![](/files/attach/images/298448/191/327/001/sp29er.jpg)
![](/files/attach/images/298448/191/327/001/fishersugar29er.jpg)
What is a 29er?
Good question. At the most basic level, a ?29er? refers to a mountain bike with a larger rim than a ?traditional or regular? mountain bike.
The ?29? is actually a bit of a misnomer, as it refers to the approximate diameter of the entire wheel (with a tire mounted), whereas a regular mtb is approximately 26? in diameter.
To be more specific about rim size, the 29er uses rims of the exact diameter of a ?regular?
road bike rim also referred to as ?700c.?
![](http://www.wildbike.co.kr/cgi-bin/data/cyclocross/spot29er.jpg)
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