Are stem risers such as the "Delta Stem Raiser" strong enough for XC mountain biking (not downhill)? What other options are there for achieving 12 cm of rise or more with a threadless (1") system?
I'm building up my hardtail Fat Chance Yo Eddy mountain bike after a repaint. She looks sweet. I have some On One Midge bars to put on the bike (these are like the dirt drops, with shallow drops), but I'm having trouble with the fit. The Midges are supposed to be run with the tops of the bars about equal to top of the seat. Trouble is, I'm 6' tall, with somewhat long legs, and I have to use a fairly long seatpost extension on the bike. So I cannot find any threadless stems that give the rise I need to make this comfortable. I have a Delta 1" stem riser that I tried on it, and using that I can get the bars in a near perfect position (without using the full extension it provides). I hate using this for aesthetic and weight reasons... however, comfort needs to win out over aesthetics, since I plan to do some really long rides with the bike (> 12 hours). So my main question as posed above is, are these stem risers safe for cross country use? My LBS told me no. But I have googled and googled, and not found any hints of people having failure problems with these, so I suspect my LBS is just being overly conservative. The riser seems pretty beefy.
If there is another option, I'd love to hear it. The only other option I can come up with is to ditch the handlebars or get a new bike, neither of which I want to do right now.
Thanks in advance,