Help, dust cap, sprocket disaster.

Barfly

Barfly

New Member
A couple weeks ago I purchased a new rear wheel.
When I remounted the sprocket I noticed the dust cap was beveled on the edges, and had no true edge to hold the sprocket in place.

So, I thought I would attempt it anyways.
I centered the sprocket, and slowly tightened the bolts in a circular pattern, all the while taking measurement to make sure it was going to center.

I thought it worked, ran great for a couple weeks, the chain clearance on the tire was so small that I knew it was definitely centered.

Then a couple days ago I was starting my bike to pull out of a parking lot.
The chain came off and got all messed up wrapping around the sprocket.
The sprocket was now way off center, and I am lucky this happened when I was going slow.

What I need to know is, how do I fix this dust cap problem?
I have one for my old rear wheel that centers, but it is not wide enough to fully cover the new wheel.
I have thought of maybe gorilla glueing it on the new one,
How to insure it is truly centered during glueing would still be a question.

Also my chain has a couple links that are definitely toast, maybe more, some of it is salvageable.
Anyone know the size of these chains, and the easiest/cheapest way at fixing?

Wow, that is a long post, hope it makes sense.
Any help would be greatly appreciated
 
Got the chain off and that is done for.
Thinking of trying to find some of the #41 tractor chain that seems to be an upgrade over the bike chains.....anybody here tried this?
 
Yes and I highly recommend using #41 chain.

The MOST important thing to think about when installing your sprocket, if it doesn't clear the dust cap odds are it's not going to clear the bearing race on the hub and if it doesn't clear the race you're putting a lot of extra stress on the hub.

Tractor Supply has #41 chain, it's right around $16 for 12'.
 
If thats $16 for a foot, your over payin. I just replaced mine and it cost me $25 for 5 feet of #41 with a master link. BIt was well worth it, well made and looks bad ass
 
Kevlarr said:
Yes and I highly recommend using #41 chain.

The MOST important thing to think about when installing your sprocket, if it doesn't clear the dust cap odds are it's not going to clear the bearing race on the hub and if it doesn't clear the race you're putting a lot of extra stress on the hub.
Click to expand...

So, with a wide hub on this new wheel I bought,
I have to machine the inside of the sprocket and make it wider?
 
Depends, set the sprocket on the wheel without any of the rag joints, does it fit over the hub and sit right against the spoke flange?

If yes then you're set, if no you're going to have to enlarge the hole until it does because even though it looks ok with the rag joints in once you get everything tight the sprocket is going to be right up against the flange.
 
Derks420 said:
If thats $16 for a foot, your over payin. I just replaced mine and it cost me $25 for 5 feet of #41 with a master link. BIt was well worth it, well made and looks bad ass
Click to expand...

Looks like you are the one who got ripped off.. the TSC chain is about 15 dollars for 12 FEET.
 
Barfly said:
A couple weeks ago I purchased a new rear wheel.
When I remounted the sprocket I noticed the dust cap was beveled on the edges, and had no true edge to hold the sprocket in place.

So, I thought I would attempt it anyways.
I centered the sprocket, and slowly tightened the bolts in a circular pattern, all the while taking measurement to make sure it was going to center.

I thought it worked, ran great for a couple weeks, the chain clearance on the tire was so small that I knew it was definitely centered.

Then a couple days ago I was starting my bike to pull out of a parking lot.
The chain came off and got all messed up wrapping around the sprocket.
The sprocket was now way off center, and I am lucky this happened when I was going slow.

What I need to know is, how do I fix this dust cap problem?
I have one for my old rear wheel that centers, but it is not wide enough to fully cover the new wheel.
I have thought of maybe gorilla glueing it on the new one,
How to insure it is truly centered during glueing would still be a question.

Also my chain has a couple links that are definitely toast, maybe more, some of it is salvageable.
Anyone know the size of these chains, and the easiest/cheapest way at fixing?

Wow, that is a long post, hope it makes sense.
Any help would be greatly appreciated
Click to expand...



it may not be a good idea but I stuff fiberglass beteewn the ruber pads after I center the sprocket with out tigthen it all the way. then tightern it more after the fiber glass harder. The sprocket will never move again .but as long as i don't need a new wheel I am OK
 
Just to be clear to people mounting sprockets on coaster brake wheels with dust caps... The sprocket CANNOT TOUCH THE DUST CAP!! The dust cap does not spin with the wheel. If the sprocket touches the dust cap?, you must trim the edge of the cap off to clear the sprocket.

Also, the best way I have found to center the sprocket is to spin the wheel & watch the tips of the teeth as the sprocket spins, & then adjust it before (& during) tightening of the bolts.
 
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