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still slips new freewheel new chain

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still slips new freewheel new chain

Old 07-31-06, 12:16 PM
  #1  
balto charlie
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still slips new freewheel new chain

Ok So I replaced the chain and freewheel. I upgraded from a 6 speed to a seven speed. Shifts like butter most of the time, quiet as can be then out of nowhere as I start to hammer up a hill I get slippage in the smaller gears. I have a friction , downtube shifters. I figure the problem rest with the chain(kink) though running it backwards I get a smooth run. RD might be the problem but me thinks that slipping would happen everywhere. Could it be the cables?? What y'all think? Tonight I will check each and every linkage of the chain then I'll be clueless. Might the front chainrings be the problem.? They 'look' good. Thanks Charlie
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Old 07-31-06, 01:18 PM
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Is it shifting unintentionally on you? Frame-flex on the up-hills can change the distance of the cable-run and cause the RD to shift.
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Old 07-31-06, 01:29 PM
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Originally Posted by balto charlie
Ok So I replaced the chain and freewheel. I upgraded from a 6 speed to a seven speed. Shifts like butter most of the time, quiet as can be then out of nowhere as I start to hammer up a hill I get slippage in the smaller gears. I have a friction , downtube shifters. I figure the problem rest with the chain(kink) though running it backwards I get a smooth run. RD might be the problem but me thinks that slipping would happen everywhere. Could it be the cables?? What y'all think? Tonight I will check each and every linkage of the chain then I'll be clueless. Might the front chainrings be the problem.? They 'look' good. Thanks Charlie
I've never seen a chain slip on a chainring, but if the chainring was really worn out, I suppose it could happen.

When you say that the chain slips, does it move onto another cog? Or does it just jump as if it's not grabbing the cog, and then grip it again once you release the pressure on the pedals?

You say you're hammering up a hill on the smallest cogs: are you using the granny chainring with your small cogs? This is usually not a good gear combination for several reasons. One is that the angle of the chain often causes it to rub on the front derailer. But another reason is that when you use the granny gear, you get a LOT of torque (because its diameter is so small), and you generate a high chain tension, which means a lot of force is applied between the chain and the cog. This would virtually guarantee a slipping chain if you had an OLD chain/freewheel, but it still doesn't explain it if they're really brand new.
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Old 07-31-06, 04:37 PM
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I recently replaced my 6 speed freewheel with a 7 speed, and replaced the chain. For a while I would get a litle slippage, just the freewheel tightning up more than I did with the wrench! Didn't last long, but really felt funny when it happened while hammering!
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Old 08-01-06, 07:46 AM
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Originally Posted by balto charlie
Ok So I replaced the chain and freewheel. I upgraded from a 6 speed to a seven speed. Shifts like butter most of the time, quiet as can be then out of nowhere as I start to hammer up a hill I get slippage in the smaller gears. I have a friction , downtube shifters. I figure the problem rest with the chain(kink) though running it backwards I get a smooth run. RD might be the problem but me thinks that slipping would happen everywhere. Could it be the cables?? What y'all think? Tonight I will check each and every linkage of the chain then I'll be clueless. Might the front chainrings be the problem.? They 'look' good. Thanks Charlie
Did you check your new chain for proper length? Did you use the old one to size it correctly?
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Old 08-01-06, 08:14 AM
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Hi and thanks
Mothra: Don't think it's flex of the bike as it never occurred before changing out the parts.
mox(long time no see) I don't think chain rings as I really inspected and they look good enough. You might have something about my shifting at the right time. It did seem to slip a little when I did nothing other than pedal.
No racer: Chain measured exactly like the old one
Halfast: you might be onto something here. I didn't tighten it real well figuring the peddling would solve the problem. This AM I had no problems; however my ride is mostly downhill.

I did check the chain last night and it is fine, no kinks. The cables look like crap and will replace tonight. The ride home will tell lots as it is mostly uphill(6 uphill miles in 100F+ heat). Stay tune. Charlie
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