# Correcting a pedaling 'knock'

**URL:** <https://www.trainerroad.com/forum/t/correcting-a-pedaling-knock/19244>\
**Category:** Training\
**Created:** [August 6, 2019, 6:47am UTC](https://www.trainerroad.com/forum/t/correcting-a-pedaling-knock/19244 "2019-08-06T06:47:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![timothyh](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/timothyh/32/1133_2.png) [@timothyh](https://www.trainerroad.com/forum/u/timothyh)\
**Post date:** [August 6, 2019, 6:47am UTC](https://www.trainerroad.com/forum/t/correcting-a-pedaling-knock/19244/1 "2019-08-06T06:47:47Z")

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During the cooldown after my last race, I realised I had a really bad knock. My bike would jerk forward under me. I’ve experienced a similar thing at the end of the a TR session on the rollers, but it was very pronounced this time.

I couldn’t pinpoint exactly where in the pedal stroke it occurs, but it was definitely one side only.  
Has anyone had an success troubleshooting this kind of problem before? I’m guessing I have a muscle imbalance, but don’t where to start.

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**Author:** ![Smurf](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/smurf/32/16911_2.png) [@Smurf](https://www.trainerroad.com/forum/u/Smurf)\
**Post date:** [August 6, 2019, 9:06am UTC](https://www.trainerroad.com/forum/t/correcting-a-pedaling-knock/19244/2 "2019-08-06T09:06:21Z")

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Bottom bracket?  
Stuck chain link?

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**Author:** ![timothyh](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/timothyh/32/1133_2.png) [@timothyh](https://www.trainerroad.com/forum/u/timothyh)\
**Post date:** [August 6, 2019, 9:46am UTC](https://www.trainerroad.com/forum/t/correcting-a-pedaling-knock/19244/3 "2019-08-06T09:46:38Z")

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Unfortunately not. My previous experience of knock on rollers was on another bike. I can’t blame the bike here…