Inner Tube sizes

LostInTheWoods

For me, the size of my inner tubes have never been an issue before. "Yeah, I'll take a couple of those Schrader tubes for big noobly tyres please...". But I now want a set of road wheels, and the set I bought (Shimano WH-M505) are so narrow, they must have a Presta valve inner tube.

So... I got myself some 26" Schwalbe Presta tubes (SV12), and on first inspection, their diameter is a lot larger than the diameter of my wheels! So after going through a mild panic that I bought a set of 24" wheels (I didn't), I am still left with the problem that the tubes, after even only a slight inflation, seem much bigger than the wheels. :?

I tried fitting a set of 1.3" slicks, and because of the extra slack, the inner tube has a Z shaped kink in it, at this point I decided to post this, as the picture just doesn't look right.

Now I know that Shimano recommend that the minimum tyre size for these wheels is 1.5", so is this the problem?

Does anybody have any thoughts. Should I just pump these babies up? Or invest in some larger slicks? :?:

Thanks,
Stephen (who has used slicks before, but never had all this hassle)

nicklouse

so what is the size on the tube? (not the box).

LostInTheWoods

The only thing on the tube itself is what my be a lot/serial number - 2710724 and the following: (No.12), which corresponds to the number on the box. :?