UPS expedited/express brokerage fee is built in, so when you see ground shipping for $15 and express for $40, you go with express because you're going to get hit with a $50 brokerage fee (that's just the brokerage, plus duty, plus tax), so the extra cost to get express is worth it
fedex also have a more reasonable brokerage fee, although it's still higher than USPS/Canada Post
bike frames, bike wheels and complete bikes (worth over $1000) are not duty free, i believe bike frames and wheels are around 3-5%, and complete bikes are 10-13%, so if you imported a complete bike you would be paying tax (PST+GST) and duty, gets crazy.