is it easy to fit wheel spacers on an r26, is it just a case of taking the wheel off and putting the spacers on?
Answered your own question there dude, as long as you have the correct length bolts (depending on how big you’re going) yes it is.
Just make sure the bolts are reaching the back of the threads and also that they are not protruding out the back and rubbing on the hub! Can take a photo for you to explain if you need help or are not sure! Also make sure you go for the "hub concentric" type if you dont have them yet!