GT, 2006 GT ZuM 4.0 All Mountain Bikes >>> Mountain Bikes by GT More details and ordering info. A 2006 GT ZuM 4.0 is not just fun, it's great exercise as well; being in great shape is a great thing. Being a fun bicycle to ride, the 2006 GT ZuM 4.0 will turn you into an adventurous person. The 2006 GT ZuM 4.0 will have adrenaline pumping through your blood; it is perfect. You will have enjoyable escapades on this bicycle; you'll never be bored on this bike. The 2006 GT ZuM 4.0 is a beautiful mountain bike, and naturally, looks do matter. The delightful bike that is the 2006 GT ZuM 4.0 is an average cost bike; it's a brilliant choice for most bikers. User input on 2006 GT ZuM 4.0 by GT: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines