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Wilma397

I need help! chain catching rim!

10 posts in this topic

ok guys i need some help. My back wheel went in for a new tyre a couple of weeks ago and when i put the wheel back on the bike the chain started to catch the rim of the wheel. The tyre is identical to one it replaced and the chain never caught the rim before so i can't work out why it is now? The wheels are set up straight and i even tried adjusting the wheel at an angle in favour of the chain to try and get a bigger gap between the chain and the rim but it was still catching the rim. Now i know i should have stopped riding the bike and got the problem sorted as soon as as it started to happen but the bike is just so much fun i couldn't resist a ride when the sun came out :bonk: But now its gotten to a point where i am not willing to do anymore damage to the wheel so i need to get this sorted. The only thing i can think of is to get a new chain and sprockets? I've tried taking the wheel of and switching the spacers around but nothings worked?? Anyway heres a link to some pictures of the damage

http://www.bikepics.com/members/wilma397/04wr450f/

Any help would be greatly appreciated, thanks alot :lame:

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I used to trash chains and spockets with my sm setup , until I got a graves chain block . I'm sure you could make it fit your bike. It's just a piece of milled super hard wearing plastic , or you could make your own . I also made custom spacers to get the chain as far away for the tire as I could.

http://www.gravesport.com/cgi-bin/shopper?preadd=action&key=SGY_06YZ-K

this is a pic of my rear tire with all the spacers made and moded , but without the chain block

DSC00958.jpg

another view.

DSC00946.jpg

with the block.

DSC00992.jpg

you can see it still touchs just a bit but this tire has been on there for near 1000 miles.

another pic

DSC00994.jpg

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Did you do the tire change? If "no" maybe the mechanic took your rear sprocket off to get more leverage on the old tire (so he/she would not cut their hand up) and when he/she put the sprocket back on they overtightened one side of the sprocket which made the other side uneven which could cause the chain to ride unevenly.

If that is too far fetched....maybe it's just time for a new sprocket and chain.

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No i did the wheel change myself but i think your right it probobaly is time for new chain and sprockets. And also thanks for that link to the chain block, i'll have to look into getting one of those if the new chain and sprockets don't work. And have to say that is one sweet lookin' wr!!!! thanks guys

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No i did the wheel change myself but i think your right it probobaly is time for new chain and sprockets. And also thanks for that link to the chain block, i'll have to look into getting one of those if the new chain and sprockets don't work. And have to say that is one sweet lookin' wr!!!! thanks guys

the problem I was having . a new chain would start beat the tire in a few hundred miles . I have no doubt the you need all new chain and sprockets . Also this one sounds kind of wierd but it's true . I noticed rapid spocket wear on the side of the rear spocket toward the tire . I noticed the the chain was pinching the tips of the teeth in a pattern . I was runnin even number teeth on my sprocket I think it was a 44 at the time . the out side links of the chain always hit the same teeth and ground them down. go with odd number teeth they last longer . here's a pic of the side torn up on a 44 and 48 I think I'm running a 45 and a 13 now. Can you see how every other tooth has a differant wear mark ? you can tell better on the black one

DSC00995.jpg

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the problem I was having . a new chain would start beat the tire in a few hundred miles . I have no doubt the you need all new chain and sprockets . Also this one sounds kind of wierd but it's true . I noticed rapid spocket wear on the side of the rear spocket toward the tire . I noticed the the chain was pinching the tips of the teeth in a pattern . I was runnin even number teeth on my sprocket I think it was a 44 at the time . the out side links of the chain always hit the same teeth and ground them down. go with odd number teeth they last longer . here's a pic of the side torn up on a 44 and 48 I think I'm running a 45 and a 13 now. Can you see how every other tooth has a differant wear mark ? you can tell better on the black one

DSC00995.jpg

....aluminum sproket of an even number of teeth. Same part of the chain rides in the same place all the time. You can get some more wear out of it by moving the chain on the sprocket one tooth every few hundred miles. Same thing happens to steel too, just to a lesser degree, Counter Shaft too.

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ok guys i need some help. My back wheel went in for a new tyre a couple of weeks ago and when i put the wheel back on the bike the chain started to catch the rim of the wheel. The tyre is identical to one it replaced and the chain never caught the rim before so i can't work out why it is now? The wheels are set up straight and i even tried adjusting the wheel at an angle in favour of the chain to try and get a bigger gap between the chain and the rim but it was still catching the rim. Now i know i should have stopped riding the bike and got the problem sorted as soon as as it started to happen but the bike is just so much fun i couldn't resist a ride when the sun came out :bonk: But now its gotten to a point where i am not willing to do anymore damage to the wheel so i need to get this sorted. The only thing i can think of is to get a new chain and sprockets? I've tried taking the wheel of and switching the spacers around but nothings worked?? Anyway heres a link to some pictures of the damage

http://www.bikepics.com/members/wilma397/04wr450f/

Any help would be greatly appreciated, thanks alot :lame:

You can dish the wheel (loosen the spokes a turn on the left side of the wheel, tighten a turn on the right side) 5 or 10 mm towards the right. This will eliminate the chain slap somewhat. Only DIY is you are competent working on wheels.

The chain block is a good idea (and a fresh chain) too.

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....aluminum sproket of an even number of teeth. Same part of the chain rides in the same place all the time. You can get some more wear out of it by moving the chain on the sprocket one tooth every few hundred miles. Same thing happens to steel too, just to a lesser degree, Counter Shaft too.

I understand all that but those spockets are both junk ,with only about 600 miles . the tire slapping make them wear very fast . now the ones I have on there now are odd tooth # and are steel too but they have like 1500 miles on them , and they are not showing wear . I was even wearing out steel ones in about 1000 miles . it's just much easier to put a odd # tooth sprocket on rather then playing with the chain every couple days.

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i had to shave my tire down some. i still hit some times. i am making a chain roller this winter i just have not had time. tweav is right need a chain block. also a lot of tire rub depends on size and what kind of tire. i run a pilot power 160/60 17

DSC_0586.jpg

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