Bicycle Mechanics - axle width in rear dropout issue

Hi, looking for some help here.
I have an awesome pepto bismol colored 90s Bianchi.
I am building it and it seems like the rear droupout doesn't want to accept the axle.
I have read that I could file down the dropout or the axle. I don't really want to file the dropout as it is chrome and that seems wrong. I will consider filing down the axle, but what is up with this? I've never ran into this problem and I am hesitant to start filing the axle (concerned about doing it evenly).. help!

Hardware:
Bianchi with gippieme chrome rear dropouts
reynolds alta comp with shimano 9 spd cassette on it

Yeah, a mid 90's Bianchi will probably not have been spaced for a 9 spd rear wheel. I'm assuming steel, which means you can spread the rear triangle. See Sheldon Brown:

http://www.sheldonbrown.com/frame-spacing.html

Is the dropout spacing too narrow for the width of the hub or is the slot in one or both dropouts too narrow to accept the axle ends?

Don't file either!!! You can spread the rear-triangle outwards. Shimano makes some axle lock-nuts that have a beveled outer edge which helps to spread out the rear-triangle as you push the wheel on.

If it's the slot in the drop-outs that's too narrow to accept a 10mm axle, then you can use a big screwdriver slid down the slot (parallel to plane of dropout) and pry apart the slot slightly.

It seems to me that if the dropouts exist, then the correct size axle exists. I think that deforming the frame in any way is a last resort, even if it is just increasing or decreasing the fork end spacing. I suggest looking into getting some hubs with axles to fit and rebuilding your wheels.

Do People even read the OP?

If he is considering Filing Anything then obviously the issue is the Axle is to thick to fit into the Drop-Out Slot.

If you file off just the threads on the axle so it fits then I doin't think that will reduce the Axle strength much as the threaed area isn't goign to offer that much strength.

Do People even read the OP?

If he is considering Filing Anything then obviously the issue is the Axle is to thick to fit into the Drop-Out Slot.

If you file off just the threads on the axle so it fits then I doin't think that will reduce the Axle strength much as the threaed area isn't goign to offer that much strength.

If your not planning on using that wheel on another bike in the future, this could be your best solution!!

I think I would get a professional opinion before I start removing metal from anything.

HI do u have a ruler in mms or something to measure the space between the dropouts? probably is 127 mms or 12.7 cms. The 9 sp wheel u have in there it should have 130 mms or 13 cms between the cones.

Reading still cant understand if the problem is because the dropouts slots are too narrow for the axle or the dropouts space between them is too narrow (127 mms vs 130 mms) Either way a 130 mms wheel in a steel bike fits fine. U can force a little bit those 3 mms, nothing should happen. IF the problem is in the dropout slots well.. it means the dropouts are damaged and get them back to position will be a little bit trickier, u can crank those few mms using a pipe so the dropout slot get to its real position. It is hard to do but doable, as long as u do it little by little u'll be fine.

thanks

thanks.