Bottom Bracket Rebuild Question #2
10-10-10 | 09:06 AM
#1
Thread Starter
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From: Woodbury, MN
Bottom Bracket Rebuild Question #2
Seems BBs are popular today.
I'm starting to reassemble my 1981 Fuji America, I acquired it as a frameset, no headset, no BB...a frame and fork.
I have one of the the original Sugino Mighty Tour cranks thanks to another forum member but one thing I don't know is the length of the original BB spindle. It is built as a triple with the extra length Sugino chainring bolts to stack the third ring to the inside off the 110BCD holes.
What is the best way to determine the proper spindle length?
I know I can go down to the co-op and find any spindle length I need, along with cups, bearings, lock ring, etc. I just don't know what the process is for determining how long a spindle to use. Trial and error seems an inefficient way to do it!
Thanks.
I'm starting to reassemble my 1981 Fuji America, I acquired it as a frameset, no headset, no BB...a frame and fork.
I have one of the the original Sugino Mighty Tour cranks thanks to another forum member but one thing I don't know is the length of the original BB spindle. It is built as a triple with the extra length Sugino chainring bolts to stack the third ring to the inside off the 110BCD holes.
What is the best way to determine the proper spindle length?
I know I can go down to the co-op and find any spindle length I need, along with cups, bearings, lock ring, etc. I just don't know what the process is for determining how long a spindle to use. Trial and error seems an inefficient way to do it!
Thanks.
10-10-10 | 09:33 AM
#2
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Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Look in Sheldon Brown's site and he has a good list of cranks and typical spindle legnths for them to at least get you in the ballpark. Some BBs also have double adjustable cups (no fixed cup) to let you move the chainline left or right a little to ge your chainline close to perfect.
My French double cranks tend to typically need 118mm spindles. The Shimano DA7400 double crank that came with one of my bikes I bought last year was at 113mm. I'm thinking that your Sugino triple might need a 118 to 120mm? Again, check around, the internet can be your friend for information.,
Chombi
My French double cranks tend to typically need 118mm spindles. The Shimano DA7400 double crank that came with one of my bikes I bought last year was at 113mm. I'm thinking that your Sugino triple might need a 118 to 120mm? Again, check around, the internet can be your friend for information.,
Chombi
10-10-10 | 09:35 AM
#3
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From: Woodbury, MN
10-10-10 | 09:45 AM
#4
Be aware that you need a JIS taper spindle.
10-10-10 | 09:52 AM
#5
Senior Member
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Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
......Unfortuntely, sometimes you will neet to waste more than 20 minutes of time in the internet to find true Sugino triple wisdom.....
Chombi
10-10-10 | 10:28 AM
#6
PanGalacticGargleBlaster
Joined: Apr 2009
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From: Smugglers Notch, Vermont
Bikes: Upright and Recumbent....too many to list, mostly Vintage.
YEP!
Keep in mind you can use a JIS crankset on an ISO spindle but it will sit further inboard than it otherwise would.
Personally If I had access to a bunch of different sizes I'd just go play mix n' match until I got the inner chainrings nice and close to the frame without hitting.
Keep in mind you can use a JIS crankset on an ISO spindle but it will sit further inboard than it otherwise would.
Personally If I had access to a bunch of different sizes I'd just go play mix n' match until I got the inner chainrings nice and close to the frame without hitting.
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10-10-10 | 01:41 PM
#7
And it may bottom out and be completely useless. Keep it simple and use the correct spindle type. It's confusing enough.
10-10-10 | 08:56 PM
#8
Gone World Hepster
Joined: Oct 2005
Posts: 1,211
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From: Lincoln, NE
10-10-10 | 10:32 PM
#10
First off, measure the BB shell. I've seen some older Fuji's with 70mm shells even though they used english-threaded BB's. They came with Fuji branded BB's, BTW.
Next find a JIS spindle, mount one crank arm, measure how far off it is (on each side) and add/subtract the adjustment to the existing spindle to find the size you need. Check the fit between the cups as well. Still trial and error but a bit faster.
Next find a JIS spindle, mount one crank arm, measure how far off it is (on each side) and add/subtract the adjustment to the existing spindle to find the size you need. Check the fit between the cups as well. Still trial and error but a bit faster.
10-10-10 | 10:57 PM
#11
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From: Bastrop Texas
Bikes: Univega, Peu P6, Peu PR-10, Ted Williams, Peu UO-8, Peu UO-18 Mixte, Peu Dolomites
Dumb question but need to know - If this 1981 FUJI was using 1970s crank; might it NOT be using three rings up front - I know if there is two rings up front a 5s-b-70 (35-54-37.5) or a 5j-b-70 30.5-55-32 spindle with loose balls would work... In other words you may need to run two rings up front...
10-10-10 | 11:50 PM
#13
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From: Menomonee Falls, Wi.
Bikes: 82 Trek 613 Sport Touring, 84 Lotus Classique
Look in Sheldon Brown's site and he has a good list of cranks and typical spindle legnths for them to at least get you in the ballpark. Some BBs also have double adjustable cups (no fixed cup) to let you move the chainline left or right a little to ge your chainline close to perfect.
My French double cranks tend to typically need 118mm spindles. The Shimano DA7400 double crank that came with one of my bikes I bought last year was at 113mm. I'm thinking that your Sugino triple might need a 118 to 120mm? Again, check around, the internet can be your friend for information.,
Chombi
My French double cranks tend to typically need 118mm spindles. The Shimano DA7400 double crank that came with one of my bikes I bought last year was at 113mm. I'm thinking that your Sugino triple might need a 118 to 120mm? Again, check around, the internet can be your friend for information.,
Chombi
10-22-10 | 11:52 AM
#16
Cat 6
Joined: Dec 2007
Posts: 7,524
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From: Mountain Brook, AL
And when you determine the ultimate length, please enter it here:
https://velobase.com/ViewComponent.as...=115&AbsPos=14
Add the weight and any other items you can fill in as well
(My money's on a 119 length +3mm DS)
https://velobase.com/ViewComponent.as...=115&AbsPos=14
Add the weight and any other items you can fill in as well
(My money's on a 119 length +3mm DS)
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72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff
Last edited by Ex Pres; 10-22-10 at 12:21 PM.
01-02-11 | 12:02 PM
#17
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I know this is a bit after the fact, since KHatfull already has his bike back together (beautifull BTW)... I'm new here and was reading through all the old postings and found this one.
Well it so happens that I picked up a 1980 Fuji America last summer with all original parts and appears to have not been taken apart since 1980! Yes, most of the grease was very dried out. Anyway, winter project is a full cleaning and lubrication. So, now that I have the BB out I measured it for you.
It's marked "Sugino MT 68" and it's OAL is 119.2 mm
Well it so happens that I picked up a 1980 Fuji America last summer with all original parts and appears to have not been taken apart since 1980! Yes, most of the grease was very dried out. Anyway, winter project is a full cleaning and lubrication. So, now that I have the BB out I measured it for you.
It's marked "Sugino MT 68" and it's OAL is 119.2 mm
01-02-11 | 04:27 PM
#18
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From: Portsmouth, NH
01-03-11 | 10:49 AM
#19
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some more measurements...
(the peak is a ridge and these dims are to the ouboard edges)
LH end to "peak" = 29.8
RH end to "peak" = 38.0
peak to peak = 51.5
if they don't add up... then it's just the difficulty of measuring to the peak.
FYI - BB width on the frame = 68.0
(the peak is a ridge and these dims are to the ouboard edges)
LH end to "peak" = 29.8
RH end to "peak" = 38.0
peak to peak = 51.5
if they don't add up... then it's just the difficulty of measuring to the peak.
FYI - BB width on the frame = 68.0
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