I'm looking into putting some heavy duty inner tubes in my bike, but I don't know where to star. So far I've seen some Maxxis Downhill tubes for 26x2.5 inches. Currently my tires are only 26x2, if I were to get these tubes would I need to invest in some wider tires? And secondly, I don't know how big of tires my bike will accomidate. I have a Giant Rincon and as I said, the current tires are 26x2. Does anybody have any advice or suggestions?