The bars come in 2 diameters- 22.2mm for mtb brakes and shifters and 23.8 mm for road brakes. Mine are 23.8 and I bought some special brake levers that are for upright riding, like a mountain bike, but with clamps that were for road bike diameter bars. Confusing isn't it? if you have 23.8 bars, the MTB levers will not go on at all.
Have a great day,
Tom