SRAM cassettes that completely disassemble
04-28-20, 04:13 AM
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SRAM cassettes that completely disassemble
I have a SRAM PC 950 on an older 2007 bike. The cassette completely disassembles, as in you can remove each cog individually. Each cog and spacer has a hole that slides into an alignment pin that inserts into the rear of the big cog. I love it because you can clean each cog by hand. I also saw a used PC 970 on ebay that is the same but I'm not sure how new it is. One of mine has a broken tooth and unfortunately it doesn't look like you can buy individual cogs. It would be nice because you could customize your cassette to the exact gearing you want like older high end freewheels were. Not sure why no one makes cassettes like that. They probably want to scam you and make you buy a whole new cassette when you have one broken tooth lol
My question is are the new 9sp casettes still like that, and what about their 10 and 11sp cassettes? Are they the same?
My question is are the new 9sp casettes still like that, and what about their 10 and 11sp cassettes? Are they the same?
Last edited by Lazyass; 04-28-20 at 04:17 AM.
04-28-20, 04:31 AM
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Look how clean it is. You can buff and polish each cog if you desire and it takes less time and less mess than trying to clean a cassette with a brush.
04-28-20, 04:48 AM
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Are you certain that the "broken" tooth is not just a truncated tooth, shaped that way to aid in shifting? Like the ones at 3 and 9 o'clock on the largest cog?
04-28-20, 07:05 AM
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BITD, when cogs were "flat", 5 or 6-speed were the norm, shifting was only friction and "cog boards" were available in any good bike shop, you could indeed customize a freewheel. However the creation of shaped teeth with specific shifting ramps that made indexing reliable also meant cog sets had to be used in a specific order. Mix-and-match no longer works well and the ability to improvise cassettes went away.
04-28-20, 08:48 AM
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Better not ride the bike! It'll get dirty again.
I have taken apart those SRAM cassettes..... I buy 2 different 8 speed cassettes and mix a couple of cogs to get the gears I want.
Don't notice any shifting problems.
I leave the cassette on the freehub and wipe it down. No point in getting it sanitary ... more dirt is on the way.
I have taken apart those SRAM cassettes..... I buy 2 different 8 speed cassettes and mix a couple of cogs to get the gears I want.
Don't notice any shifting problems.
I leave the cassette on the freehub and wipe it down. No point in getting it sanitary ... more dirt is on the way.
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04-28-20, 12:07 PM
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BITD, when cogs were "flat", 5 or 6-speed were the norm, shifting was only friction and "cog boards" were available in any good bike shop, you could indeed customize a freewheel. However the creation of shaped teeth with specific shifting ramps that made indexing reliable also meant cog sets had to be used in a specific order. Mix-and-match no longer works well and the ability to improvise cassettes went away.
On the other hand, none of those bikes use STI’s, all of them are indexed down tube shifted. Can’t speak to whether they would shift as well with them newfangled doodads.
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04-29-20, 06:57 PM
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I have a SRAM PC 950 on an older 2007 bike. The cassette completely disassembles, as in you can remove each cog individually. Each cog and spacer has a hole that slides into an alignment pin that inserts into the rear of the big cog. I love it because you can clean each cog by hand. I also saw a used PC 970 on ebay that is the same but I'm not sure how new it is. One of mine has a broken tooth and unfortunately it doesn't look like you can buy individual cogs. It would be nice because you could customize your cassette to the exact gearing you want like older high end freewheels were. Not sure why no one makes cassettes like that. They probably want to scam you and make you buy a whole new cassette when you have one broken tooth lol
My question is are the new 9sp casettes still like that, and what about their 10 and 11sp cassettes? Are they the same?
My question is are the new 9sp casettes still like that, and what about their 10 and 11sp cassettes? Are they the same?
The 8 sp 850 is also like that. I make my own ratio 7 and 8 sp cassettes out of them.
Another advantage of these cogs over shimano ones is the lighter weight, they have way less material in the larger cogs.
For 9+ speeds, I do prefer the spidered cassettes for lighter weight.
04-30-20, 12:10 AM
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Better not ride the bike! It'll get dirty again.
I have taken apart those SRAM cassettes..... I buy 2 different 8 speed cassettes and mix a couple of cogs to get the gears I want.
Don't notice any shifting problems.
I leave the cassette on the freehub and wipe it down. No point in getting it sanitary ... more dirt is on the way.
I have taken apart those SRAM cassettes..... I buy 2 different 8 speed cassettes and mix a couple of cogs to get the gears I want.
Don't notice any shifting problems.
I leave the cassette on the freehub and wipe it down. No point in getting it sanitary ... more dirt is on the way.
I've done that with 2 SRAM 8sp cassettes. No shifting issues with mix & match.
05-01-20, 11:27 AM
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Some of the Sunrace and innominata brands out of Taiwan in 8-9 spds also disassemble in that fashion and
are spline compatible with SRAM/Shimano. I need these when I do rebuilds on my 6spd mid drive recumbent
every few years. FWIW I believe another reason besides 'weight reduction" for carrier mount large cogs in
triplets and doublets is to reduce manufacturing labor costs when assembling bikes. Seconds add up over
tens of thousands of bikes/wheels. I suspect SRAM electric shift groups would boot Shimano out of the
market if they were priced similarly and had as broad a range as they are so much less labor intensive to install
than Shimano.
are spline compatible with SRAM/Shimano. I need these when I do rebuilds on my 6spd mid drive recumbent
every few years. FWIW I believe another reason besides 'weight reduction" for carrier mount large cogs in
triplets and doublets is to reduce manufacturing labor costs when assembling bikes. Seconds add up over
tens of thousands of bikes/wheels. I suspect SRAM electric shift groups would boot Shimano out of the
market if they were priced similarly and had as broad a range as they are so much less labor intensive to install
than Shimano.
05-01-20, 11:52 AM
#12
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Better cassettes have the larger cogs on spiders. Saves weight and doesn't dig into the HG hubbody.
You must like xD cassettes that are literally one piece.
Normally you ride in many cogs. The smaller ones usually wear and skip first. But all the other ones will be worn as well. Just makes no sense to replace them one by one. My guess you also don't replace the chain before it breaks and then only the broken link? Chain manufacturers are also scamming you - instead of selling single links they force an entire chain on you....😁
You must like xD cassettes that are literally one piece.
Normally you ride in many cogs. The smaller ones usually wear and skip first. But all the other ones will be worn as well. Just makes no sense to replace them one by one. My guess you also don't replace the chain before it breaks and then only the broken link? Chain manufacturers are also scamming you - instead of selling single links they force an entire chain on you....😁
