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Old 08-29-14, 11:20 PM
Join Date: Jun 2005
Location: Delaware
Posts: 1,394

Bikes: Yes, I have bikes.

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I've decided to replace the cranks on my 2004 520. I'd be going from a 105 crankset that's 52-39-28 (the small ring was replaced) to either the Deore M590 at 48-36-26 or the Deore XT M770 at either 48-36-26 or 44-32-22. Everything is 9 speed.

The M590 is standard on current 520s. Are those of you who ride with the 590's satisfied or would you recommend an upgrade to the 770? There's a slight weight difference and supposedly the 770 is a bit stiffer. I believe that the 770 comes with a tad better bottom bracket too. The price difference is +/- $100.00.

Also is the 3.2 gear inch difference in the 26 v. 22 small ring minor or significant? BTW...I'm not a fan of hills.

You opinions please.
Thank you.
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