what did i just buy? cannondale crank content??

[AngryScientist]

i just bought this off ebay without really knowing what i was doing and hoping i can get it to work...

does anyone know anything about a "Cannondale One" crank?

I'm hoping to refresh my rain bike to 46/30 gears and hoping i can make this work. Any idea what BB i could use for this and if it will work in a 68mm road shell?

looks very similar to the easton cinch setup?

It was a hasty purchase and now i'm second guessing what i may have here.

https://i.ebayimg.com/images/g/VZYAAOSwAnhfTCDd/s-l1200.jpg

https://i.ebayimg.com/images/g/YSAAAOSwowhfTCDk/s-l1200.jpg

https://i.ebayimg.com/images/g/kSYAAOSw3KxfTCDh/s-l1200.jpg

[thegunner]

stock cranks from the 2020 cannondale SS's (i think it's meant for bb30a...)

[jtbadge]

This is going to be too short for BSA but it should fit this bike:

https://forums.thepaceline.net/showthread.php?t=256935&highlight=bb30a

[AngryScientist]

stock cranks from the 2020 cannondale SS's (i think it's meant for bb30a...)

ah hah.

i think if it has a 30mm spindle i should be able to use a BB to support that, i hope!

[AngryScientist]

This is going to be too short for BSA but it should fit this bike:

https://forums.thepaceline.net/showthread.php?t=256935&highlight=bb30a

how could it be too short for 68mm BB if it will bit 83? i dont get it?

[barnabyjones]

That's their entry level Hollowgram crankset. I believe it replaces the Si. The arms aren't a two piece construction like the top of the line SiSl2.

[jtbadge]

how could it be too short for 68mm BB if it will bit 83? i dont get it?

on the 83mm BB/PF30a, the bearings are inside the BB shell. On BSA30 setup, the bearings have to sit outside the frame, creating a width of 86mm. The spindle won't go all the way through.

[AngryScientist]

ah hah. looks like this may be back on ebay pretty quickly, lol.

[barnabyjones]

https://www.cannondale.com/en-us/bikes/road/gravel/topstone-carbon/topstone-carbon-ultegra-rx?sku=c15300m10xs

All-New, BallisTec Carbon, Kingpin suspension system, Proportional Response size-specific construction, Directline internal cable routing, BB30-83 Ai, 142x12 Speed Release thru-axle, flat-mount disc, removable fender bridge, multiple gear/bottle mounts, dropper post compatible

[AngryScientist]

Man, this is confusing stuff.

So many standards out there. BB30A, ha!

[AngryScientist]

ah hah again

The BB30a is similar to the BB30 standard, but the frame BB shell is 5mm wider on the non-drive side. BB30a system uses thin spacers and/or a wave washer between the bearings and the crank arms to take up any slack and micro-adjust the chainline of the crank.

so it appears this might yet work!

oye!

better do some measuring when the thing gets here.

[nighthawk]

https://wheelsmfg.com/threaded-to-30mm-abec-3-bb-black.html

Wheels Mfg makes a conversion BB (BSA30), but the crank spindle would have to be long enough, as jtbadge stated. Wheels suggests atleast 104mm, and I’m guessing the spindle on that crank is shorter.

[AngryScientist]

https://wheelsmfg.com/threaded-to-30mm-abec-3-bb-black.html

Wheels Mfg makes a conversion BB (BSA30), but the crank spindle would have to be long enough, as jtbadge stated. Wheels suggests atleast 104mm, and I’m guessing the spindle on that crank is shorter.

i'm guessing it might be long enough, given the BB30A designation, over BB30.

time will tell! there is virtually zero information out there about this crank online.

[barnabyjones]

JTBadge is correct. The BSA30 bearings would be spaced at 86mm as the cups are each about 9mm wide. You effectively change the BB width spacing to match BB386 or BB86. The spindle would be too short.

This is how Cannondale designed BB30 road spacings:

BB30- 68mm shell
BB30a- 73mm shell
BB30-83 Ai- 83mm shell (this is essentially their MTB standard)

Bearings inside the frame directly or in press fit cups.

[AngryScientist]

JTBadge is correct. The bearings would be spaced at 86mm as the cups are each about 9mm wide. You effectively change the BB width spacing to match BB386 or BB86. The spindle would be too short.

but doesnt the spindle for BB30A need to be 5mm longer to meet the new BB width?

[barnabyjones]

but doesnt the spindle for BB30A need to be 5mm longer to meet the new BB width?

The spindle is the length it needs to be to place the crank arms against the bearings. For BB30, it was 104mm and for BB30a it increased to 109mm. As BB30-83 Ai is 10mm wider than BB30a, the spindle should be 119 with the bearings inside an 83mm shell.

https://cannondaleexperts.com/collections/hollowgram-bottom-bracket-spindles/products/cannondale-bb30-spindle-119mm-superx-ai-kp450?variant=32079056863369

https://cannondaleexperts.com/collections/hollowgram-bottom-bracket-spindles/products/cannondale-bb30-bottom-bracket-119mm-ai-kp452?variant=31414187065481

Edit: an 83mm shell with a 2x set up requires a 125mm spindle
https://cannondaleexperts.com/collections/hollowgram-bottom-bracket-spindles/products/cannondale-bb30-bottom-bracket-125mm-ai-kp453?variant=31414190702729

Angryscientist, is your spindle 125mm?

[rice rocket]

The nice thing about those cranks is how modular they are, you can order various spindle lengths to make whatever fit. The downside is all the permutations and having to figure out what fits.

Enduro makes a set of 30mm conversion bearings for PF92 if that's your frame, but instead of sitting outside the frame like those Wheels Mfg ones, they are smaller and double row.

[happycampyer]

Man, this is confusing stuff.

So many standards out there. BB30A, ha!

“There’s that word again, ‘standard’!”*


* Said in the voice of OldPotato or Dr. Emmett Brown**


** “There’s that word again, ‘heavy’! Why is everything so heavy in the future? Is there a problem with the earth’s gravitational pull?”

[rice rocket]

To be fair, BB30/PF30 had a roughly 15-year run, which is long in this era, and had pretty good market penetration, at least in the US. Trek was really the only major holdout, Specialized had rebranded the standard as OS BB (until they made it narrower).

They only went to BB30A after they lost ground to the others. They certainly lasted longer than BBright, BB386EVO, BB90/BB95 or others.

[nighthawk]

i'm guessing it might be long enough, given the BB30A designation, over BB30.

time will tell! there is virtually zero information out there about this crank online.

Hope it works out for you. Keep us posted if you are able to make it work. Curious what inspired the purchase.Was it just cost and ring options?

[Davist]

Cannondale = proprietary. I had a bb30 frame that broke, they were kind enough to replace, but forgot to mention the new one was bb30a (even the sticker on the frame still said bb30). yuck.

[AngryScientist]

Hope it works out for you. Keep us posted if you are able to make it work. Curious what inspired the purchase.Was it just cost and ring options?

yea basically, i've been wanting to drop the front gearing on my rain bike to 46/30 on the cheap, since it just gets ridden in the worst conditions, and this popped up on ebay - i sent a cheap offer over and it was accepted immediately, so here we go.

it looks like if my spindle length is long enough it will work.

let's see what come in the mail!