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Question about shimano crankset change on Madone

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Question about shimano crankset change on Madone

Old 10-05-14, 10:31 PM
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Dorian7
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Question about shimano crankset change on Madone

Hello All,

I am changing my crankset in my madone 4.5 and while I am at it I opted to go from the no name shimano crank to an ultegra. Still compact tho. I am wondering if this is a direct replacement or will I need any additional parts?
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Old 10-05-14, 10:42 PM
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It depends on which bottom bracket system the no-name crank uses.
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Old 10-05-14, 10:49 PM
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Originally Posted by Dorian7 View Post
Hello All,

I am changing my crankset in my madone 4.5 and while I am at it I opted to go from the no name shimano crank to an ultegra. Still compact tho. I am wondering if this is a direct replacement or will I need any additional parts?
The Trek listing says it's a "Shimano R565, 50/34 (compact)". I think an Ultegra will bolt on in place of the original crank with no issues.
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Old 10-07-14, 03:40 AM
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I pulled the same crank off my 10 speed Madone and replaced it with an Ultegra 6800 crank
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Old 10-07-14, 03:42 AM
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I pulled the same crank off my 10 speed Madone and replaced it with an Ultegra 6800 crank
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Old 10-07-14, 06:56 AM
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Isn't the 6800 11 speed ? I thought the 11 speed chain was different.
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Old 10-07-14, 07:22 AM
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Originally Posted by spdracr39 View Post
Isn't the 6800 11 speed ? I thought the 11 speed chain was different.
Yes, but the FC-6800 isn't exclusively for 11sp chains.
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Old 10-07-14, 07:55 AM
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Originally Posted by Dorian7 View Post
Hello All,

I am changing my crankset in my madone 4.5 and while I am at it I opted to go from the no name shimano crank to an ultegra. Still compact tho. I am wondering if this is a direct replacement or will I need any additional parts?
I just replaced my R565 with a 5750 105 compact crank on my 2013 Madone 4.5. Changed the BB90 bearings also. No problems. Works like a champ.
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Old 10-10-14, 11:15 AM
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The R565 is essentially a 105-grade crankset (maybe closer to Tiagra today, but 105 a couple years ago), and if I were upgrading I would definitely go to the FC-6800 as others have done to consider it a partial upgrade along the way to a future 11-speed setup. Bearings should match up perfectly so there should be no issues. Just make sure you re-use any spacers or bearing covers the same way as what you take off.

Also, assuming it's the BB90 bottom (forgot if you mentioned what year Madone 4.5), put the drive side bearing onto the crank first, not into the frame first. The final inch or so onto the crank tube is likely to be tight, and you don't want to put the pressure of getting those together onto the frame itself.

I'm intrigued if anyone has weighed the R565 against a labeled 105 crankset. I bought a "new" R700 crankset (apparently Ultegra comparable) when I changed a R553 triple to double and also needed to move to shorter crank arms, and you could definitely tell the difference in weight. The non-named Shimano R-series are pretty good, just not as pretty and definitely not as expensive as the named-series equivalents.

Last edited by JamesInSJ; 10-10-14 at 11:19 AM.
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Old 07-07-17, 02:15 PM
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Mull

Originally Posted by desertdork View Post
Yes, but the FC-6800 isn't exclusively for 11sp chains.
Shimano 50-f crank on my trek madone 4.5 2013, looking to upgrade to ultegra 6800 or 6750 what would you recommend?
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