Rad mini Chain rubbing rear tire.

Rad Mini Jeremy

New Member
Hi all

I’ve just noticed that when I’m in the lowest gear on my mini the bottom part of the chain is rubbing against the rear tire. The derailer looks awfully close to the rim as well. I just got the bike in December and not sure if it was always like this or if it got hit causing this problem.

Anyone experience anything like this before. I’m a little hesitant to adjust the derailer on my own and was thinking of calling Velofix for a tuneup.
What are your thoughts?
Thanks
 

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trainman

Active Member
I own two Rad Mini's and our rear chain clears the tire by about 1/8" maybe a little more. I would think this could be corrected by adjusting the derailer as it could be adjusted a little to far to the other side. It never hurts to have someone check this and why they are at it check the spokes for proper tightness. I would probably first adjust the stop screew for that side of the derailer and see if you don't get any clicking all should be ok, it's worth a try.
 

rich c

Well-Known Member
Is the tire centered in the chain stays? If a nut loosened, the tire may be twisted on the bike.
 

Radycle

New Member
Either you derailleur or your derailleur holder is bent. If you are not comfortable diagnosing and fixing this, you should take it to a bike mechanic or shop for repair.
 

Timpo

Well-Known Member
Your derailer is bent, just grab it and bend it back until its straight.
If it was the derailleur, would it be the same though?

I found it extremely hard to bend the metal back and make it completely straight.

Also, even he did, I think the strength / rigidity will be compromised.
 

ElevenAD

Active Member
If it was the derailleur, would it be the same though?

I found it extremely hard to bend the metal back and make it completely straight.

Also, even he did, I think the strength / rigidity will be compromised.
Its best to take it to a bike shop, I'm just shocked your chain doesn't jump behind the lowest gear with that derailleur pushed so far in, if the bikes still under warranty rad should send you a new one if this can't be adjusted.
 

Timpo

Well-Known Member
Its best to take it to a bike shop, I'm just shocked your chain doesn't jump behind the lowest gear with that derailleur pushed so far in, if the bikes still under warranty rad should send you a new one if this can't be adjusted.
I think the warranty is only for manufacture's defect, if he bent it, I don't know if it would cover..
 

mrgold35

Well-Known Member
I have two 2016 radrovers and one derailleur was bent and the chain was rubbing the tire on arrival. Rad just told me to bend it back into place and it has stayed put for +3700 miles.
 

awestover89

New Member
Not trying to steal the thread, but this looks really similar to my bike that was delivered today.
20200515_184932.jpg


Not the best picture, but the dangling part is kind of curved inward towards the spokes. I think that's the derailleur?

20200515_185004.jpg


This one it's out of focus, but was trying to show how the bottom of the chain is out of line (closer to the tire) than the top chain. The chain is pretty much touching the tire directly. I went to my preferred LBS but they can't work on e-bikes, and the one they recommended I go to for e-bike work is only doing repairs Monday through Thursday due to Covid-19. If these pictures are good enough, could somebody confirm if this is in fact a bent derailleur?
 

ElevenAD

Active Member
I have two 2016 radrovers and one derailleur was bent and the chain was rubbing the tire on arrival. Rad just told me to bend it back into place and it has stayed put for +3700 miles.
My Biktrix came with a deraileure bent from shipping, I also just grabbed it and bent it back,end of problem. still I think rads CS has improved since 2016 maybe they will send him a new one, worst that could happen is they say no
 

Timpo

Well-Known Member
Not trying to steal the thread, but this looks really similar to my bike that was delivered today.
View attachment 52526

Not the best picture, but the dangling part is kind of curved inward towards the spokes. I think that's the derailleur?

View attachment 52527

This one it's out of focus, but was trying to show how the bottom of the chain is out of line (closer to the tire) than the top chain. The chain is pretty much touching the tire directly. I went to my preferred LBS but they can't work on e-bikes, and the one they recommended I go to for e-bike work is only doing repairs Monday through Thursday due to Covid-19. If these pictures are good enough, could somebody confirm if this is in fact a bent derailleur?
I don't think that's the "dangling part" you're talking about.
That looks straight to me, also the dangling part is completely 90 degree angle compare to the attachment.

That looks like derailleur hanger...
Because the whole derailleur looks angled, not just the dangling part.

This piece on your derailleur, is it straight?
If you hit something, it will bend. Perhaps it was bent during shipping?
MEC Urban Bikes Derailleur Hanger Model Year to 2018
 

awestover89

New Member
That looks like derailleur hanger...

This piece on your derailleur, is it straight?
If you hit something, it will bend. Perhaps it was bent during shipping?
MEC Urban Bikes Derailleur Hanger Model Year to 2018
Yeah, that part is definitely not straight. I ended up just taking it into an LBS this morning to let them take a look and straighten it if they can. They've got a bit of a backlog due to more people biking during lockdown.
 

Timpo

Well-Known Member
Yeah, that part is definitely not straight. I ended up just taking it into an LBS this morning to let them take a look and straighten it if they can. They've got a bit of a backlog due to more people biking during lockdown.
I bent my derailleur hanger before, it was impossible to bend it back completely straight.

Needless to say, I just replaced it with new one :confused:

Your LBS might have some special tool, but I was told that once it's bent, any metal will lose its integrity / rigidity, meaning it will be much easier to bend next time.
 

harryS

Well-Known Member
First ebike, I forgot to bring my hitch carrier, so we took off the front wheel and laid it on its side in the back of the wagon for a 200 mile drive home. Laid it on the wrong side, and it bent the derailleur on the bumps coming home.

Took out my 12" crescent wrench and bent it straight again. Of course, I had a couple of old bikes to look at for role models.