Cassette 12-32t / 14-34t swap without chain modification?
05-06-11, 02:46 PM
#2
The Drive Side is Within
if the cassette is on the older side, a chain replacement might be in order anyway...
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05-06-11, 04:34 PM
#4
rebmeM roineS
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Try it and see if it works. If the chain is worn, you may end up with a skipping chain on a new cassette.
Before riding, very carefully see if the chain is long enough for the big-big combo. If that doesn't work, the chain is too short.
Before riding, very carefully see if the chain is long enough for the big-big combo. If that doesn't work, the chain is too short.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer
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Break the old chain with a bolt cutter.
05-06-11, 06:15 PM
#6
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If you have any doubt, get a new chain. An old chain will ruin a new cassette and then you'll have to buy both anyway. So save yourself the hassle.
05-07-11, 12:45 AM
#8
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Where did you find a 14-34 cassette? It is a custom combination? Neither Shimano nor SRAM make one. Shimano has a 14-32 and a 13-34, but not 14-34.
Perhaps you're talking about a freewheel, in which case 14-34 is "common". However 12-32 is not a common freewheel configuration.
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To got from 32 to 34th max, needs one extra chain roller. (The chain goes half way around the gears.) Chain lengths can only be adjusted in two roller increments (unless you opt for a "half link".) Thus there is automatically a 50% chance that the chain is already long enough.
The other question is whether your rear derailleur can reach 34t. Many older ones cannot.
Perhaps you're talking about a freewheel, in which case 14-34 is "common". However 12-32 is not a common freewheel configuration.
---
To got from 32 to 34th max, needs one extra chain roller. (The chain goes half way around the gears.) Chain lengths can only be adjusted in two roller increments (unless you opt for a "half link".) Thus there is automatically a 50% chance that the chain is already long enough.
The other question is whether your rear derailleur can reach 34t. Many older ones cannot.
05-07-11, 01:05 AM
#9
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Where did you find a 14-34 cassette? It is a custom combination? Neither Shimano nor SRAM make one. Shimano has a 14-32 and a 13-34, but not 14-34.
Perhaps you're talking about a freewheel, in which case 14-34 is "common". However 12-32 is not a common freewheel configuration.
---
To got from 32 to 34th max, needs one extra chain roller. (The chain goes half way around the gears.) Chain lengths can only be adjusted in two roller increments (unless you opt for a "half link".) Thus there is automatically a 50% chance that the chain is already long enough.
The other question is whether your rear derailleur can reach 34t. Many older ones cannot.
Perhaps you're talking about a freewheel, in which case 14-34 is "common". However 12-32 is not a common freewheel configuration.
---
To got from 32 to 34th max, needs one extra chain roller. (The chain goes half way around the gears.) Chain lengths can only be adjusted in two roller increments (unless you opt for a "half link".) Thus there is automatically a 50% chance that the chain is already long enough.
The other question is whether your rear derailleur can reach 34t. Many older ones cannot.
