last fall I stuck my base model tricross up n the trainer and as the weather has gotten warmer I have been riding my all-hi-ten Trek 820 with Fat-boady seat, racks, bags and basket around the hood some. Mostly towing a child in a trailer or trailer-bike (also thick steel). Tonight I dismounted the tricross and swung a leg over it. I applied "normal" pressure on the leading peddle and WOOOOSSSHHHH!! Wow. So much different. I can only imagine if it has been a full-on road bike!!!!