Swapping cassettes
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Swapping cassettes
On some thread I heard someone say about switching from road to mountain cassettes a spacer was neccessary for proper alignment of the other cassette.
I'm buying a Trek 920 that comes with a Sram PG1030 11-36 cassette. I also bought a Sram PG 1070 12-28 so I would have tighter gearing on pavement. So can I switch these back and forth as I choose, or is some sort of spacer needed for proper alignment of the other casssette?
Thanks
I'm buying a Trek 920 that comes with a Sram PG1030 11-36 cassette. I also bought a Sram PG 1070 12-28 so I would have tighter gearing on pavement. So can I switch these back and forth as I choose, or is some sort of spacer needed for proper alignment of the other casssette?
Thanks
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On some thread I heard someone say about switching from road to mountain cassettes a spacer was neccessary for proper alignment of the other cassette.
I'm buying a Trek 920 that comes with a Sram PG1030 11-36 cassette. I also bought a Sram PG 1070 12-28 so I would have tighter gearing on pavement. So can I switch these back and forth as I choose, or is some sort of spacer needed for proper alignment of the other casssette?
Thanks
I'm buying a Trek 920 that comes with a Sram PG1030 11-36 cassette. I also bought a Sram PG 1070 12-28 so I would have tighter gearing on pavement. So can I switch these back and forth as I choose, or is some sort of spacer needed for proper alignment of the other casssette?
Thanks
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If there is significant mileage on the existing chain, you may want to consider getting a new chain for the new cassette and keeping the cassette/chain pairs together. This will allow you to run an optimum-length chain for each cassette (the 28 tooth can run a shorter chain) and eliminate a possible issue with a somewhat-worn chain not playing well with the new cassette. You will still likely need to make minor indexing, limit- and B-screw tweaks when you swap chains/cassettes; this is true even when switching like for like.
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On my Cannondale touring bike with 9 speed Shimano I interchange between 13-25, 12-27 and 11-24 cassettes. Never change chains, adjust deraileurs or use any spacers and it all works fine.
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Shimano 11 speed MTB cassettes are supposed to fit on a 10s freehub.
Shimano 11 speed Road cassettes are supposed to require a 11s freehub.
There is also apparently a difference in cog spacing between the two which could cause headaches with indexed shifters.
Shimano 11 speed Road cassettes are supposed to require a 11s freehub.
There is also apparently a difference in cog spacing between the two which could cause headaches with indexed shifters.
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I'm buying a Trek 920 that comes with a Sram PG1030 11-36 cassette. I also bought a Sram PG 1070 12-28 so I would have tighter gearing on pavement. So can I switch these back and forth as I choose, or is some sort of spacer needed for proper alignment of the other casssette?
There is no such thing as a "mountain" or "road" cassette. All 10 speed cassettes are the same length. All 11 speed cassettes are the same length. There is no difference in cog spacing.
However, as @ypsetihw says, a b-tension adjustment may improve shifting.
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Shimano 11 speed road cassettes require a 11 speed freehub - MTB cassettes will fit on a 10 speed freehub - at least that's what I've read.
#9
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Yes, you can swap those back and forth with no other changes. The cassettes are the same length.
There is no such thing as a "mountain" or "road" cassette. All 10 speed cassettes are the same length. All 11 speed cassettes are the same length. There is no difference in cog spacing.
However, as @ypsetihw says, a b-tension adjustment may improve shifting.
There is no such thing as a "mountain" or "road" cassette. All 10 speed cassettes are the same length. All 11 speed cassettes are the same length. There is no difference in cog spacing.
However, as @ypsetihw says, a b-tension adjustment may improve shifting.
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Of course, pay attention to the chain capacity of your RD.
Shimano makes this difficult with different cable pull ratios for 10s MTB and Road. You can solve this with a long cage MTB RD (9-speed or earlier) paired with 10-speed road shifters.
With SRAM, their 10-speed road and MTB RDs use the same cable pull, so you can use a 10-speed long cage MTB RD with their 10-speed road shifters.
Everything got screwy again with 11-speed.
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All Shimano/SRAM 10 speed cassettes are the same cog pitch and overall width. They all come with a 1 mm spacer.
I was incorrect on 11-speed though (I have no 11-speed bikes, so I should've kept my mouth shut).
Shimano and SRAM went with different cog pitches for their MTB and Road product lines. Their shifters and cassettes are not cross-compatible between MTB and Road for 11 speed.
11-speed MTB hubs overhang the end of the freehub body, that's how they fit on the smaller 10-speed freehubs.
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