No, you can place the pads at different levels around about 20mm 5/8" slot to match up with the variance in wheel position that you always get with single speed horizontal dropouts bikes. Reach is arm length. Pivot to cable. Affects the tyre/ fender clearance and leverage. Been seeing v brakes on 3" tyre bikes in recent forum posts. 85mm reach minus about 25mm for the rim/ pad position would not adequately clear a 60mm tyre. It might clear a fender 59mm above the rim edge but the more the arms stick outward after you set the pads, the less tyre/fender height they can clear.. Still have to have room for the noodle holder. If you want to know how to set them up the good way not the big store way I will post in bicycle maintenance section.
Chrome plated steel (cruiser?) or nickel plated alloy bmx rims would prefer you use softer compound for effectiveness, transparent pads to keep the shine. My ears would prefer you just use alloy rims, lol. They all (pad types on chrome/nickel squeal horribly and I just hate that. Chrome rims are not not not a good surface for a rim brake in wet/dew. Tangential cuts to the pad surface might help but not enough IMO. The chrome will wear and flake eventually.. Doubt that they would outlast alloy due to that.. If you buy alloy rims without a machined brake surface then you can still use v brakes on a lot of anodized rims, depending on construction; but you shouldn't use them on powder coated unless you can sand the pc off first with wet n dry jammed over the pads.
The braking surface should/usually have a wear line or dots on it so you know when to replace it.