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  1. #1
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    Ultra wide 7 speed cassettes

    Anyone install an ultrawide (11/34) cassette on a 7 speed freehub? It appears to be a bit of a hassle to install and getting all the necessary parts besides the cassette. What are the downsides? Do you lose RD indexing? I guess Sheldon Brown describes the procedure most fully. I prefer to not grind down my standard hub to fit the 11t cog in case I want to restore the original cassette, which is 13/30.

    Sinchi

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    Quote Originally Posted by stonooka
    Anyone install an ultrawide (11/34) cassette on a 7 speed freehub? It appears to be a bit of a hassle to install and getting all the necessary parts besides the cassette. What are the downsides? Do you lose RD indexing? I guess Sheldon Brown describes the procedure most fully. I prefer to not grind down my standard hub to fit the 11t cog in case I want to restore the original cassette, which is 13/30.

    Sinchi
    If your rear derailleur will clear the 34T cog, you should have the same quality indexing you always had. As you noted, to use an 11T cog you either need a "compact" compatible freehub body or have to modify an older one by grinding a small amount off of the spline ends

    Can you get a 12x34 cassette? A 12T cog will fit on the freehub body you already have and doesn't give up too much in the way of a high gear.

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    Hi Hillrider,

    Thanks for your helpful response and suggestion for a 12t high end. The last cog on my present 13/30 cassette is loose with the rest staked together. Would the 12t on a 12/34 be loose also? This would allow purchasing the 11/34 from Harris and a separate 12t cog from anywhere. This may also eliminate the need for a special down sized cassette nut required for the 11t cog to prevent chain interference.

    Sinchi

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    如果你能讀了這個你講中文 genericbikedude's Avatar
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    I had one of those megarange freewheels (not cassette). It indexed fine, but the jump from 26 to 34 felt really weird.

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    Quote Originally Posted by genericbikedude
    I had one of those megarange freewheels (not cassette). It indexed fine, but the jump from 26 to 34 felt really weird.
    Yes, I agree, but if it means I can make the long 6% + grades in my area (I'm only a 150 watt engine and my steel bike is not super light). it will be worth it. I also have the Sugino compact triple chain rings so if I use the middle ring and the 34 before using the granny and the 34 the jump won't be as large.

    Sinchi

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    如果你能讀了這個你講中文 genericbikedude's Avatar
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    I only ever used my 24front-34 rear combination when pulling a fresh-air trailer loaded with ten bikes up steep hills. When I was tired. Its crazy overkill (underkill?) for anything else.

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    Quote Originally Posted by stonooka
    Hi Hillrider,

    Thanks for your helpful response and suggestion for a 12t high end. The last cog on my present 13/30 cassette is loose with the rest staked together. Would the 12t on a 12/34 be loose also? This would allow purchasing the 11/34 from Harris and a separate 12t cog from anywhere. This may also eliminate the need for a special down sized cassette nut required for the 11t cog to prevent chain interference.

    Sinchi
    Yes, the smallest ("1st position") cog on any cassette is always loose and has the spacer built in so they aren't interchangable with any other position. Be sure you buy a 12T 1st position cog. And yes, the standard size lock ring will work with a 12T small cog and you need a special lock ring for an 11. However, this isn't a problem since all Shimano cassettes come with the appropriate lock rings.

    Harris can probably also supply the 12T first position cog you want. Send Sheldon an e-mail with what you propose and he will certainly arrange for the right parts.

  8. #8
    meb
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    Quote Originally Posted by HillRider
    Yes, the smallest ("1st position") cog on any cassette is always loose and has the spacer built in so they aren't interchangable with any other position. Be sure you buy a 12T 1st position cog. And yes, the standard size lock ring will work with a 12T small cog and you need a special lock ring for an 11. However, this isn't a problem since all Shimano cassettes come with the appropriate lock rings.

    Harris can probably also supply the 12T first position cog you want. Send Sheldon an e-mail with what you propose and he will certainly arrange for the right parts.
    Usually though, a single loose cog is about half the price of a complete cassette, so you may be just as well off to get a second cassette.

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    Thanks for all the responses everyone!

    I think I now know what I want to do. Buy the 11-34 and the low end 12t cog from Harris. If I really think I need the 11t, I may eventually grind down my standard hub. Hopefully the 11/34 will come with the down sized lock ring.

    Sinchi

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    meb
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    Quote Originally Posted by stonooka
    Thanks for all the responses everyone!

    I think I now know what I want to do. Buy the 11-34 and the low end 12t cog from Harris. If I really think I need the 11t, I may eventually grind down my standard hub. Hopefully the 11/34 will come with the down sized lock ring.

    Sinchi
    Before making a decision premised upon the grinding issue and since it hasn't been explicitly stated, the question ought be asked: Is your carrier body a Hyperglide or Hyperglide C. The fact that you originally had a 13T small cog does not necessarily mean you don't already have one of the later Hyperglide C bodies that was designed to accept the 11T cog. Later bodies/hubs were equipped with the Hyperglide C grooves to accomodate the 11T cog independent of whether there was going to be an 11T, 12T, 13T, or 14T small cog as original equipment.

  11. #11
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    Quote Originally Posted by meb
    Before making a decision premised upon the grinding issue and since it hasn't been explicitly stated, the question ought be asked: Is your carrier body a Hyperglide or Hyperglide C. The fact that you originally had a 13T small cog does not necessarily mean you don't already have one of the later Hyperglide C bodies that was designed to accept the 11T cog. Later bodies/hubs were equipped with the Hyperglide C grooves to accomodate the 11T cog independent of whether there was going to be an 11T, 12T, 13T, or 14T small cog as original equipment.
    Thanks for your response Meb,

    My 7 speed carrier body is definitely a standard Hyperglide, non C (Sheldon Brown has a picture of both types on his web site). However, I found a 7 speed C body at Loose Screws at a better price than a 12 t cog. So with that and the 11/34 from Harris, I should be in business.

    I need to check with Sheldon Brown whether the 11/34 comes with the smaller diameter tightening ring, other wise I can buy the C ring ($9.00) from Loose Screws also. ( I may need a longer wrap RD, but I will wait and see until after I get the 11/34. I seem to have plenty of clearance for the 30t cog with my present well-working vintage RD so it may clear the 34t).

    Sinchi

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