markz
100 TW
Threaded BB
3 Piece bottom bracket
Square taper
90mm Shell
Nut style retainer for crank arms, not bolt
16.26mm diameter axle (in the middle)
Bent my bb on a fall on the crank side. At first I thought just the crank bent, but I replaced crank to confirm it has a 3-4mm wobble from small gear to edge of bb shell and the 'bent-in' side is on the pedal side. Pics taken and its noticeable.
When taking the BB apart, I took the axle to a straight edge and its obviously bent. Pics taken and its noticeable.
Weight wise, 52V 14.5Ah Grin battery on top of top tube, another battery in the triangle 36V 20Ah, controller on top tube.
I am 325lbs. Fell onto crank side, bent basic outer metal pedal edge inward, got me a big ole scab, even bigger bruise and road rash on the top part and its taken 1 month to get to red.
I took lots of pictures.
Its got the threaded cups on either end, took an adj wrench to take off the drive side, and the cup came out with greased bearing ring inside then I took the axle itself out with the bearing ring on the axle, I left the other side cup on. Looks good that there's lots of grease in there. I was concerned when undoing the threaded cup because lots of sandy bits came out. Looked inside the BB and it wasnt to bad. Did the usual WD40 and paper towel to clean it all up.
One option I thought of is to buy a mid drive bb from Cyclone Taiwan which comes in square tapered 68-120 and use it on my front hub ebike. Luna has both styles of bb axle in 68-100. But if I go that route, might as well install my Cyclone 4kw.
I see 80mm shell width come in cartridge, some proprietary Trek's come close to 90mm, can't find no cartridge for 90mm shell. All I can find for 3 pc's are 68 shell widths.
What do you figure, where to buy a 3pc bb with 90mm shell and 175mm? 195mm? axle (do you count the threads or just end of tapers.
3 Piece bottom bracket
Square taper
90mm Shell
Nut style retainer for crank arms, not bolt
16.26mm diameter axle (in the middle)
Bent my bb on a fall on the crank side. At first I thought just the crank bent, but I replaced crank to confirm it has a 3-4mm wobble from small gear to edge of bb shell and the 'bent-in' side is on the pedal side. Pics taken and its noticeable.
When taking the BB apart, I took the axle to a straight edge and its obviously bent. Pics taken and its noticeable.
Weight wise, 52V 14.5Ah Grin battery on top of top tube, another battery in the triangle 36V 20Ah, controller on top tube.
I am 325lbs. Fell onto crank side, bent basic outer metal pedal edge inward, got me a big ole scab, even bigger bruise and road rash on the top part and its taken 1 month to get to red.
I took lots of pictures.
Its got the threaded cups on either end, took an adj wrench to take off the drive side, and the cup came out with greased bearing ring inside then I took the axle itself out with the bearing ring on the axle, I left the other side cup on. Looks good that there's lots of grease in there. I was concerned when undoing the threaded cup because lots of sandy bits came out. Looked inside the BB and it wasnt to bad. Did the usual WD40 and paper towel to clean it all up.
One option I thought of is to buy a mid drive bb from Cyclone Taiwan which comes in square tapered 68-120 and use it on my front hub ebike. Luna has both styles of bb axle in 68-100. But if I go that route, might as well install my Cyclone 4kw.
I see 80mm shell width come in cartridge, some proprietary Trek's come close to 90mm, can't find no cartridge for 90mm shell. All I can find for 3 pc's are 68 shell widths.
What do you figure, where to buy a 3pc bb with 90mm shell and 175mm? 195mm? axle (do you count the threads or just end of tapers.
Attachments
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20210724_193222.jpg269.6 KB · Views: 642
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20210724_184315.jpg140.1 KB · Views: 642
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Non drive side axle.png167.2 KB · Views: 642
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Non drive side.jpg246.3 KB · Views: 642
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Axle non drive side.jpg240.1 KB · Views: 642
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BB shell 90mm.jpg205.4 KB · Views: 642
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Bent axle on left, 195mm.jpg351 KB · Views: 642
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Bent axle, bearings non drive side.jpg195.6 KB · Views: 642
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Bent axle.jpg199.4 KB · Views: 642
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Bent BB 1.jpg176.9 KB · Views: 642
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Bent BB 2.jpg230.4 KB · Views: 642
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Bent BB 3.jpg196.9 KB · Views: 642
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drive side measurement.jpg143.9 KB · Views: 642
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Drive side retainer race.jpg262.1 KB · Views: 642
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Drive side retainer.jpg254.3 KB · Views: 642
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Good side of axle - non drive side.jpg203.9 KB · Views: 642
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Non drive side axle.png167.2 KB · Views: 642
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Non drive side from ride to threads.jpg131.8 KB · Views: 642
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non drive side measurement 1.jpg148.5 KB · Views: 642
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non drive side measurement.jpg139.9 KB · Views: 642
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Non drive side retainer race.jpg238.5 KB · Views: 642
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rear dropout width.jpg142 KB · Views: 642
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width of axle in the middle.jpg167.8 KB · Views: 642