Shimano Ultegra GS

jdee84
jdee84 Posts: 291
edited September 2019 in Workshop
I have ordered a new bike which comes with the above rear mech and an 11-34 cassette.

Would that rear mech be suitable for a cassette with a largest cog of 28 or 30? Or would I need to change to the short cage mech?

Comments

  • poptart242
    poptart242 Posts: 531
    I'm using a GS with a 28 cassette, no issues. Just make sure your b screw is wound in to the right spot.
  • jdee84
    jdee84 Posts: 291
    Poptart242 wrote:
    I'm using a GS with a 28 cassette, no issues. Just make sure your b screw is wound in to the right spot.

    Thanks!
  • StillGoing
    StillGoing Posts: 5,211
    You don't need to do anything with the B screw. The GS is designed to take cassettes up to 32 teeth, so will cope with your 28 with no problem. I run 52/36 with either a 28/11 or 32/11 depending on the terrain and how my legs are feeling. I don't have do any adjustments to the B screw.
    I ride a bike. Doesn't make me green or a tree hugger. I drive a car too.
  • N0bodyOfTheGoat
    N0bodyOfTheGoat Posts: 6,063
    28T is the official starting point for the largest sprocket on the Shimano GS mechs from 5800+.
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  • johnmiosh
    johnmiosh Posts: 211
    I have 6700 which handles 11x32 and 50x36 with no problem, but 6600 doesnt like it.

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