[Edited: the original post had 16mm, it should be 15mm...]

Hello,

Our family bicycles recreationally. We have an old mountain bike, an old cruiser for my wife, and two kids' bikes. To be able to take off a wheel, pedals, or to adjust handlebars or seats on either of the four, I need five wrenches -- 13mm, 14mm, 15mm, 1/2 inch, and 9/16 inch and a 6 mm Allen key.

Is there an alternative tool I can take when we go riding or am I stuck carrying a stack of wrenches with me?

-Dmitri.

P.S. I searched on-line for bike tools, but none of the multi-tools seem to have the right combo -- and none(?) have 15mm or 9/16 inch in them. I guess this is because these tools are geared towards more modern, or "professional," bikes?