Reddit reviews Shimano 11-Speed 1.85mm Low Spacer

Most 11 speed wheels will accept a 10 speed cassette. There is a little spacer you can get that takes the place of the 11th gear. A local bike shop will probably have extras they can give you for free or super cheap.

Edit: They are $2 on amazon.

https://www.amazon.com/gp/product/B00BO4X1SE/ref=ox_sc_act_title_1?smid=A2TE9IQP68MWQU&psc=1

Thanks for the kind words all.

In case anyone wants to use the wheels with a 8/9/10 speed Shimano drivetrain, you would only need one of these $7 spacers: https://www.amazon.com/Shimano-11-Speed-1-85mm-Low-Spacer/dp/B00BO4X1SE

I didn't think it was that easy. I searched for an identical item on Amazon and found this. A few reviews were doing exactly what I was doing. Shimano 11-Speed 1.85mm Low Spacer https://www.amazon.com/dp/B00BO4X1SE/ref=cm_sw_r_cp_api_i_-AQ5CbW3F3G4N