Join Date: Jul 2006
Location: Columbus, OH
Bikes: '08 Surly Cross-Check, 2011 Redline Conquest Pro, 2012 Spesh FSR Comp EVO, 2015 Trek Domane 6.2 disc
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Check out the top and bottom gearing, because all the stuff in between can be duplicated.
At a modest 90rpm cadence, the 50/11 gearing puts you at 32.6mph while the 52/12 drops you to 31mph. A negligible difference.
At the same cadence, 30/26 is 8.3mph and 30/28 gives you 7.7mph. It's only a 2.2 gear inch difference, which you would barely notice.
If you're going to change gearing on the bike, allow me to make a suggestion which would give you a similar gearing range while eliminating some maintenance hassle and component weight:
A 50/34 compact double up front, and an 11 - 32 cassette and mtn rear derailleur. I run a similar combo (48/34 compact, 11-32 cass.) on my brevet bike and it has been awesome for every climbing situation I've found myself in.
"I feel like my world was classier before I found cyclocross."
- Mandi M.