K2, 2007 K2 Lithium 5.75 All Mountain Bikes >>> Mountain Bikes by K2 More details and ordering info. The peaks seem more enjoyable on a 2007 K2 Lithium 5.75. Many adventures lie ahead for you on the 2007 K2 Lithium 5.75; this mountainbike was made for thrills. The greatest way to enjoy the fresh air is on a mountain bike such as this; great scenery awaits you in the outdoors. The loveliness of the 2007 K2 Lithium 5.75 is stunning; bikes should be beautiful as well as fun. User input on 2007 K2 Lithium 5.75 by K2: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines