Unless your Trek 900 has rear disks or the chainstay/seatstay assembly is significantly oversized anything sold as a chainstay mounted kickstand should work. One came standard on our Kent and it works very well. Our Raleigh came without a stand and I have learned a lot about kickstands while shopping for one. The first thing I found out was the considerable antipathy towards them by a significant percentage of all classes of bicycle users. Now I have never had someone step on/into the rear wheel of my pride and joy as it reclines on the grass following an event but I have seen hundreds of such accidents waiting to happen. Where would motorcycles be without kick/center stands? Seems that those of us who opt for the increased practicality of mounting one ought not be derided so harshly. My beef with chainstay mounted stands is they usually have an extra piece that goes up to the seatstay complicating the mounting and adding weight. There is only one design I found that has a single mount designed for large diameter (think aluminum) chainstays but I have never been able to find it. It shows up on all the online catalogs but when one tries to order it comes up as unavailable. I am holding out for this kickstand. The Esge is nice but it is horribly heavy IMO and I do not think the mounting bolt would be long enough to clear the extra deep well made by extra thick chainstays. I am sure a longer bolt is available from a local hardware store but I'm just not feeling like putting a motorcycle style centerstand on something as tall as a tandem bicycle. A nice fellow at Raleigh USA advised me that if I did fit the Esge or any other kind of clamp-on kickstand it would instantly void the lifetime frame warranty. So anyone reading is reminded to remove theirs before taking their bikes in for service. The clickstand looks like a nice idea and I intend to look it over but as I have just been introduced to the concept this minute I can't comment one way or another.

H