So i am buying these rims [https://www.lamacycles.com/en/octane-one/rims/2013-octane-1-solar-31-rims?sessionkey=LU8JO2lF17NT2Pg] 26'' 36h and im wondering if these tires will fit it [http://www.lamacycles.com/en/morewood-bikes/khe-mac2-steel-tire] they say 20''x 2.3 but do they really mean its for 20'' rims im new to building bikes so thats probably why i sound like an idiot