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Old 01-27-17, 10:26 AM
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Barrettscv 
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Join Date: Feb 2006
Location: Lake Geneva, WI
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Bikes: Ridley Helium SLX, Canyon Endurance SL, De Rosa Professional, Eddy Merckx Corsa Extra, Schwinn Paramount (1 painted, 1 chrome), Peugeot PX10, Serotta Nova X, Simoncini Cyclocross Special, Raleigh Roker, Pedal Force CG2 and CX2

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Combining two 11-speed Shimano cassettes

I have an 11-32 11-speed 105 5800 cassette on a gravel bike and would rather have a 12-13-14-15-16-18-20-22-25-28-32 than the 11-12-13-14-16-18-20-22-25-28-32 that I have now. It looks like all I need to do is buy a 12-25 5800 and combine cogs.

The red cogs would come from the 12-25 and the black cogs would come from the 11-32: 12-13-14-15-16-18-20-22-25-28-32. Is it really that easy?

I've reviewed the Shimano Dealer pdf, see: [PDF]Cassette Sprocket (11-speed) - SHIMANO Dealer's Manual / User's ...
si.shimano.com/php/download.php?file=pdf/dm/DM-CS0004-02-ENG.pdf
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