The 29 full suspension would be good for RR tracks. I hate mine for very tight twisty single tracks though. I have a bad crash every time I ride it on this stuff. No problem here with my 26 inch wheeled bikes, in fact I have no problem on the machine cut or rough straight single tracks with the 29. Our club has 40 miles of hand cut single tracks and I have problems here with the 29. I clip my handle bars a few times with each 15 mile ride. In a place with a steep up hill with a 90 degree tight turn the length of the bicycle at the top with an immediate steep drop off I can't get the bike absolutely straight and lined up with the trail and end out out clipping a tree and flying into a gully. Our trail is just a little wider than my bars in at this and a lot of other places and you need to be able to get the bike straight right away, which is harder with 29 inch wheels. Happens like that in different spots with each ride. I feel like throwing it away and keep going back to my 26 inch bikes. The 29 has wide handle bars to help steer the clown wheels and they are too wide to fit between trees on several places on these trails. In a lot of places they just fit. I have to stop, stay on the bike and grab onto a tree and wiggle the bike between the trees. I am reluctant to cut the bars down as everyone tells me that it makes the big 29 inch wheels too hard to turn. Taller riders here can handle them on these trails but I am short, old and have poor balance so the 26 is better for me. I cut 3 inches off my 26 inch bars and could cut another 2 inches off them and have the perfect 26 inch setup. I think the 29 would be good in more open areas out west. I would really like to get rid of it but no one wants a year old bike, it's not new so I am stuck with it. I can even ride my rigid klunkers better on these trails. We have a 47 mile Rails to Trails bike path here and there is a section that goes down over a bridge up and down again. Running beside it is an elevated but level active RR grade. I ride on it to avoid the up and down and I don't think the RR grade is too bad on my 29.