That is one thing i noticed going frome the base bumper to the extreme, is the amount of ice that collectedIt did have the Polaris extreme front bumper on which didnt help. I replaced it after that with a bmfab which held a lot less snow/ice
I had my 17 Mtn Cat and my buddy's 15 XM on the trailer in the garage after a deep day. I started knocking off ice and snow and taking it out in shovel fulls, easy 5 lbs a piece. I managed to get one shovel off the Cat, over a dozen to get the snow and ice off the Doo. The full skid plate on those is a huge holder of snow, the rear cooler build up the other. There was an easy 50-60 lbs of snow and ice on that machine.
Some definately hold more wieght than others and I can see an easy 30-50 lbs hanging off most sleds. The Cats less than others and the Alpha is just awesome at shedding snow.