HED H3 Spacer

Does anyone know if and/or what size spacer an H3 10 sp Shimano needs?

I have a spacer in mine just so there’s no (or very little) rear deraileur adjustment when I switch to my trainer wheel. However, it ran just fine with no spacer before I decided to get all my wheels matched up to avoid having to adjust. I’m assuming your H3 is 10 sp compatible and not a very old model.

Right…I guess I need to try it and see. I’m just going to ride them all the time and switch back for the trainer.

Thanks.

I have a spacer in mine just so there’s no (or very little) rear deraileur adjustment when I switch to my trainer wheel. However, it ran just fine with no spacer before I decided to get all my wheels matched up to avoid having to adjust. I’m assuming your H3 is 10 sp compatible and not a very old model.