Some time ago I installed seven of eight cogs from an 8 speed cassette on a 7 speed freewheel. I intended to leave out the second cog but, through an oversight, I left out the first one instead. I didn't realize my mistake until I took it off. I only put about 500 miles on this setup (I have a lot of bikes).
I don't doubt that the interlocking of the serrations on the small cog and lockring help everything stay tight. But this experience makes me wonder how necessary they are. I would love to build up cassettes with a 14 or 15 tooth small cog.
Before doing this I was wondering if anyone (else) has any experience doing this.
Some time ago I installed seven of eight cogs from an 8 speed cassette on a 7 speed freewheel. I intended to leave out the second cog but, through an oversight, I left out the first one instead. I didn't realize my mistake until I took it off. I only put about 500 miles on this setup (I have a lot of bikes).
I don't doubt that the interlocking of the serrations on the small cog and lockring help everything stay tight. But this experience makes me wonder how necessary they are. I would love to build up cassettes with a 14 or 15 tooth small cog.
Before doing this I was wondering if anyone (else) has any experience doing this.
Thanks in advance, Tom
I've used 13t second positions as first postions. Just gotta make sure the lockring is tight. You could Dremel little notches in the cog I guess to make sure.
Some time ago I installed seven of eight cogs from an 8 speed cassette on a 7 speed freewheel. I intended to leave out the second cog but, through an oversight, I left out the first one instead. I didn't realize my mistake until I took it off. I only put about 500 miles on this setup (I have a lot of bikes).
I don't doubt that the interlocking of the serrations on the small cog and lockring help everything stay tight. But this experience makes me wonder how necessary they are. I would love to build up cassettes with a 14 or 15 tooth small cog.
Before doing this I was wondering if anyone (else) has any experience doing this.
Thanks in advance, Tom
Depends on the cassette. With Campagnolo 9 speed, the first cog has a built in spacer. The spacer on the first cog is the only part that is engaged with the hub body. The actual teeth of the cog are in mid air over the threads of the locknut. If you tried to put a normal, non built in spacer cog in the first position, it would have no support and would sit on the locknut threads. And spin if you tried to use it because it is not engaged with the hub body.
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Quoted message said:
I don't doubt that the interlocking of the serrations on the small cog and lockring help everything stay tight. But this experience makes me wonder how necessary they are. I would love to build up cassettes with a 14 or 15 tooth small cog.
Such cassettes are reasonably available - USCF regulations limit gear inches for junior racers. I know Veloce's available in a 9- & 10-speed 14-23 and 14-28, and looking at Airbomb.com, I see Shimano has a 7-speed 14-32, a 9-speed 14-25, and a 10-speed 16(!)-27.
Currently I'm riding on 7 sp cassette which is actually 9 sp SRAM 7.0 - without the biggest and the smallest cogs. It works fine on my mtb-commuting bike.
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Quoted message said:
Some time ago I installed seven of eight cogs from an 8 speed cassette on a 7 speed freewheel. I intended to leave out the second cog but, through an oversight, I left out the first one instead. I didn't realize my mistake until I took it off. I only put about 500 miles on this setup (I have a lot of bikes). I don't doubt that the interlocking of the serrations on the small cog and lockring help everything stay tight. But this experience makes me wonder how necessary they are. I would love to build up cassettes with a 14 or 15 tooth small cog. Before doing this I was wondering if anyone (else) has any experience doing this.
Just carry a cassette tool in case the lockring comes loose. --------------- Alex
