Bottom Bracket Query

This may be a ridiculous question but it has been bothering me. Please excuse my ignorance :)

Currently installed on my bike is an old style shimano BB, similar to picture below:

The issue is my BB looks like this:

My BB seems to have some kind of threaded bolt through it. This obviously means that i cant fit my crankset on with its standard crank bolts. Does any know why this bolt is there, if it is normal and if i can remove it so that i can fit my cranks the standard way?

Thanks for the help!

it's just an older type, I had one and got nuts for it off ebay for about £1.50 and used my exisiting cranks. You might want to use a washer as well to make sure they are on properly though

i used these ones

http://www.ebay.co.uk/itm/Cycle-Crank-Nuts-Bike-Bottom-Bracket-Axle-Crank-Nuts-/230566786105?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item35aed9f439

[QUOTE=freddiepole;2546570]This may be a ridiculous question but it has been bothering me. Please excuse my ignorance :)

My BB seems to have some kind of threaded bolt through it. This obviously means that i cant fit my crankset on with its standard crank bolts. Does any know why this bolt is there, if it is normal and if i can remove it so that i can fit my cranks the standard way?

The threaded part you can see is all one piece through the bottom bracket.

got it :)
thank you

If you ever need to remove your cranks, take care to buy a crank extractor that can open up enough to accommodate the threaded bolt bit of your axle. Not all do.

If you ever need to remove your cranks, take care to buy a crank extractor that can open up enough to accommodate the threaded bolt bit of your axle. Not all do.

I know this from experience, I now have two crank extractors!!!!