Last year I purchased a 2011 Cannondale Quick CX 1 to start riding on my quest to hit 500 miles for the year. I was able to do that fairly easily on the bike, it is a great machine.

As I am getting more into riding though I wanted to do longer distance road riding, and continue to use the Quick CX 1, but on a different basis than I did in 2011. I intended to take that bike, with the OEM wheels, and put a set of mountain bike tires on it and use it as a semi mountain bike trail bike.

My awesome brother sent me a set of 29x2.1” mountain bike tires, and I picked up some tubes at REI a few weeks ago. This evening I tried to put the tires on the rim, the first thing I ran into was thinking that there was no way the tire would mount to the rim, it looked huge with the likely hood of it fitting being very small.

Well I was wrong about that, the tire and tube went together well and everything fit on the rim nicely. That is when it went downhill though. I put the wheel on the bike and immediately noticed it wouldn’t rotate, I figured I had the quick release off and the disc brake was rubbing. Upon further inspection though, after resetting the quick release I noticed that the tire was actually rubbing on the top of the fork. Here’s a picture of the original tire and fork, taken after removing the MTB tire and tube.

So I guess the answer to the question, if the question is “Will a 29x2.1” tire fit on a 2011 Cannondale Quick CX 1?” is NO. Unfortunately it will not.

I’m still going to try to find something that will work on the bike though, I would like to use it off road more, though I don’t think I’m ready to invest in a full on mountain bike anytime soon as I still see putting in a lot more road miles this year.