I own a 2009 Specialized Crosstrail Sport, which is a hybrid 29er. This bike with 700 x 38tires has been used exclusively for commuting up until this summer where I have taken it on some single track trails and gravel roads. Riding this bike on trails and gravel roads beats the heck out of me. First and foremost the RST Neon fork with 60mm of travel does not seem to absorb bumps whatsoever and the 700 x 38 tires grip well but lack air volume to further exasperate the pounding. Since the frame fits me well, would it be worth it to buy an 80mm Rockshox Dart 3 fork and 29 x 2.0 tires for this bike or should I sell it and buy a 29er mountain bike? Both the new fork and the tires will cost about $250.00 and a new 29er HT mountain bike will be in the upwards of $900.00. I’m not 100% sure if the 29 x 2.0 tires will fit in back of the frame but it looks very close. Lastly, will the new fork and the larger volume tires really absorb the bumps and big hits much better than what I have right now? Note; that I ride the same single track trails and gravel roads on my 2009 Epic dual suspension 26er so maybe a top of the line 29er HT would beat me up as well.