Tandem Cycling - 69er Tandem?

I purchased a barely used Trek T900 on Craigslist and made some upgrades to see if my eight year old and I would enjoy riding single track together. We love it! The bike has been solid and we are able to keep up with the singles(passing some), however as some of you predicted we found the limits of the bike quickly(ground clearance). I recently purchased a 29er single which I find superior to the 26. I'd like a rigid Fandango 29er but I've reached my yearly new bike quota. I found a SunRyno 48 Hole 29er rim and thought of matching it to a Surly rigid fork. Any thoughts on increased ground clearence and possible toe overlap. Thanks

are you thinking of using the surly instigator fork? i looked at this one when i owned a T900, the steertube is not long enough. i suggest that you try Cannondales Fatty fork for 700c wheels, it has enough steertube length for the T900. also, you may want to explore the disc brake option on the rear and there may even be a chance to fit a 29er there. i believe there is enough room for toe overlap, i ended up selling the T900 before trying a 700c or 29er wheelset.

Thanks for the reply. Wow, your right. Forgot about the looong head tube. I was thinking of the Surly Karate Monkey 29er fork w/both disc and rim compatability.

Thanks for the reply. Wow, your right. Forgot about the looong head tube. I was thinking of the Surly Karate Monkey 29er fork w/both disc and rim compatability.

is that tandem rated? i believe it's only the instigator that is tested and rated for tandem use. you might want to check with surly first.