yazz

Looking at a new Gunner Sport and wondering if mechanical disc brakes would be a better choice. (LBS has Tektro 521AG long reach brake calipers speced). What are pros and cons of discs. Because I do ride alot of the "Rails to Trails" with the limestone gravel I do get alot of dirt onto the rims and the brakes tend to grind it into the rims. Also assume discs would work better in wet weather. Do discs add significant rotational weight. Is that why they are not used on road bikes?
Mostly shimano 105 or Ultegra components on the rest of the bike any other thoughts on specing, only going to get one chance to do this correct the first time.
Point me in the correct direction!!!!!!