Another bb / spindle problem
#1
Senior Member
Thread Starter
Another bb / spindle problem
Going from a trekking triple deore with their “mountain” bb (that’s all it says on the part), to an FSA 46/30 megaexo crank and FSA bb 1000.
The bb 1000 seems to be a universal bb to handle both road or mountain bb sizes 68/73. I’ve tried all manner of spacer configurations but the crank clamps the bearing every time. After multiple tries, I’ve buggered the threads on the bb1000.
The bb1000 seems happiest with one spacer each side, but still doesn’t stop the clamping.
Wrong crankset?
Thanks for any help.
Buggered in Kenosha
The bb 1000 seems to be a universal bb to handle both road or mountain bb sizes 68/73. I’ve tried all manner of spacer configurations but the crank clamps the bearing every time. After multiple tries, I’ve buggered the threads on the bb1000.
The bb1000 seems happiest with one spacer each side, but still doesn’t stop the clamping.
Wrong crankset?
Thanks for any help.
Buggered in Kenosha
#2
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Going from a trekking triple deore with their “mountain” bb (that’s all it says on the part), to an FSA 46/30 megaexo crank and FSA bb 1000.
The bb 1000 seems to be a universal bb to handle both road or mountain bb sizes 68/73. I’ve tried all manner of spacer configurations but the crank clamps the bearing every time. After multiple tries, I’ve buggered the threads on the bb1000.
The bb1000 seems happiest with one spacer each side, but still doesn’t stop the clamping.
Wrong crankset?
Thanks for any help.
Buggered in Kenosha
The bb 1000 seems to be a universal bb to handle both road or mountain bb sizes 68/73. I’ve tried all manner of spacer configurations but the crank clamps the bearing every time. After multiple tries, I’ve buggered the threads on the bb1000.
The bb1000 seems happiest with one spacer each side, but still doesn’t stop the clamping.
Wrong crankset?
Thanks for any help.
Buggered in Kenosha
Did the bottom bracket ship with 3 spacers?
#3
Senior Member
Thread Starter
Thank you, Dan. According to FSA, this bb is capable of either 68 or73 mm.
It did ship with 3 spacers.
I do not have a caliper, so actual shell number is unknown. Could it be more than 73? It’s a -17 masi Giramondo 27.5 version. The website has no spec on this area.
not going e-mech. Just manual shimano 105.
It did ship with 3 spacers.
I do not have a caliper, so actual shell number is unknown. Could it be more than 73? It’s a -17 masi Giramondo 27.5 version. The website has no spec on this area.
not going e-mech. Just manual shimano 105.
#4
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Thank you, Dan. According to FSA, this bb is capable of either 68 or73 mm.
It did ship with 3 spacers.
I do not have a caliper, so actual shell number is unknown. Could it be more than 73? It’s a -17 masi Giramondo 27.5 version. The website has no spec on this area.
not going e-mech. Just manual shimano 105.
It did ship with 3 spacers.
I do not have a caliper, so actual shell number is unknown. Could it be more than 73? It’s a -17 masi Giramondo 27.5 version. The website has no spec on this area.
not going e-mech. Just manual shimano 105.
Anyhow, if the bottom bracket shell is 68mm and the front derailleur is not E type, it should take two spacers drive side and one non drive.
#5
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For clarification, the “E type” refers to the ones that have a mounting bracket that is held on by the BB and so it acts as a spacer and changes the number of spacers required. Not a reference to electronic vs manual.
#6
Senior Member
Thread Starter
Good to know! Thank you for the correction. Is “braze on” still acceptable for the front mech mount?
#7
Senior Member
Thread Starter
It has been a long time since I installed one of those, but I seem to remember there are washers that go between the crank and the bearings, and they must be oriented the correct way so they push against the inner bearing race. Put em in backwards and you get the symptom you describe.
Anyhow, if the bottom bracket shell is 68mm and the front derailleur is not E type, it should take two spacers drive side and one non drive.
Anyhow, if the bottom bracket shell is 68mm and the front derailleur is not E type, it should take two spacers drive side and one non drive.
This is why I am loyal.
#8
Really Old Senior Member
25.4mm=1"
73mm=2.874 or 2-7/8",
68mm is "about" 3/16" less.
Is math that hard?
73mm=2.874 or 2-7/8",
68mm is "about" 3/16" less.
Is math that hard?
#10
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Outboard bearing type MTB bottom brackets are shipped with three spacers to work with everything from a 68 mm shell without an E type derailleur to a 73 mm with E type.
So a 73 mm without an E type still requires one spacer on the drive side.
#11
Really Old Senior Member
Ergo: WRONG
Just because YOU haven't seen it, doesn't mean it doesn't exist.
A problem that frequently occurs on this forum by too many of the younger "know it alls".