Hi,

I could do with a longer axle (spindle) on my rear hub. It's a Campag hub, from the early '80s. I don't know the model, but it wasn't one of their highest priced ones that's for sure. Looking on Velobase they could well be "Nuovo Tipo".

Are the threads standardised, so that I can get any old spindle of the correct length, and keep the Campag cones and locknuts? Or do I need a special "Campag compatible" one?

Thanks in advance, Tony S

Yes you can I just did this to a 120mm super record hub. Gutted a NIB Tipo rear axle that was 126mm
and swapped it with the SR to make it 126. It was easy! Everything is the same.....

Cheers. You replaced Campag with a different model Campag. Do you think it would be compatible with other make axles?

Yes, there are certain axles that may be threaded different, or even be a different size, than your campy's.

Sorry didnt catch that you were using a different axle maker.
You might check thread pitch and size and search around for one
They cant be too different as the axles need to fit in the dropout slot.

Take it to a shop, there's a few sizes and they'll figure it out for you. They'll have a little board with all the different threading types and they'll even sell you an axle without the hub around it. Also, bring in your bike if you don't know the spacing and the length you need. I think you want 7.5mm per side so 141mm? Don't quote that.

Actually, Sheldon Brown suggested that it was fine to use an axle meant for 120 mm spacing when going to 126. All you need is enough axle projecting on each side to key the wheel into the dropout for installation. Once you tighten the QRs, the friction will hold it in place if it's properly tight.

So try just adding a pair of 3mm spacers to the axle stack, and see what you have "showing."

And if you want to buy another axle, Sutherland's says that all Campy hollow axles are 10 mm x 26 tpi (though for all I know, ISO standard 10 mm x 1mm pitch might work fine); for 126 spacing get one 10 mm longer: 136 mm. Be sure it has the keyways (grooves in the threads) for the keyed washers. It's not a big deal to buy an axle longer than you need and cut it down, provided you have a Dremel.

Campi, Miche, JoyTech and probably a few others use 10mm x 26 threads per inch for rear axles. I'm pretty sure the root angle is 55 degrees too. Wheels Manufacturing makes a wide variety of 26tpi axles.

Everyone else uses 10mm dia. x 1mm pitch w/60 degree root angle.

Campi dropouts and rear derailleur fixing bolts are also 26tpi but there are so few threads involved, and dropouts are so soft (compared to cones) that you can mix and match.