Technical FAQ: Putting a Shimano 105 compact crank on a Dura-Ace bike

  • By Lennard Zinn
  • Published Aug. 11, 2009
  • Updated Nov. 12, 2009 at 11:25 AM EDT

Dear Lennard,

I am planning to travel to Europe to do some traveling, cycling, and catch a bit of the tour. I am big guy, and struggle going uphill. At home I ride a Devinci Leo with full Dura-Ace 7800, 53×39, with a 12-27, which is OK for Northern Ontario.

Is there a way to economically put a 105 compact crankset on my bike to help in the hills of Europe? Or should I bring my winter bike with a triple and 105 / Sora mix? I would really prefer to ride my good bike as it is lighter, more comfortable and more reliable, but I really am not interested in walking up the hills. No matter what bike setup I choose, I know the high passes are not for me.

Dear Guy,

You can just slap a 105 compact crank right into your existing bottom bracket; there is no reason to change anything other than the height and cable tension of the front derailleur.


FILED UNDER: Bikes and Tech / Technical FAQ TAGS: / / / / / /

Lennard Zinn

Lennard Zinn

Our longtime technical writer joined VeloNews in 1987. He is also a framebuilder, a former U.S. National Team rider, and author of many bicycle books, including Zinn and the Art of Mountain Bike Maintenance and Zinn and the Art of Road Bike Maintenance, as well as Zinn and the Art of Triathlon Bikes and Zinn's Cycling Primer: Maintenance Tips and Skill Building for Cyclists. He holds a Bachelor’s degree in physics from Colorado College. Readers can send brief technical questions to Ask LZ.

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