I have Ichiba 10mm hubcentric spacers installed for the front wheels, and it included extended studs which I installed also. I'm thinking about changing it out with a 15mm spacer instead. Can I just swap the 10mm spacer out, and replace it with a 15mm spacer w/o changing the studs again? I'm assuming the 15mm extended studs are longer than the 10mm studs, though I didn't measure before I installed them.

 

Yes, the 10 and 15mm spacers come with the same studs.