# How best to adjust gears with bike in Kickr Core?

**URL:** <https://www.trainerroad.com/forum/t/how-best-to-adjust-gears-with-bike-in-kickr-core/23555>\
**Category:** Equipment\
**Tags:** bike, trainer\
**Created:** [November 5, 2019, 2:59pm UTC](https://www.trainerroad.com/forum/t/how-best-to-adjust-gears-with-bike-in-kickr-core/23555 "2019-11-05T14:59:01Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Kekscast](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/kekscast/32/7721_2.png) [@Kekscast](https://www.trainerroad.com/forum/u/Kekscast)\
**Post date:** [November 5, 2019, 2:59pm UTC](https://www.trainerroad.com/forum/t/how-best-to-adjust-gears-with-bike-in-kickr-core/23555/1 "2019-11-05T14:59:01Z")

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Hey guys,

All the gears on my bike work fine on the kickr core, but the chain rattles quite loud - in some gears louder than in others.

I’m wondering if this might have to do with the adjustment of the rear derailleur?

I tried to tinker around with it a bit - but when I’m not running any software it just seems super hard to get the pedals moving with my hands so I can adjust the gears.

Do you have any tips for me here?

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**Author:** ![thebigbadox](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/thebigbadox/32/3782_2.png) [@thebigbadox](https://www.trainerroad.com/forum/u/thebigbadox)\
**Post date:** [November 5, 2019, 3:03pm UTC](https://www.trainerroad.com/forum/t/how-best-to-adjust-gears-with-bike-in-kickr-core/23555/2 "2019-11-05T15:03:24Z")

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Use the Wahoo phone app, start a workout, and set the Kickr resistance or erg to 0. Not near mine, but that should work just fine. Other option if that doesn’t work, put it in a gear where you get the chain rattle and adjust the alignment until the cog and jockey wheel are flush.

Using TR I typically just keep mine in the middle of the cassette and in the small ring and just make sure that combo produces minimal noise and not worry past that.

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**Author:** ![jarsson](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jarsson/32/69117_2.png) [@jarsson](https://www.trainerroad.com/forum/u/jarsson)\
**Post date:** [November 5, 2019, 6:28pm UTC](https://www.trainerroad.com/forum/t/how-best-to-adjust-gears-with-bike-in-kickr-core/23555/3 "2019-11-05T18:28:40Z")

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I have different cassette on my Core than on my wheel (11-28T vs 11-30T) and all I do is regulating the barrel for gear indexing. I know how many turns I have to make an then everything works silently. So probably indexing your gears should make the job.

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**Author:** ![STP](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/stp/32/15688_2.png) [@STP](https://www.trainerroad.com/forum/u/STP)\
**Post date:** [November 6, 2019, 4:25pm UTC](https://www.trainerroad.com/forum/t/how-best-to-adjust-gears-with-bike-in-kickr-core/23555/4 "2019-11-06T16:25:04Z")

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I have a Core and i find its rather difficult to get the bike onto the Core perfectly. But when I do, the gears work just fine. Before you start readjusting, make double sure the drop outs are on the trainer straight. With a wheel, I can lift the bike up by the rear wheel which gets the dropouts perfectly placed but that option is not really there with a trainer. Not sure what the best way is but I lift the front of the bike and push down and forward on the back.