Most of these forks lock. But if you do that, you're carrying the weight for nothing. Again, there really is no energy loss with them - the weight and different geometry (hybrid) are the main things. I didn't research any of those bikes. i feel if the OP doesn't want to go to the trouble of adequately describing them, then I'm not doing any googling. However, the post is in Hybrid Bikes so why wouldn't he be talking about hybrids?