What are some good tires for my bike? I have a 2009 iron horse warrior 4.0. The tires that came on the bike are already toast after 2 weeks of riding(ITS Ninjas??) Im looking at the maxxis swampthings but was wondering if I have to stick with the same width size of the original tires. The current size of the tires(ninjas) are 26x2.1 and 26x2.35. I can only find the swampthing in 2.5 is this ok? What size tires would you guys recommend? I mostly do rocky uphill, dh, jumps and trails. Any advice is appreciated, Thanks!