BBright and Power Meters

I've been reading through the posts about bottom brackets that fit BBright and can't seem to understand what bottom bracket type is the "recommended" one if I want to add a crank based power meter.

BBright and Power Meters

Yes, it can be tough to see the clear picture. There are certainly a lot of options to understand!

Actually, there are native BBrightTM power meter cranks:

  • Rotor 3D+ (with an SRM or Power2Max spider)
  • SRAM Quarq "BB30" (unlike typical BB30 cranks, the Quarq's axles are long enough for BBright)
  • Rotor Power®

All these fit natively in BBright’s 30mm ID bearings.

If you already have a different power meter, there are still solutions:

  • For Shimano & compatible cranks, use Rotor 4624 BBright bottom bracket (or Wheels adapters in BBright's 30mm bearings).
  • For SRAM GXP cranks, use Rotor 4624 BBright bottom bracket, with their GXP sleeve added (or Wheels adapters in BBright's 30mm bearings).
  • For FSA MegaExo cranks, use FSA's BBright bottom bracket.

Those are all the options we’re aware of for power meter cranks in BBright frames.

What do people use in practice…?

For years now, Team Garmin-Sharp riders have used Rotor 3D+ cranks with SRM power meters in their Cervélos. Here at Cervélo headquarters, a lot of Cervélo employees have Quarqs or Rotors. They both fit directly in the BBright bottom bracket, and work very well. One Cervélo employee uses a Rotor 4624 BBright bottom bracket with a Quarq spider mounted on a Rotor 3D crank (not the 3D+). This crank has a 24mm axle, and this combination also works well.

Which crank options should you choose?

If you're looking at a new SRAM Quarq, specify "BB30" and it will fit perfectly. Just replace the plastic adjuster thingy on the left with a wave washer and up to two 0.5mm thin plastic spacers, whatever it takes to compress the wave washer but not flatten it.

If you’re looking at Rotor, just specify the 3D+ (the plus sign “+” indicates the bigger 30mm diameter axle).

Enjoy riding your Cervélo with power!

--

A Few Helpful Links

If you’re installing one of these bottom brackets, you must follow BBright’s specific instructions about LocTite and Primer. They’re in a PDF linked at the bottom of the BBright home page.

Comments (27)
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  • Laineys Grandpa

    Happy to be part of my new family here at Cervelo. Since my daughter is a grad of McGill class of 2005 there was no option for a bike purchase other than a Cervelo Mahalo!

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  • Patricio

    Hello, I just bought a P# 2014 and I want to change the crankset for a SRAM RD. I bought BB30 but it doesn't fit. What should I do? which is the right one to buy?. Can I still adapt it changing the bottom bracket? Thanks

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  • Pamela

    looking at purchasing Garmin vector for my P5- thoughts? which size does it require?

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  • seb

    Just received my new R5 2014 model. I thought there would be internal routing for the cables. Can you advise on best place to drill holes to feed cable for di2. Also there is no instructions on how to measure and cut the forks, please advise. Many thanks Subhas

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  • Noel

    Hello, I have a 2012 S5 and I was wondering if the Pioneer power meter work with it. Thank you.

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  • Ake

    Hi, I have a 2014 P3 frame that I am trying to build with Shimano Ultegra 6800 components. I followed the advice on this thread and bought the Rotor Bbright 4624 road bottom bracket. However, after installing the chainring side of the crank, it appears that the crank shaft only protrudes about 4-5 mm past the bottom bracket on the non-drive side. As a result, I am not able to install the non-drive side crank because there is not enough real estate left on the length of the crank shaft. What happened? Did I get the wrong part from Rotor? I called them to confirm and they said this was the right part. Looking forward to your advice. Thanks.

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  • I have a few questions around the S3 as I want to build my own, so with that said; 1) Being advised by my dealer that the frames sets alone are not avaiable, can you advise where I can buy the frameset only, directly from Cervelo? 2) On the BBright, what's required if I want to fit Campy or Dura Ace crankset

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  • Andreas

    I want to install a Shimano Ultegra 6800 crank on my Cervelo P3 Ultegra 2014 mod. Then I can use my Stages power meter which is on a Ultegra crank arm presently sitting on my Trek bike. Question is which bottom bracket will fit my Cervelo P3 and accommodate for Shimano Ultegra 6800 crank?

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  • Bryan

    Just wanted to mention that our new Powermeter, InfoCrank Classic fits perfectly on my Cervelo S5 with BBright using the Rotor 4624 BB. So now we have accurate power measuring both of my less than equal legs on my favourite bike. Looks like my choice for the UWCT Final in Slovenia!!!

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  • Dale R

    Just recently received my new 2014 S3 and want to throw in my kudos to the design team...well done. It will be built up with Shimano Dura Ace 9000 groupset and a beautiful set of FFWD F6C 58mm carbon clinchers.

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  • Kjetil Harms

    Hi, have a 2012 R3 Team and want to install Stages crankarm (175mm) It`s FSA BBright 50/34T Crank orginal mont Can I use this model? http://www.stagescycling.com/stagespower-models-rd#model_18 Thanks in advanse Kjetil Harms

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  • Richard

    I'm hoping to increase the size of my chainrings and replace my BB but with the different sizes and new BB I'm not sure which one is for mine. Can it be checked if I use a 110/130 bottom bracket

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  • mpj0930

    Hi, I own the stages power meter on a Shimano 105 crankset. I'm thinking about getting the New P2. Question is what Bottom bracket would I need in order to use the power meter on the P2. From the looks of it, it seems it would be the Rotor press fit 4624. Am I right ?

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  • rlskaggs

    Hi Damon, I recently bought a P5-3 frame that has Rotor 4624L BB installed. Couple of questions: 1) I want to install my 2012 SRAM S975 GXP power meter and cranks and do not want to remove and replace the cups or BB as a whole. You mention a 'GXP sleeve' above. Would this do the trick? If so, do you know where I might acquire one? No luck thus far searching the web. 2) (not BB related) Does Cervelo have a shifter cable installation guide for P5-3? I'm not installing electronic shifting and the only installation guide I have found deals with Di2. My concerns: a) location of rear derailleur cable stop. Is it deep within the chainstay, requiring longer cable housing than as typical?, b) is there a plug or guide required at the odd shaped hole where the front derailleur cable exits the frame? Thanks for any insight you can provide.

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  • kmicho01

    On January 2014 I bought P5 Six DA size 51 with Rotor 3D 167.5 size crankset and I would like to ask if Garmin Vector can be installed. Thanks!

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  • Giuseppe

    Gent.mo Ing. Rinard, a gennaio scorso ho acquistato una Cervélo R5 DA con guarnitura 3D+ con corone tradizionale 52-36. Dopo circa 20 giorni ho sostituito in garanzia la guarnitura perché le corone erano storte. Oggi dopo due mesi il problema si è ripresentato. Ma come è possibile che ciò accada? Potrebbe gentilmente darmi una spiegazione tecnica plausibile ed eventualmente anche la soluzione tecnica? La ringrazio per il tempo che mi dedicherà e colgo l'occasione per porgerLe distinti saluti. Distinti saluti

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  • Dr T

    hi, i recently bought a p5, my new pride and joy, after having had a p3 for 8 years. it is a lovely frame, i have installed the bbright press fit bottom bracket using the appropriate park press tool, have attached some rotor 3d aero cranks and the resistance to rotation is massive, the crank will only do half a turn if i give it a good push with my hand, any of my other bikes will do 5 or 10 turns or more, if i rest the crank arm vertically upwards it does not fall down. The bearings pushed in seemingly fine, just pushed them in until the plastic surround went flush with the frame. The spindle went through the bearings with a little tap but compared to my p3 with its sealed bottom bracket unit the friction is immense. Please can you help, was hoping to finish building so that i could use it for my first race this season. Many Thanks Tristan

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  • mann83

    I have a Stages Power Meter on a Sram Rival GXP crank set. What BB do I need? Is it the Rotor 4624 BBright bottom bracket as listed above?

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  • Damon Rinard, Cervélo Engineer

    Hi John, no need to check serial number. All P5s have the "PressFit" version of BBright, with 46mm diameter frame. (Only the R5ca has "DirectFit" version of BBright, with 44.5mm frame). To install your Rotor 3D crank (not 3D+), you need Rotor's "BBright to 24" bottom bracket. It has 46mm cups to fit in your new P3 frame, and 24mm bearings to fit your 3D crank's axle. Be sure to follow the installation instructions linked (in PDF) at the bottom of the BBright page, http://bbright.net/. I'm guessing here, but you might be thinking of whether your P5 has the vestigial ridges some people have sanded down. Only the first batch of P5s had those, but we don't have a reference serial number. Just look inside and you can easily tell. If you have one, no worries, just follow the instructions I posted on Slowtwitch for another athlete here, complete with sketch showing where to sand and where not to: http://forum.slowtwitch.com/cgi-bin/gforum.cgi?post=4671409#4671409 Cheers, -Damon

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  • John

    Is there a way to tell by the serial number if my new 2013 P5 has the 44.5 mm or the 46mm bottom bracket? I am trying to move my Rotor 3D cranks over and want to check if the 4624 bottom bracket is the right one.

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  • Damon Rinard, Cervélo Engineer

    Hi Chris, The Rotor bottom bracket you want is the W79mm variant. the number 79 refers to your Cervelo's frame width at the bottom bracket shell: BBright frames are 79mm across the BB shell. The other Rotor part, with the numerical indicator W68mm, is for non-Cervelo frames that have PresFit "BB30" (not BBright) bottom bracket shells. BB30 measures only 68mm across. Cheers, -Damon

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  • Damon Rinard, Cervélo Engineer

    Hi James, Very clear questions, thanks. 1) Yes, the frame should come with a BBright PressFit30 bottom bracket. 2) For your Shimano crank with SRM, use Rotor 4624 BBright bottom bracket (or Wheels Shimano adapters in BBright's 30mm bearings). Links to each are at the bottom of the article just above these comments. Cheers, -Damon

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  • CHRIS

    Hi Damon,I have a R3 2013 with 105 (size56),I want to upgrade to Durace.Just wondering what Rotor BB to use? Is it Press fit 4624 Road W 68mm or BBright 4624 W79mm I do not want to use adaptors or washers ,any advice greatly appreciated. Thanks Chris

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  • James

    Damon, I'm sorry , but i'm completely confused by the comments. I have 2 basic questions. 1) I've ordered a new R5 frameset. does this come with the BBright BB or do I need to order this separately.? 2) I'm fitting Shimano 9000 11 speed to the bike. The crank, will have a SRM power meter. Does this fit the BBright? Txs. James

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  • Philip

    Damon, thanks I appreciate the response. Tempted though I am to perform the install myself I'm leaving my bike in more capable/ and or authorized hands. However, If Cervelo ever decided to offer clinics using bikes that are no longer suitable for the retail market I'd pay the tuition and travel for the opportunity to get formal instruction. Perhaps even a certificate.... I use vacation time for an opportunity like that. Best! Robbins

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  • Damon Rinard, Cervélo Engineer

    Hi Philip, Yes, for sure you can install Rotor's new "Power" cranks on any BBright frame. They use the same axle system as Rotor 3D+ cranks: 30 mm diameter, and the axle is long enough to fit "all" bottom bracket standards. Rotor usually includes very good instructions, just follow them. :-) Cheers, -Damon Rinard, Cervelo Engineer

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  • Philip

    I hate to be the agony of ignorance provided all of the above data; however, I just want to confirm that I can install the "Rotor Power Crank Set" on my P5. To be certain, these cranks are the dual power Rotors, although they are not listed as the "Rotor 3D+ Power SRM". Feedback, please.

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