2018 Tarmac S works SL6 - Dura Ace 9100 Cranks Compatibility

Discuss light weight issues concerning road bikes & parts.
L3X
Posts: 336
Joined: Wed Feb 25, 2009 8:39 pm

by L3X

I only used the Praxis one and was very happy with it. The enduro design seems very similar so wouldn't mind that one either. I quie like those that thread together in the middle, usually this avoids all kinds of nasty creaks :)

juang1985
Posts: 9
Joined: Fri Dec 21, 2018 3:00 am

by juang1985

After some research and contacting a few bike shops it looks like this is what I will need to make my crankset work

BB30 to 24mm Bottom bracket ( I went with ceramicspeed)


https://sportfactoryproshop.com/ceramic ... lYQAvD_BwE

Will this work out guys?

Thanks

by Weenie


nemeseri
Posts: 749
Joined: Tue Apr 07, 2015 5:40 pm

by nemeseri

Because you already have the bearings installed, you have two main options:
1A) Go the official specialized way and install the reducer cups. You should be able to order it from any specialized dealer: Part # S121600003. You will be able to tap the reducers into the bearings like described here: https://media.specialized.com/support/0 ... 4_revC.pdf
1B) As an alternative you can order third party reducer cups, like this one: https://wheelsmfg.com/bb30-adapter-for- ... ranks.html
2) You can have your LBS remove the ceramic bearings from the frame and install a proper 30 to 24 conversion BB. You do not need to buy the most expensive one, for example Wheels Mfg makes many different BBs fitting almost any budget. Or from kogel. Or from c-bear. Like something like these:
https://wheelsmfg.com/bottom-brackets/b ... black.html
https://www.kogel.cc/products/bb30-24-f ... 4780966090

Option number 1 is much cheaper than option number 2 and if the bearings are installed properly you can just forget about the whole issue. Also you can probably do this by yourself. This way you will keep the fancy ceramic bearings also.

Option 2 is a more bulletproof solution given with a proper conversion BB, you can elliminate possible creaks better. BUT I'd let a professional remove the old bearings from the frame and install the new BB. Personally I'd probably pick a mid-level wheels mfg BB with angular bearings. It's like a bit more than $100 bucks and screws together. If you want something more high-end, kogel can be a good pick. I'd never ever pay more than $200 for a BB (it's hard to justify anything over $150). I also do not believe in ceramic bearing BS in the case of bicycles. Some of these BBs require special bearing presses or tools. You should check with your LBS which one they would recommend or have experience with.

juang1985
Posts: 9
Joined: Fri Dec 21, 2018 3:00 am

by juang1985

nemeseri wrote: ↑
Thu Jan 17, 2019 6:40 am
Because you already have the bearings installed, you have two main options:
1A) Go the official specialized way and install the reducer cups. You should be able to order it from any specialized dealer: Part # S121600003. You will be able to tap the reducers into the bearings like described here: https://media.specialized.com/support/0 ... 4_revC.pdf
1B) As an alternative you can order third party reducer cups, like this one: https://wheelsmfg.com/bb30-adapter-for- ... ranks.html
2) You can have your LBS remove the ceramic bearings from the frame and install a proper 30 to 24 conversion BB. You do not need to buy the most expensive one, for example Wheels Mfg makes many different BBs fitting almost any budget. Or from kogel. Or from c-bear. Like something like these:
https://wheelsmfg.com/bottom-brackets/b ... black.html
https://www.kogel.cc/products/bb30-24-f ... 4780966090

Option number 1 is much cheaper than option number 2 and if the bearings are installed properly you can just forget about the whole issue. Also you can probably do this by yourself. This way you will keep the fancy ceramic bearings also.

Option 2 is a more bulletproof solution given with a proper conversion BB, you can elliminate possible creaks better. BUT I'd let a professional remove the old bearings from the frame and install the new BB. Personally I'd probably pick a mid-level wheels mfg BB with angular bearings. It's like a bit more than $100 bucks and screws together. If you want something more high-end, kogel can be a good pick. I'd never ever pay more than $200 for a BB (it's hard to justify anything over $150). I also do not believe in ceramic bearing BS in the case of bicycles. Some of these BBs require special bearing presses or tools. You should check with your LBS which one they would recommend or have experience with.

Thanks for Taking the time to lay out the options mate. I ended up going for option 2, I ordered the ceramicspeed BB30-24mm( Overkill I know)

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