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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-25-08, 01:46 PM   #1
adblink
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Was this built correctly? (with pics)

just bought my first (decent) bike, GT Avalanche.

They built it over the weekend and I just picked it up a few hours ago. To me, it looks like there is a cap of some sort missing. I can see the grease from the bearing. I can imagine how much dirt and crap could collect in there over time. None of the other bikes we have look like this....

see pics below





thanks
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Old 05-25-08, 02:54 PM   #2
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what you have is a seal BB and what you see is normal . even the grease is . if you haven't rode the bike yet now the time to wipe it away. if it dirty and you wipe it you will push the dirt into the bearing .
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Old 05-25-08, 03:01 PM   #3
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great, just wanted to double check, it just looked odd i wanted to make sure

thanks for your time
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Old 05-25-08, 09:08 PM   #4
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There is no cap missing either. Most recent square taper and hollow axle (Octalink and ISIS) bottom brackets use 8mm Allen bolts to retain the crank arms. What you are seeing is the 8 mm recess and these aren't capped.
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Old 05-28-08, 12:50 PM   #5
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phew thats a reflief. it just seemed odd to me that even a sealed bearing would be exposed like that, seems like a nice place for dirt and other junk to collect
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Old 05-28-08, 08:07 PM   #6
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It's not the bearing that's exposed. What you see is either grease from putting in the non-drive-side cup, or grease from greasing the interface between that cup and the cartridge (if the mechanic's a stickler).

In other words, it's not essential grease, nor do you see bearings. Wipe and ride.
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Old 06-02-08, 05:49 AM   #7
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aaaah ok. I could of sworn that blue part was part of the bearing
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Old 06-02-08, 05:55 AM   #8
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To me it looks like the left crank arm is awfully far away from the bottom bracket. Is it fully seated?
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Old 06-02-08, 01:14 PM   #9
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Love the frame finish. No love so much the aluminum brazing <yuck>.
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Old 06-02-08, 01:20 PM   #10
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Aluminum is welded, not brazed. It looks pretty good.
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Old 06-03-08, 12:03 PM   #11
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Yeah, that's a nice weld.

And I like the finish too.
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