Yes mate, the Roller classics fit no problem. Not sure about the roller plus but i assume they do. The attachment hooks are on rails on the pannier so are adjustable.

In a word YES.I run Ortlieb back rollers.They sit lower and a little more to the rear.Run front rollers as well on a SWING, great balance and no heel clipping.

Hi,

Yes they are indeed compatible.

Neil

I had no problem fitting the Orlieb Back Roller Plus.The rack allows you to mount the bag lower than conventional racks for lower centre of gravity.

Hi,

The quick answer is most standard fitting panniers will fit. My personal preference is Ortlieb, although Carradice would also fit.

Do you have a specific pannier in mind?

Neil

A 29" MTB wheel is the same size as a 700c (aka 28") road wheel, which is the standard size.

So to answer your question, yes this should fit fine on most 29" wheel mountain bikes as the rack has plenty of clearance over the wheel, even with a mudguard - Just fitted one of these onto my Orbea AOS 700c urban bike with fat 35mm tires the other day so I know this from direct experience.

Be aware though you may have fitting issues if you have disc brakes or no mounting points.

See here for more info about wheel sizes and the confusion regarding the term 29" wheel.
http://en.wikipedia.org/wiki/29er_(bicycle)

Depends on how high up the mount points are.

Top platform is 120mm wide

Yes - that's where I carry them and it is really good because the rack has a couple of struts to lock the bags in place fore and aft.

For most bikes. However I had issues with mounting it to my aluminium city bike as my rear seat stays were quite large and got in the way of the rack when it attaches to the rear axle.

I now have to find a way of attaching it, which means I will have to source some longer mounting bolt and spacers to widen the rack to get around the stay tubes. I wish this rack came with longer bolts such as 20-22mm, as well as wider spacers to fit it. Annoying having to source my own.

Yes the older rack had a narrower and shorter top platform. This one is wider and longer, providing much better stability for your trunk bag or your tent/sleeping pad. There is also an extra welded cross bar on the middle horizontal bars that keeps the back clasp of your pannier from sliding backwards. Definitely good improvements.