeKit ProBikeKit UK
Evans Cycles Evans Cycles UK
JensonUSA Jenson USA
JensonUSA Competitive Cyclist