Going from a 11-25 to 12-30 cassettee
Just attempted to install a new 12-30 Cassette on my Foil 40 which came with a 53/39 Crankset and a 11-25 Cassette. Got it all together and the Rear Derailleur will not move in to pick up the 30 tooth. What do I need to do? BTW, I am pushing 73 years old and I need a lot of help on the 10 percent grades.
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Return the bike and get one with a compact crank set 50/34.
It will work with the 12/30 cassette. |
What's a Foil 40?
Did you lengthen the chain the proper amount? Adjust the "B" screw? What RDER does it have. It may not be able to handle a 30T cog. |
First, make absolutely certain that your chain is long enough to engage the big chainring (in front) and the big cog(rear) without straining the derailleur. Do this by turning the crank GENTLY as you shift and STOP if there is significant resistance.
If your chain was near the minimum length required for the 25T cog it will be too short for the 30T and can cause extensive damage if you accidentally shift into that combination while pedaling. Assuming that your rear derailleur will handle the 30T cog (not guaranteed that it will) you should be able to adjust the derailleur using this procedure: http://www.parktool.com/blog/repair-...nts-derailleur Make certain that there are not any unneeded spacers (perhaps left over from the old cassette) under the cassette before you begin; if present they will push the cassette away from the hub and possibly out of reach of the derailleur. |
The Foil 40 is an entry level full carbon put out by Scott. The Rear Derailleur is a Shimano 105, RD-5700A,
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I guess I could type this in a white font and really make things difficult.
The RDER should be capable of handling an 11-30 cassette per Shimano spec's, so that's not the problem. |
Originally Posted by BobBlooms
(Post 15850737)
The Foil 40 is an entry level full carbon put out by Scott. The Rear Derailleur is a Shimano 105, RD-5700A,
http://www.scott-sports.com/global/e...21876/foil-40/ |
The 53/39 is great in Florida, but not in New England. I have had the bike for about 18 months now and looking for quick fix until I get a new bike with a compact crankset.
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Going out tomorrow to pick up some new chain to see if that makes it work. I think that may be the problem as the derailleur pulley is up close to the 30 tooth cog.
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Originally Posted by BobBlooms
(Post 15850794)
The 53/39 is great in Florida, but not in New England. I have had the bike for about 18 months now and looking for quick fix until I get a new bike with a compact crankset.
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Drew you are correct. I have an old Trek triple hybrid that I could climb with. However, I need one of my sons to help be put it in the back of the pick up
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Originally Posted by BobBlooms
(Post 15850810)
Going out tomorrow to pick up some new chain to see if that makes it work. I think that may be the problem as the derailleur pulley is up close to the 30 tooth cog.
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Originally Posted by dsbrantjr
(Post 15850726)
First, make absolutely certain that your chain is long enough to engage the big chainring (in front) and the big cog(rear) without straining the derailleur. Do this by turning the crank GENTLY as you shift and STOP if there is significant resistance.
If your chain was near the minimum length required for the 25T cog it will be too short for the 30T and can cause extensive damage if you accidentally shift into that combination while pedaling. Assuming that your rear derailleur will handle the 30T cog (not guaranteed that it will) you should be able to adjust the derailleur using this procedure: http://www.parktool.com/blog/repair-...nts-derailleur Make certain that there are not any unneeded spacers (perhaps left over from the old cassette) under the cassette before you begin; if present they will push the cassette away from the hub and possibly out of reach of the derailleur. |
"the derailleur pulley is up close to the 30 tooth cog." Besides making sure the chain is long enough the "B" screw will likely need to be adjusted to clear the new larger cog. This adjustment is covered in the Park Tool procedure.
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Originally Posted by 10 Wheels
(Post 15850827)
Get a longer derailleur and a 11/34 cassette.
What your will need is this: http://www.amazon.com/Shimano-5701-D.../dp/B007Q4N8LQ http://www.competitivecyclist.com/pr...6545.25.1.html |
Originally Posted by bikepro
(Post 15850884)
According to Competitive Cyclist, this RD has a capacity of 33 teeth. This gearing configuration requires 32. Unfortunately, the max cog size it will accommodate is 28.
http://www.competitivecyclist.com/pr...6545.25.1.html My Felt has a 11/34 cassette that works. Shimano says 28 T is the limit. http://i256.photobucket.com/albums/h...5-39-24002.jpg |
Originally Posted by 10 Wheels
(Post 15850898)
I real life that is Not True.
My Felt has a 11/34 cassette that works. Shimano says 28 T is the limit. http://i256.photobucket.com/albums/h...5-39-24002.jpg |
Originally Posted by 10 Wheels
(Post 15850898)
I real life that is Not True.
My Felt has a 11/34 cassette that works. Shimano says 28 T is the limit. http://i256.photobucket.com/albums/h...5-39-24002.jpg |
Originally Posted by bikepro
(Post 15850884)
According to Competitive Cyclist, this RD has a capacity of 33 teeth. This gearing configuration requires 32. Unfortunately, the max cog size it will accommodate is 28.
What your will need is this: http://www.amazon.com/Shimano-5701-D.../dp/B007Q4N8LQ http://www.competitivecyclist.com/pr...6545.25.1.html |
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