Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: is this rack work on Men Trek Navigator 2.0 - 21" ( 53.5CM) bike?
Document: Ordered online and when the box came in I was afraid I got an empty box, that is how light this thing is. As usual, the instructions were just about useless. The only usefull thing on the instruction sheet was the drawing. Smart design allows this unit to be mounted to just about any bicycle. I got it working fine on my trek navigator 2.0. I could not get it to work on my trek navigator 1.0 though.
Anyway, it is very sturdy when put together properly, and the fit is very good on my old mountain bike. I have an early 1990's Trek Mountain bike. Its weight rating is stamped on the rack at 25kg, which is 55 lbs. Nice sturdy cargo rack, the spring clip is sturdy also.
I bike everyday to work, and I use this rack to bring my pannier. Inside the pannier, I carry my laptop, meal, etc. It is very sturdy and it helps me have a healthy back because I don't have to carry a heavy backpack everyday.
No clanks, no bangs, no grinding or rubbing while I'm riding.I purchased this rack to work withBushwhacker Omaha - Bicycle Grocery Rack Bike Pannier Bagand its a great combination for my use turning my cruiser into a grocery getter for the neighborhood.
There were some tricks I had to invent to get this to fit. I have an older (apparantly) bike without the frame mounts that allow the 2 stabilizer arms to simply screw into the bike. I had to make a clamp that allowed the arms to secure. Following that I was able to easily screw the axle mounts down. Since then I've added homemade panniers and the rack supports them well. I'd recommend this rack.Mighty Full Alloy Pannier Rack
This rack is no light weight....it's built very rugged and will handle bags or baskets quite well. I mounted two Wald folding baskets on it, and the rack provides a very firm support for them. Installation instructions were not very thorough, but if you have enough savvy to work on your bike at all, you'll be able to sort your way through these details without any trouble.
I don't know why people are complaining about instructions. It does not get much easier than this to install on a bike and my bike did not have the tapped holes for mounting. I purchased the mono stay adapter to make this work for my bike. I did not even look at the instructions. Pannier appears to be well made and sturdy. I have not yet put any real weight on the rack but it appears that it will easily handle 50+.
Light weight but the extra bars give excellent stability and strength.A lot of rear racks will lean to one side if there's only weight on one side and that is bad.This rack -- I generally will load a large pannier on one side and fill it with 20 pounds of groceries, and the rack is rigid enough to handle it just fine.Installation options are good and flexible. (though we did need our bike shop to help attach it). It should work on almost all bikes.
I have seen other racks for pannier bags, but this rack is by far the best. The mounting hardware is adaptable for many different applications and with 2 cable clamps I was able to position it exactly where it needed to be.
It is a nice rack but it is a little hard to get it fitted just right. We had to go to the bike shop to get screws to attach it to the bike at the wheel hub because the ones provided were only for the assembly of the rack.
Answer: yes