sounds like you may have got Excel spokes by mistake, they are bigger diameter and only for Excel rims which OTR sell, it might be worth a call to Excel here in the States, it might be cheaper to get a rim rather than go backwards and forwards to Germany...and quicker

RK Excel Phone: 760-732-3161
Fax: 760-732-3186
E-mail: info@rkexcelamerica.com

Mailing Address:

RK EXCEL America Inc.
2645 Vista Pacific Drive
Oceanside, CA 92056
USA