Other than getting one less gear, of course, it seems to me that one could change the chain rings up front and get the same gear combinations while running the cheaper 9 speed stuff. What am I missing?
Fred
Fred
Why 10 spd Instead of 9 spd?
RagerXS
1 - 5 of 94 Posts
Joined
·
946 Posts
For the true 2x10 system, I suspect the two remaining chainrings are closer to the center of the chainline. The smaller ring being moved outboard and the outer ring being move inboard. This allows the use of all the cassette cogs without creating a cross-chain condition. Additionally, with the chain more parallel to the chainline, there will be less chain rub issues with the front derailleur.
It's interesting how SRAM and Shimino are approaching the 10 sp option. SRAM with their XX is asking us to pedal bigger gear ratios, Shimano using the standard triple crankset (24-32-44) and 11-36 cassette is allowing us to pedal essentially the same gear rations with less gap between them . I think Shimano is trying not to be left behind by the 10 sp conversion but is unwilling to commit to the real advantages of a 2x10 drivetrain. Personally, I think the Shimano 10 sp. upgrade will made by a confused consumer that is willing to spend $600-$800 to get a 36 gear that they probably don't need, or possibly gaining some advantage by slightly reducing the gaps between gear ratios. The next two drivetrain years are going to be interesting. I'll make the conversion, I just want to make the right one. I believe the two chainring concept will eventually become the standard.
It's interesting how SRAM and Shimino are approaching the 10 sp option. SRAM with their XX is asking us to pedal bigger gear ratios, Shimano using the standard triple crankset (24-32-44) and 11-36 cassette is allowing us to pedal essentially the same gear rations with less gap between them . I think Shimano is trying not to be left behind by the 10 sp conversion but is unwilling to commit to the real advantages of a 2x10 drivetrain. Personally, I think the Shimano 10 sp. upgrade will made by a confused consumer that is willing to spend $600-$800 to get a 36 gear that they probably don't need, or possibly gaining some advantage by slightly reducing the gaps between gear ratios. The next two drivetrain years are going to be interesting. I'll make the conversion, I just want to make the right one. I believe the two chainring concept will eventually become the standard.
Joined
·
946 Posts
Boomn
I edited my first post when I remembered the Shimano triple uses a 24 small ring. I then read your post where you stated correctly the gear ratios are the same.
My statement about SRAM asking you to push bigger gears was based on a 26x36 gear ratio (.72) which is higher than a 22x34 (.64).
Best of my knowledge SRAM XX is offering these chain ring combinations: (26-39), (28-42), (30-45). I can't find number of teeth per cog on their XX 11-36 cassette, but it should be similar to Shimano's.
I agree that staying on one ring has an advantage, since 90% of my small to middle ring shifts involve a double shift, because I also adjust what cog I'm on too.
I edited my first post when I remembered the Shimano triple uses a 24 small ring. I then read your post where you stated correctly the gear ratios are the same.
My statement about SRAM asking you to push bigger gears was based on a 26x36 gear ratio (.72) which is higher than a 22x34 (.64).
Best of my knowledge SRAM XX is offering these chain ring combinations: (26-39), (28-42), (30-45). I can't find number of teeth per cog on their XX 11-36 cassette, but it should be similar to Shimano's.
I agree that staying on one ring has an advantage, since 90% of my small to middle ring shifts involve a double shift, because I also adjust what cog I'm on too.
Joined
·
946 Posts
XX was the flagship for the 2x10 system. It doesn't seem like anyone else is really ready yet to commit to the two chainring crankset. (2 ringers with a bash guard don't count).boomn said:
So with the other 10 sp/triple options you are gaining only a partial advantage (and the new triples with 36 cogs are going to add overall weight to your bike).
Clarkenstein: Obsolescence has always been a marketing strategy, but true technological improvements will out sell the hype.
Joined
·
946 Posts
Removing the big ring...
I believe some people would be surprised to learn that for a standard 11-34 9sp and a 22-32-42 crankset only the 13 and 11 cogs offer a larger (harder pedaling) ratio on the big ring. (See chart below)
I removed my big ring in favor of a bash guard for the following reasons:
1) more clearance for going over obstacles
2) only the smallest cogs (11-13) offered more pedaling resistance
3) the big ring is a safety hazard; basically a dirty saw waiting to cut into your lower leg when you crash.
The second chart is the Shimano 10 speed ratios with a 24 small chain ring and 11-36 cassette.
I believe some people would be surprised to learn that for a standard 11-34 9sp and a 22-32-42 crankset only the 13 and 11 cogs offer a larger (harder pedaling) ratio on the big ring. (See chart below)
I removed my big ring in favor of a bash guard for the following reasons:
1) more clearance for going over obstacles
2) only the smallest cogs (11-13) offered more pedaling resistance
3) the big ring is a safety hazard; basically a dirty saw waiting to cut into your lower leg when you crash.
The second chart is the Shimano 10 speed ratios with a 24 small chain ring and 11-36 cassette.
Attachments
1 - 5 of 94 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
