Replacement left Crank arm for Tacx neo bike

I had a problem with my left crank arm on the bike. It was always loose, even when tightened, where it fits on the right crank, it got loose and is spinning wrong. I need to buy a new crank arm, where can I buy one?

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Garmin-Maeve 8 months ago +3 verified

if you are experiencing looseness in the crank arm on your NEO Bike, please contact Garmin product support in your locale at support.garmin.com
Sven1294 8 months ago in reply to bjergkongen1 +1

Sorry for the delayed answer but I just got around to looking at this. It is the same spline as the Shimano LH crank arm, BUT the plastic housing of the bike interferes with the inside of the Shimano arm…

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0 runabilly 11 months ago

I’ve got the same problem

we're machines

0 Sven1294 11 months ago

I don't have a direct answer, but I will be pulling mine off to replace the BB bearings in a couple of days. I have a spare Shimano LH crank arm that I will check to see if it fits. It might be too wide and Tacx probably made a unique spline, but it's worth a check since I will have it apart anyway.

0 3296715 11 months ago

Same problem on mine. Asked about the thunk in the crank travel and was told “the engineers want it, ship back your bike”. Okay…

0 5628255 11 months ago

Assume you loosened the pinch bolt and then tightened the preload bolt before tightening the pinch bolt again? Have you tried degreasing the interface and tightening it up again?

0 Golf_VR6 10 months ago

Maybe this helps you with the loose left crank-arm: https://www.youtube.com/watch?v=jmwDTjJR3V0

0 bjergkongen1 10 months ago in reply to Sven1294

Hello Sven1294

did the shimano crankarm fit the neobike

0 Sven1294 8 months ago in reply to bjergkongen1

Sorry for the delayed answer but I just got around to looking at this. It is the same spline as the Shimano LH crank arm, BUT the plastic housing of the bike interferes with the inside of the Shimano arm and rubs. If you are willing to remove the plastic cover or cut the plastic away around the spindle then I think it would work. I chose not to do that and will continue to use the Neo's LH arm for now.

0 bjergkongen1 8 months ago in reply to Sven1294

Thanks Sven

+1 Garmin-Maeve 8 months ago

if you are experiencing looseness in the crank arm on your NEO Bike, please contact Garmin product support in your locale at support.garmin.com

0 5153084 8 months ago in reply to Sven1294

This is interesting I had left crank leave the party , splines are fine I'm waiting for a kit . It got me thinking about left crank options , left power meter crank would be nice .

It's good to know the splines work so if I have future issues I stand a chance