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Home > Forum > Triathlon Forum > Low gear noise when climbing

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Low gear noise when climbing
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sward
May 20, 20 14:09
Post #1 of 10 (1237 views)
If any mechanics can help me out here I would appreciate it.I have a 2014 Cervelo R3 Ultegra with a 34 11 cassette and when I’m climbing short punchy climbs out of the saddle in the lowest gear I get a noise as if it’s coming from the spokes on my rear wheel catching .
If I drop it down 1 gear the noise goes away .
I’m not sure if a tweak is needed to the indexing or I need to lose 5 Kilos .
Last edited by: sward: May 20, 20 15:19
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Re: Low gear noise when climbing [sward] [ In reply to ]
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JasoninHalifax
May 20, 20 15:40
Post #2 of 10 (1199 views)
If it sounds like the spikes are hitting the derailleur, believe it and stop and check /adjust the L limit screw on the RD before you destroy your RD, wheel, frame, or all 3.
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Re: Low gear noise when climbing [JasoninHalifax] [ In reply to ]
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sward
May 20, 20 15:58
Post #3 of 10 (1185 views)
Sorry but what do you mean by spikes ?
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Re: Low gear noise when climbing [sward] [ In reply to ]
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rmt
May 20, 20 16:05
Post #4 of 10 (1178 views)
He means spokes but auto-correct got the better of him!
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Re: Low gear noise when climbing [sward] [ In reply to ]
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TOTRI
May 20, 20 16:07
Post #5 of 10 (1176 views)
You may want to check to see if there is a spacer on there. I had a similar issue with a 34 that I didn’t put it in and cassette wouldn’t get tight enough. Only noticed in smaller gears.

Only with the 34 did I need a spacer.

Someone may correct me but the 34 I believe is from the mountain bike range so needs a spacer.
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Re: Low gear noise when climbing [TOTRI] [ In reply to ]
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sward
May 20, 20 16:10
Post #6 of 10 (1174 views)
It’s been fine for 2-3 years not sure why it’s happening now .I noticed that the hanger was extremely loose when I was cleaning it .Would that be a factor ?
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Re: Low gear noise when climbing [sward] [ In reply to ]
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jimatbeyond
May 20, 20 16:14
Post #7 of 10 (1169 views)
Yes.
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Re: Low gear noise when climbing [jimatbeyond] [ In reply to ]
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sward
May 20, 20 16:18
Post #8 of 10 (1163 views)
Just checked and it’s rubbing on the inside of the upper jockey wheels .
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Re: Low gear noise when climbing [sward] [ In reply to ]
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spudone
May 20, 20 16:24
Post #9 of 10 (1159 views)
sward wrote:
It’s been fine for 2-3 years not sure why it’s happening now .I noticed that the hanger was extremely loose when I was cleaning it .Would that be a factor ?
Derailleur hanger can be bent, also. You can replace it or use a tool to check / straighten it if that's the case.
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Re: Low gear noise when climbing [spudone] [ In reply to ]
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MattyK
May 20, 20 18:24
Post #10 of 10 (1113 views)
spudone wrote:
Derailleur hanger can be bent, also. You can replace it or use a tool to check / straighten it if that's the case.
This.
Check your hanger is straight and then re-check your low limit screw.
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