I've got an old (1997 model I believe) Specialized Stumpjumper S-Works M2 (say that three times quickly!), as a spare bike which I would like add a rear disc to. Of course the frame itself is way too old to have original come with disc tabs, hence the question.
I first checked out the A2Z adaptor (http://www.woollyhatshop.com/view_product.php?id=731) but after some nice communications with the folks at the WoollyHatShop (thanks bunches to them!) they feel the adaptor won't work on my frame - apparently certain Specialized models won't work - something to do with the shape of the dropout.
I investigated the Woodman Disco adaptor (http://www.woodmancomponents.com/catalog/categorie.php?cat=dis&lang=en) but the site mentions they recommend their own hub. I'm guessing the adaptor will work with any hub, but don't know.
So - any ideas? Any experience with either of these products, or any others, on a similar Stumpy frame? I've posted a pic of the dropout (left-hand side) in case that helps at all at http://www.flickr.com/photos/krixmeister/3365488667/
Any help/ideas appreciated!