Old Rahleigh Estelle

GTR35 Posts: 40
edited June 2009 in Workshop
We have a Rahleigh Estelle which hasnt been used for a long time, so we thought we'd replace the tires and inner tubes. The tires which were originally on said 26 by 1.25. But every tires were bought seems to be just a little too small. This is my mums bike which as ive said is pretty old, so i know nothing about it. I think that the wheels are slightly bigger than the usual 26 rims as my mtb tires don't fit either despite my bike having 26 rims.
Any help would be appreciated.