On the ride we are going to be doing 450 each week. So I would say 100km/wk isn't enough.
I'm not a racing cyclist. I attended the briefing before christmas at the Claremont pools. The training expert said that we should be aiming to do the following, peaking this week and/or next.
1 x1hr, 2 x 2hr, a 2-3 hr and a 3-5 hr at the weekend, Monday off.
The peak weeks, ie, this week or next, cycle everyday. I reckon you ought to target about 150-170 in the next two weeks. The last week should be fairly restful, short rides everyday
The people I have spoken too say two things are important in your preparation, which matches the expert. Build up to having a full week of riding every day for a reasonabe time. Second have at least one long ride. The latter prepares you in a number of mental and practical ways, how to last several hours in the saddle, water to take, nibbles, sore bum, etc, so it gives you and your bike a good test. You may find that your bike might need some adjustments that don't show up in short rides.
6.30am every Sunday a group of Lime green and other bikes cycle around Kings Park, if you are late you are bound to see us doing circuits so just flag us down and join in. Meet in the car park junction of Mounts Bay and Hackett Dr. Its a lovely situation, a few hills and flats with a nice group of people many of whom will also be attending the pre ride dinner on wed 15th. Cycling in a group really feels so much more fun.
I think you may find some of us would like to join you for a ride in the Hills, if you can show us around.