John Everett said:ride the Katy Trail
riding a touring bike with 28mm tires?
John, I've been recommending that anything 25mm or wider is acceptible
for the Katy Trail, and no one has yet told me that they disagreed
(though I'd love to hear any feedback). Here's the full text from
http://www.bikekatytrail.com/faq.asp#tires
-----
What's the best kind of bike tire for the trail?
In general, wider tires are better. If you're riding a mountain bike,
hybrid, or comfort bike, your tires are fine. But the Katy is
definitely suitable for road bikes, and I see plenty of them out
there. The crushed limestone packs down hard and gives you a surface
nearly as solid as asphalt, unless it's been raining a lot. But there
are a few places where it's not packed as hard, or where the trail
crosses gravel roads, that could be a little rough on road bikes.
Most of what I've heard from road bikers is that any tire 25mm or
wider is fine for the Katy Trail. I've seen some riders say they did
fine with 23, but most suggest 25 or wider. For best results, go with
the widest cross-tread tire your rims can handle.
----
There's also a link to this discussion of tires on the Katy Trail:
http://www.bikeforums.net/archive/index.php/t-47455
Have a great ride!
Ray Scott
Explore the Katy Trail at www.BikeKatyTrail.com