Yes, I know, another flipping 29er thread. Surely we've done this to death by now. Unfortunately I can't find the answer to this specific question though, which relates to sped up long draggy fire road climbs.
Following a four day test on an Orange Gyro I've been getting back on my 26" Trance and going back over some of the same trails for comparison. I wont bore you with all the details. Suffice to say that there are advantages and disadvantages to both. Neither are better, it's just a case of picking the best set of trade-offs for you. But the one thing that is bothering me is the extra speed of the Gyro climbing simple fire road climbs. We're not talking technical climbs (where traction would be a key) or even excessively steep ones (where the size of the bottom gear might come into play), but boring fire road slogs.
How can a bike that is 2lb heaver (with virtually all of that extra weight being in the wheels) be faster up a relatively smooth climb? It doesn't make sense and I'm tempted to dismiss it as just being a case of me pushing a bit harder. But I wanted to check that there wasn't actually some known technical reason that I'm overlooking.