Hey folks, I'm ramping up for the Death Valley Century on 11/2. This will unfortunately be my only full century this season () although I've done a couple metric centuries this spring/summer. I bike-commute a lot and will be ramping up more, to 100-120 miles a week (or more) for the next few weeks. I've done centuries in the past and have a good feel for the training situation overall.
My question is this: can I substitute mountain bike time for road bike training time? Is time in the saddle the determing factor in training or is it really miles?
I'd hate to have to back off my MTBing fun because it's such a welcome change considering that bike-commuting and road biking are so similar. And the weekend is the only time I can MTB, and to do a long ride on my roadie, while definitely a blast, will force me to forego my time with my MTB buds.
Thoughts? Thanks all.