The BB on my Pinnacle Arkose Two is rocking when pedaling. From what I've read there isn't much that can be done to repair these sorts of BBs (and this might be out of my skill level) so I'm looking for a replacement. I've had the bike a year and have put about 2500 miles on it - wouldn't have expected the BB to break so quickly. I'd like to replace it with something else. Could somebody suggest something that might be better but still around the $40-70 price?