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Old 10-03-07, 09:33 AM   #1
rc50
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crank arm fixing bolts

HI all... I just changed my bottom bracket from cup and cone to a cartridge style... i didn't get any crank arm fixing bolts... what size are they? can i get them from a good hardware store ? any and all help would be great....

thanks a ton

rc
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Old 10-03-07, 10:27 AM   #2
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HI all... I just changed my bottom bracket from cup and cone to a cartridge style... i didn't get any crank arm fixing bolts... what size are they? can i get them from a good hardware store ? any and all help would be great....

thanks a ton

rc
More detailed information needed in order for anyone to begin imparting any 'wisdom'. Type/model, square taper or splined, if splined what pattern, etc..
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Old 10-03-07, 10:28 AM   #3
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One side is left hand thread so a hardware store is a no-go. Don't you have the ones from the old BB. If not your LBS or someplace like biketoolsetc.com will have them.
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Old 10-03-07, 10:31 AM   #4
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hi sorry i agree.... it is a shimano square tapered.. 68mm 107 mm long... sorry again.. thanks for any and all help
i am just getting into working on bikes... so know almost nothing but what i read..
again sorry and thanks

rc
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Old 10-03-07, 10:33 AM   #5
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no sorry the old BB was a cup and cone style and used nuts to hold the crank arms on...

thanks for the info

RC
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Old 10-03-07, 11:04 AM   #6
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One side is left hand thread so a hardware store is a no-go.
That is not true. Both bolts will be a standard RH thread. The easiest thing to do is go to your LBS (Local Bike Shop) and get some there. Otherwise, they are almost certainly metric and my guess would be M6x1mm, although I'm not sure.
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Old 10-03-07, 11:45 AM   #7
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i have tried the "local" bike shop thought i was crazy as they sale only the current in "fad" bikes lol what a joke... neely to say they didn't have them....
thanks a ton
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Old 10-03-07, 11:49 AM   #8
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Use the ones off the BB you just removed. They're the same M8*1 bolts. Your standard hardware metric bolt would probably be an M8*1.25.

Last edited by vpiuva; 10-03-07 at 11:54 AM.
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Old 10-03-07, 11:54 AM   #9
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hi thanks... i would do just that.... but the BB i removed was an old cup and cone type BB it used nuts... not bolts...

thanks..

RC
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Old 10-03-07, 12:00 PM   #10
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hi thanks for all the help... i checked biketoolsetc.com and they say it takes a standard english thread.... so thanks a ton people for all the help.... have a great one!!!!


RC
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Old 10-03-07, 12:01 PM   #11
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(click to buy)
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Old 10-03-07, 12:02 PM   #12
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hi thanks for all the help... i checked biketoolsetc.com and they say it takes a standard english thread.... so thanks a ton people for all the help.... have a great one!!!!


RC

Standard english thread is for the cups, not the crankarm fixing bolt
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Old 10-03-07, 12:02 PM   #13
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That is not true. Both bolts will be a standard RH thread. The easiest thing to do is go to your LBS (Local Bike Shop) and get some there. Otherwise, they are almost certainly metric and my guess would be M6x1mm, although I'm not sure.
You're right. I didn't completely engage the brain before typing.
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Old 10-03-07, 12:13 PM   #14
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hi thanks... i would do just that.... but the BB i removed was an old cup and cone type BB it used nuts... not bolts...

thanks..

RC
Sounds like his old BB was for an old COTTERED crank. I suspected that when he mentioned cup and cone.
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Old 10-03-07, 12:21 PM   #15
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hi nope was not a cottered crank... old sugino crank thanks
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Old 10-03-07, 12:22 PM   #16
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thanks for all the help but check this web sight ...

http://www.biketoolsetc.com/index.cg...d=TA-LN3968107
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Old 10-03-07, 12:23 PM   #17
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Well, there are a lot of old cup and cone BB's that are cotterless, that use a threaded stud that requires a nut as opposed to a bolt. I imagine that is what he has, since he didn't say anything about new cranks.

I'm also assuming he is a he which may or may not be true.
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Old 10-03-07, 12:32 PM   #18
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hi nope was not a cottered crank... old sugino crank thanks
No, thank YOU! Jeez, the old school stuff is hard to dismember sometimes. LOL.
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Old 10-03-07, 12:48 PM   #19
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thanks for all the help but check this web sight ...

http://www.biketoolsetc.com/index.cg...d=TA-LN3968107
Your local bike shop would be best. They probably have a ton of them. You might even be able to get on that works with an allen wrench...those will work too. Should only cost you a couple of bucks.
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Old 10-03-07, 06:52 PM   #20
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Your local bike shop would be best. They probably have a ton of them. You might even be able to get on that works with an allen wrench...those will work too. Should only cost you a couple of bucks.
The LBS is certainly the place and they will be free to low cost for the standard hex head types. The newer allen wrench types may be a few dollars but they are more convenient and don't require dust covers.

BTW, the threading is M8x1.0mm and your hardware store is not likely to have metric bolts in that thread pitch.
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Old 10-03-07, 09:24 PM   #21
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I had a crank axle or two in the past that used nuts instead of bolts. (three-piece)
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Old 10-04-07, 07:25 AM   #22
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Yep, seen plenty of square tapers with threads at the end. Your LBS should absolutely have a set of crank bolts. In fact, your new BB should have come with them.
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Old 10-04-07, 08:23 AM   #23
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Yep, seen plenty of square tapers with threads at the end. Your LBS should absolutely have a set of crank bolts. In fact, your new BB should have come with them.
Not usually. All of my crank bolts came with the crank, not the BB.
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Old 10-04-07, 10:12 AM   #24
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Replaced the BB and the Crankset on my RANS last winter. They both came with bolts. Can't use all 4 at the same time so I rotate them out. Ha, ha.
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