29'er vs 700c
 

I was wondering if they were the same size. I ride a cross bike equipped with discs and road rims with disc hubs kinda hard to find. Other suggestions also accepted.

Same rims, bigger tires on the "29'er" -- it's just marketing.

Rim diameter is the same.
29'er tires are so much fatter, they get close to 29" diameter.

Rim will be WIDER for a 29'er than a road bike.

There the same size (diameter), 700c wheels will normally be much narrower than 29er wheel as 700c is used to describe wheels on road bikes, with 23-28mm tires, where as 29ers will have 2.1-2.4 tires (gota love imperial and metric measurements being mixed up for bike terminology)

The biggest difference between a 700c and 29er wheel will be a 700c has a 130mm OLD hub & rim brakes, and has a 135mm / 142.5 OLD rear hub for discs, but expect both of these to change in the next few years, with road bikes getting disc brakes, and MTB's getting wider (bolt through) rears.

Would check the spacing on your frame, as if you currently have a disc specific frame, it probably has either a 132.5 or 135mm spacing.

29'er rims are designed to accommodate wider tires without having to worry about the tyre rolling off.

As a trade off, you might not be able to use narrower tyres.

http://www.schwalbetires.com/tech_in...dimensions#rim
note that rim width is measured from the inside.
If you measure from the outside, subtract 5.5mm, which gives an approximate result.

the hub width is likely a 135, on the frame since there are lots of disc cassette hubs .
the companies go with the best price parts pick.

so 622 rims, 135/100 hubs you're good to go..

cross /dual sport tires are about 35 wide

Road bikes are narrow tires.. 23 common.. then the rim is narrower.

29'er

Just 700c with a new marketing label...that's all.

=8-)

Thank you guys I was curious.