Alex ALX-295, 24 hole, cassette, sealed bearing, black, alloy QR
I ride a 2005 Specialized Allez Elite that features the rear hub mentioned in the title. During a 60 mile ride Saturday I hear, intermittenly, some unsettling noise from the hub. I'm pretty sure it's coming from the hub due to the fact that the noise is present during coasting. Actually, it seems louder during coasting. When I returned home and spun the wheel by hand I believe I may have heard/felt some "grittiness" in the bearings.
Is this a cup and cone hub I wonder? Is it as easy to repair as, let's say, my late '70's Schwinn? Also, how similar to the Shimano 105 is my hub, could I use their exploded drawings as reference?
while "sealed bearing" can refer to cup and cone OR cartridge bearings, it's a term more commonly used in reference to cartridge bearing hubs these days. If it's a cup and cone hub, it's probably fairly similar to your shimano 105 hub. If it's a cartridge bearing hub, taking off the axle locknuts and "cones" to have a look won't do any harm.
If the bearings are bad, they went bad in under 3000 miles. Less than 60 miles of it in the rain and just a few washings. Were my hopes too high in thinking they'd last quite a bit longer than that?
Rule of thumb I heard was 10,000 on cup/cone wheel bearings ... cartridge should be even longer. My Deore rear lasted about 12k before the grit and ratcheting became obvious. $2 of bearings and some time and good as new.