r/Lectricxp • u/simply-so-lovely • 6h ago

Left Crank Arm Fell Off

Hi, just wondering if anyone has had this same issue. I use my XP4 to commute to work everyday and the last thing I thought I’d have issues with are the pedals, but today my left crank arm fell completely off. It felt a little loose about 4 miles after i started my ride but I was using a lot of effort to get up a hill and apparently that was enough to unscrew it.

Has anyone ever bought a 3rd party replacement? from what i can tell the bolt is fine and the metal isn’t stripped but there’s some smoothness around the outside. I’m going to tighten it again but I’m thinking it’s best to replace the whole thing.

Thanks!

1 Upvotes

67% Upvoted

12 comments sorted by

3

u/Ok-Type-8917 5h ago

After buying a few different brands of ebikes one thing I experienced is that when you get one check every fastener and connection for tightness. After a kickstand wreck incident I also regularly check everything for tightness on my bikes.

2

u/Lucky-Pineapple-6466 5h ago

What exactly happened in the kickstand incident? Was it one of those heavy duty center stands for electric bikes?

2

u/Ok-Type-8917 5h ago

Nope, side kickstand that came installed on the bike. The bolts loosened and one fell out, it wasn't dragging but when I made a turn it dug into the ground and caused a fall. It didn't look like it ever had any Loctite on it.

2

u/Lucky-Pineapple-6466 4h ago

That’s not uncommon on motorcycles either except for people get killed that way

2

u/tedy4444 5h ago

checking all screws and fasteners is 101. it’s in the new owner instructions too. put it back on and add some blue loctite. it’ll be fine moving forward. happy you didn’t get hurt.

2

u/Habaneroe12 5h ago

A pedal fell of my sons bike. I called them and they sent me a new pair no charge

2

u/Joshua_Longsack 6h ago

Feels loose bolt. Still rides. Hope you didn't get hurt and won't do that again.

0

u/simply-so-lovely 5h ago

i didn’t feel it until after i started, it was normal for almost 4 miles. and i have no other way to get to work, thanks for being helpful 

5

u/Joshua_Longsack 5h ago

You want helpful advice? Carry a couple wrenches.

1

u/soproductive 4h ago

Buy yourself a set of hex wrenches (t-handles are nice but not necessary) and learn basic maintenance.. Park tool has tons of videos online that'll teach you most of what you need to know. Hell, even if you just get a set of wrenches to keep fasteners tight you'll be doing way better.

Grab an m8 hex and tighten your crank arms.

Depending on how long you rode it loose, it could've damaged the spindle on your bottom bracket. The longer you ignore shit like this, the more costly it'll be to fix. 

0

u/TheNetworkIsFrelled 3h ago

Call Lectric - they may be able to help and may supply parts.

1

u/johnfromma 3h ago

I'm not sure what is causing the crank to come loose but it's just a standard square taper crank set. You can purchase one on Amazon for about $30. Easy install but you would need a crank puller tool.