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Can I install a 6800 Crank on this frame?

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Can I install a 6800 Crank on this frame?

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Old 05-16-18, 11:20 AM
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MattyMurdah
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Can I install a 6800 Crank on this frame?

Hey all! I have a 2018 Fuji Cross 1.7 purchased from Performance Bike last year that has a "Praxis Conversion" bottom bracket - Fuji's website does not state what type of BB shell is on the actual frame itself and I'm having a hell of a time trying to figure out if it is possible to install a Shimano Ultegra 6800 crankset on the bike (moving over from another bike). Currently, it's running the stock Oval cranks.

Looking at Praxis' website, there are several types of conversion BBs available, but I can't find any information on what type of BB's the Oval cranks plug into and I'll apparently need special tools to get the damn Praxis BB out of the frame so I can't visually inspect that on my own.

Help me skip a trip to the bike shop! Thanks in advance for any suggestions.

Link to the bike: Fuji Bikes | Cross 1.7

EDIT: After re-reading the Praxisworks info on their website, it looks like every one of the BB's is a conversion solution for BB30/PF30 to GXP, hollowtech, etc so I guess I can safely assume the Fuji has a BB30 shell? I will remove the cranks when I get home and measure to see if the Oval cranks are built for GXP or Shimano and report back!

Last edited by MattyMurdah; 05-16-18 at 11:32 AM. Reason: New info
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Old 05-16-18, 12:15 PM
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Iride01
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Just measure the width of the shell and inside diameter in millimeters. That'll tell you the most. But if there are any numbers or markings visible on the Praxis, that should give you some info too without taking it apart.

You should be able to find a BB that will work an Ultegra crank. Shimano makes them in all sizes and flavors for it's hollowtech II cranks.

PS.... Fuji's site does say in the frame description part of the specs that it is a PF30 shell. Fuji Bikes | Cross 1.7

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Old 05-16-18, 02:14 PM
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MattyMurdah
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Originally Posted by Iride01 View Post
Just measure the width of the shell and inside diameter in millimeters. That'll tell you the most. But if there are any numbers or markings visible on the Praxis, that should give you some info too without taking it apart.

You should be able to find a BB that will work an Ultegra crank. Shimano makes them in all sizes and flavors for it's hollowtech II cranks.

PS.... Fuji's site does say in the frame description part of the specs that it is a PF30 shell. Fuji Bikes Cross 1.7
Thank you for pointing this out!
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