New wheels and bike now pulling right

[nard dog]

Hey all, Im quite new to the bike tinkering thing so apologies if this is a stupid or thrashed out question.

I recently bought a set of "Campangolo Scirocco" wheels to replace the stock ones that came with my Giant Defy. I installed a new cassette and threw them on and all seemed well. However i noticed that when I take my hands off the bars the bike pulls to the right.

I threw the old wheels back on and it rides straight and then tried the new front wheel with the old back wheel and it was fine. The back wheel looks fine to the eye when its spinning.

Is there likely an issue with the back wheel or is this normal for this type of wheel or have i possibly just done something stupid when installing the wheel or cassette?

Cheers

[Duck!]

Check the little conical springs on your quick release skewers. The narrow end point inward & butt up against the axle ends, while the wide end seats against the skewer head & nut. If they're around the wrong way & sitting over the end of the axle, they'll prevent the wheel seating in the dropout properly & throw the alignment out.

[nard dog]

Thanks for the heads up I double checked the springs and they seem to be on the correct way.

[silentbutdeadly]

Tight bearing? The budget end of the Campagnolo/Fulcrum wheel family is notorious for having sub-par wheel bearings straight out of the box...

[Derny Driver]

Is the rear wheel centred correctly? Take the wheel out and put it back in. Pull it backwards and check with your eyes that the gap at the front is even between the chainstays on each side. Clamp it and then check how it sits between the brake blocks.
Some wheels just don't like to sit nicely in the frame and are not as self-centring as they should be. Centre it manually checking all the gaps are equal between the tyre and frame.