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rans stratus bottom bracket dimension?
I have a rans stratus- circa late 80's, has a bottom bracket with a
spindle and loose bearings. Not a cartridge bottom bracket (though that really doesn't change the basic question) and have been using a 122mm length spindle (3ss spindle) . I bought the bike used and in changing out the spindle due to brinelling, found the chain line a bit askew. Not that it matters a huge lot with a long wheel based bike but it got me to wondering what was the length of the spindle as originally sold.Looks like I could go with a 118 or even a bit less (if I can find a spindle that size). Thanks Pat |
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rans stratus bottom bracket dimension?
On Sep 20, 8:13 am, patrick wrote:
I have a rans stratus- circa late 80's, has a bottom bracket with a spindle and loose bearings. Not a cartridge bottom bracket (though that really doesn't change the basic question) and have been using a 122mm length spindle (3ss spindle) . I bought the bike used and in changing out the spindle due to brinelling, found the chain line a bit askew. Not that it matters a huge lot with a long wheel based bike but it got me to wondering what was the length of the spindle as originally sold.Looks like I could go with a 118 or even a bit less (if I can find a spindle that size). Thanks Pat I should have added that the bike came with a sakae fx slp crankset of which I can find no relevant info by digging on the net. Pat |
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RANS stratus bottom bracket dimension?
patrick wrote:
I have a [RANS] stratus- circa late 80's, has a bottom bracket with a spindle and loose bearings. Not a cartridge bottom bracket (though that really doesn't change the basic question) and have been using a 122mm length spindle (3ss spindle) . I bought the bike used and in changing out the spindle due to brinelling, found the chain line a bit askew. Not that it matters a huge lot with a long wheel based bike but it got me to wondering what was the length of the spindle as originally sold.Looks like I could go with a 118 or even a bit less (if I can find a spindle that size). Did you try contacting RANS - back in the day they used to answer such questions? On a technical note, the damage to the bottom bracket bearings was most likely due to corrosion and/or fretting of the cup and cone surfaces. Any force great enough to produce true brinelling would likely destroy the frame, unless the old bottom bracket was made from pot metal. http://en.wikipedia.org/wiki/False_brinelling -- Tom Sherman - Holstein-Friesland Bovinia “Twisting may help if yawl can chew gum and walk.” - gene daniels |
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RANS stratus bottom bracket dimension?
Did you try contacting RANS - back in the day they used to answer such questions? On a technical note, the damage to the bottom bracket bearings was most likely due to corrosion and/or fretting of the cup and cone surfaces. Any force great enough to produce true brinelling would likely destroy the frame, unless the old bottom bracket was made from pot metal. http://en.wikipedia.org/wiki/False_brinelling -- Tom Sherman - Holstein-Friesland Bovinia “Twisting may help if yawl can chew gum and walk.” - gene daniels Hello Tom; Yep, I did shoot rans an email- no reply thus far. Thanks for the nomenclature clarification. Pat |
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RANS stratus bottom bracket dimension?
On Sep 21, 4:14 pm, patrick wrote:
Did you try contacting RANS - back in the day they used to answer such questions? On a technical note, the damage to the bottom bracket bearings was most likely due to corrosion and/or fretting of the cup and cone surfaces. Any force great enough to produce true brinelling would likely destroy the frame, unless the old bottom bracket was made from pot metal. http://en.wikipedia.org/wiki/False_brinelling -- Tom Sherman - Holstein-Friesland Bovinia “Twisting may help if yawl can chew gum and walk.” - gene daniels Hello Tom; Yep, I did shoot rans an email- no reply thus far. Thanks for the nomenclature clarification. Pat One trick I saw a guy do a few years ago and it worked fine was to use a piece of hardwood in place of a tensioning chain gear. Once worn in a bit it lasted a long time and did a good job even though it didn't turn. See if I can find a picture. |
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