Is it weird to put 24in. on a 26er?

not really too weird. I borrowed a friend's 24" wheeled singlespeed for a ride in Nelson BC once, it was fun. that bike was an Arrow DSS with a 2003 or 2004 Marzocchi Z1, it had some Arrow DH tires on it, it was pretty fun to ride.

one thing I wonder about your question is that if the fit seems wrong are you sure it's just the wheel size? what about the fit don't you like?

Big, how? Too tall is a very different feel than too long and would require different modifications. I had to run 24" wheels on my first DH bike because it was WAY too tall and I had no standover. I ended up selling it to buy a bike that (all around) fit me better.

with the 24" wheels you'll basically gain an inch of standover. the wheelbase will be the same, the layout of the cockpit (crank/seat/bars) will not change of course. If you build with similar components the wheels should be lighter, since there will be less material, but this may not solve your problem.

You might think about trading your bike for a smaller frame if you really want to keep your 26" wheels on.
If not then go for it, 24" will ride perfectly fine on any bike.

any updates to this?

Your gearing will be different.

You might be able to accelerate quicker is the theory,but i never noticed that running a 24" only on the back of several fr/dh bikes years ago.

Your bike will probably turn quicker through the tight stuff but will be less stable going real fast depending on your ability!

I always used one on the back to get a little bit more slack HA,but i DID notice the 24" rear wheel got "hung up" rolling over alot of rocks & obstacles. I went from a Santa Cruz BULLIT using a 24" rear ;to a 26" f&r Yeti DH9 & it was 2000% better.

I've always maintained that 24" should be the industry standard for wheel size in MTB. It's just a much more compact sized wheel, and much easier to control and manoeuvre.

I've been riding Bmx cruiser size on the streets for ages, and it's just the perfect size for stand-up riding. When you switch to a 26 and stand-up to pump, it just feels ridiculous; because your'e flipping an added 2 inches of diameter in a wheel, from side to side.

If you swap your 26 inch wheels to 24, the whole bike will lower by just 1 inch. And if you're building a new ride up from scratch, you might want to opt for the 'Small' sized frame in their lineup, as opposed to the Medium or Large.

24's are awesome...... no doubt about that.

Your BB will be significantly lower as well so you might find you hit the pedals a lot more (on rocks or whatever). Honestly that would be the only thing I don't like about making a 26" bike to 24", depending on how high the BB currently is though.

many many important information.really these threads are very helpful.thank you.

many many important information.really these threads are very helpful.thank you.

This is not helpful at all.
But my LBS had a Surly 1x1 with 24" wheels and 3.0" gazzi tires. It was pretty sick.