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-   -   Shimano Ultegra 6800 Cransket Question (https://www.bikeforums.net/road-cycling/1087293-shimano-ultegra-6800-cransket-question.html)

cycledude61 11-07-16 06:00 PM

Shimano Ultegra 6800 Cransket Question
 
I currently have a Shimano Ultegra 6800 (11 Speed) group set on a Giant carbon frame with a press fit bottom bracket. I am moving the components to a Lynskey R265 frame with a threaded, 68mm bottom bracket. A mechanic at a LBS said that I would have to purchase a new crankset because the current one will not work. He said the spindle is a different size. When I purchased the 11 speed group set to replace the original 10 speed group set, I don't remember having to specify what type of bottom bracket I would be using. Also, I have researched online and can't find where I can buy a crankset specifically for a press fit bottom bracket.

Was I misinformed by the LBS mechanic? Any insight and enlightenment would be greatly appreciated.

Thanks.

Dean V 11-07-16 06:09 PM

Yes, the LBS is wrong. Cranks will fit. Just need the appropriate BB bearings.

cycledude61 11-07-16 06:39 PM

Bearings
 
Thanks for the input. If I purchase the threaded bottom bracket, don't the bearings come with it?

SSRI 11-07-16 07:08 PM

you will need a bottom bracket adapter if you are to use a 24mm crankset on a bb30 frame.
there are multiple options

https://www.praxiscycles.com/conversion-bb/

FSA Press-In Adaptor For BB30 > Components > Drivetrain > Conversion Kits & Parts | Jenson USA

BB30 Adapter for 24mm Spindle Cranks (Shimano, FSA, etc.)

if you already have bearings install on the new frame

You might want to go to a different shop...

sorry, since you are moving to a threaded BSA frame, all you need is a standard shimano outboard bearing BB.

You really need to go to a different shop.

smarkinson 11-07-16 07:17 PM

Mechanic knows nothing. Just get a standard Shimano threaded BB for Hollowtech II. Something like the BB-R60. Screw the cups into the frame (you may need to get the appropriate tool) and stick the cranks on. The bearings are in the cups, I don't think they are replaceable but as the BB costs peanuts anyway why would they need to be?

I've done this myself taking 6700 cranks off a Giant carbon and put them onto an older aluminium frame with a standard 68mm threaded BB. I replaced the cranks on the giant with an 11 speed 105, no problems with compatibility.

Xherion 11-07-16 07:29 PM

All you need is a Hollowtech 2 BSA bottom bracket. The bearings are in the bottom bracket.

Nashbar - Welcome!

mcours2006 11-07-16 07:39 PM

Curious how a paid mechanic wouldn't know this. Even a layperson like myself knew this.

Yeah, time to find another shop.

cycledude61 11-07-16 08:00 PM

Thanks all.
 
Yes, I was a bit confused. Everything I had read seemed to suggest that cranks were specific to the type of bottom bracket.

I have ridden for years (decades actually), but just in the past three or so have become more interested in working on my own bike, other than routine maintenance. This will be my first "build." I was willing to pay a LBS mechanic good money ($200) for his time to walk me through the process, but none seem too willing. I would have about third of the work done before even needing their assistance.

Anyway, thanks for the advice.

Xherion 11-07-16 08:09 PM

You can easily do the work yourself. Installing a Shimano Hollow Tech 2 crank into a threaded bottom bracket is one of the easiest things you can do. It will literally take like 5 minutes to do, even with no experience.

All you need to do is use a preload cap removal tool to remove the cap on the left crank arm, then a hex wrench to remove the pinch bolts on the left crank arm. Take a mallet and tap the spindle and right crank/chainring out.

To install the new threaded bottom bracket, you just need the spline tool to tighten the bottom bracket cups. To install the crank into the BB, it's basically the same thing as removal, just in reverse.

This tool, plus the bottom bracket is all you need.

https://www.amazon.com/Park-Tool-Bot.../dp/B009W68CCQ

cycledude61 11-07-16 08:45 PM


Originally Posted by Xherion (Post 19176426)
You can easily do the work yourself. Installing a Shimano Hollow Tech 2 crank into a threaded bottom bracket is one of the easiest things you can do. It will literally take like 5 minutes to do, even with no experience.

All you need to do is use a preload cap removal tool to remove the cap on the left crank arm, then a hex wrench to remove the pinch bolts on the left crank arm. Take a mallet and tap the spindle and right crank/chainring out.

To install the new threaded bottom bracket, you just need the spline tool to tighten the bottom bracket cups. To install the crank into the BB, it's basically the same thing as removal, just in reverse.

This tool, plus the bottom bracket is all you need.

https://www.amazon.com/Park-Tool-Bot.../dp/B009W68CCQ

Yes, I was planning on installing the bottom bracket and crank. As mentioned, I ask the LBS a few questions and received a misinformed response.


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