My bike's better than me!
Joined: Feb 2005
Posts: 2,267
Likes: 395
From: Northern Colorado
Bikes: Moots Vamoots, 'Dale T2000, DB Response Comp, '98 G. Fisher HKEK, '89 Panasonic DX-6000, '88 Fisher Montare XT, '83 Nishiki Int'l, '72 MB GR, '75 MB GJ, '77 MB LC, '85 Centurion Ironman, '82 Miyata 710
Sora's really not inherently dramatically different from any other triple. It's not quite as light, not quite as durable (maybe), and may not shift quite as well ... but ... it's not substantively different than 105, Ultegra, or DA (dimensions are probbaly identical); therefore, when it's set up correctly, you ought to be able to get all but about the last two gears on your cassette (again, you shouldn't be doing even that too often, cuz' a) you don't need to (there's another comparable combo on another ring), and b) it's hard on the drivetrain.
Either find a better LBS wrench or (better) adjust the front der yourself.
ParkTool.com and SheldonBrown.com have good instructions.