Rotor 11-39 12S With Shimano GRX RX820
05-15-24, 08:40 AM
#1
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Rotor 11-39 12S With Shimano GRX RX820
Morning!
I just purchased a Canyon Grizl AL 7. It has the 12 speed GRX groupset. My previous bike was the previous Gen Grizl AL 7 with the 11 speed groupset. I was using the Shimano 11S 11-40 cassette on that bike (2X setup 46-30 cranks) and I absolutely Loved my climbing gear with the 11-40 cassette. With the 12S on my new bike it comes with the 11-36 cassette and that’s just not quite enough for the steep gravel roads. I’m wondering if there is anyone here who has used the Rotor 11-39 12S cassette with a 2X Shimano GRX groupset. Or for that matter, any 12S cassette in the range of 11-38 to 11-40 with GRX groupset and Shimano HG Freehub.
Thanks!!
I just purchased a Canyon Grizl AL 7. It has the 12 speed GRX groupset. My previous bike was the previous Gen Grizl AL 7 with the 11 speed groupset. I was using the Shimano 11S 11-40 cassette on that bike (2X setup 46-30 cranks) and I absolutely Loved my climbing gear with the 11-40 cassette. With the 12S on my new bike it comes with the 11-36 cassette and that’s just not quite enough for the steep gravel roads. I’m wondering if there is anyone here who has used the Rotor 11-39 12S cassette with a 2X Shimano GRX groupset. Or for that matter, any 12S cassette in the range of 11-38 to 11-40 with GRX groupset and Shimano HG Freehub.
Thanks!!
05-15-24, 05:14 PM
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ignominious poltroon
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I think Canyon put on a 36T because that is the official max T spec for that derailleur, according to Shimano. Given everyone's experience with the 11-speed (which easily handles 40T with a turn of the B-screw), you should be fine. The range on their two 1X 12-speed rear derailleurs is significantly greater (lower), so at worst, you might have to avoid the big-big cross-chain position.
05-17-24, 12:45 AM
#3
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Hmm. I have the GRX 12 speed driveline on my bike, but the GRX system uses MTB gear spacing, meaning I needed to get a Micro Spline free hub for the 12 speed cassette.
06-03-24, 04:08 PM
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Some of the newer 2x12 GRX drivetrains use the HG Hub. I’m currently looking at a Cannondale Topstone with a 2x12, the cassette is a 11-34T.
06-03-24, 06:47 PM
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SHIMANO GRX 12-speed | SHIMANO BIKE-US
