Stupid question alert sorry

sorry I know I am new and know how annoying a question like this can be, but there are two sizes of risers one is 26 and one is 31.8 or something like that soo...... does anyone know which size I would need for my Bowery? I have heard u can use the smaller and then do the coke can trick is this possible as I can only get polished in 26.

sorry for the dumb question

nick

3 sizes.

25.4mm - 26mm - 31.8mm (oversize)

the coke can/beer can shim trick would be fine going from 25.4 to 26 - but if you are going to shim a 26 out to 31.8 you might be better off just buying a proper shim (chain-reaction is a good source).

You could also just get a new 26mm stem to use with the polished bars.