You have a 100 lb weight limit.

There are some differences between the Yakima fork mount bike carriers. The basic one is the Copperhead - low cost. Use this if you will always be able to keep an eye on your bike - not secure at all (easy to steal).

The Steelhead is next in price. Definitely more secure, but I find this one clunky to use.

I currently have the Viper - very secure. This works fine with road or mountain bikes.

The Sprocket Rocket is the newest model - quite fancy looking. One nice feature that makes it an upgrade to the Viper is the twist knob to tighten the head down onto the fork - quite comfy on the fingers.

Hope this helps.