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question: mixing 7 speed sprockets
I have an old 7 spd 13-23, and an old 7 spd 11-28. Alas, I'd like to have
an old 13-28. I have the sprockets to do it, and I just need to drill out the rivets holding most of the sprockets on these cassettes together. However, this page from Sheldon Brown gives me pause: http://www.sheldonbrown.com/k7.html#7cassettes He claims that "Sprockets shown in color are interchangeable with other same-size sprockets shown in the same color." Well, the sprockets listed for the 13-23 "I" cassette are all red and green, and the sprockets listed on the 11-28 "ac/aj" cassette are all black! What does this mean, and will it prevent me from acheiving my 13-28 goal? Thanks, Kyle |
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#2
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question: mixing 7 speed sprockets
Kyle.B.H wrote:
I have an old 7 spd 13-23, and an old 7 spd 11-28. Alas, I'd like to have an old 13-28. I have the sprockets to do it, and I just need to drill out the rivets holding most of the sprockets on these cassettes together. However, this page from Sheldon Brown gives me pause: http://www.sheldonbrown.com/k7.html#7cassettes He claims that "Sprockets shown in color are interchangeable with other same-size sprockets shown in the same color." Well, the sprockets listed for the 13-23 "I" cassette are all red and green, and the sprockets listed on the 11-28 "ac/aj" cassette are all black! What does this mean, and will it prevent me from acheiving my 13-28 goal? If you want a 13-28, why not just buy an "M" cassette? That's one of the standard combinations. The business with matching the colors is if you want to preservee the silent Hyperglide shifting functionality. You can freely mix and match to make custom cassettes, but if you break the prescribed sequence, the shifting may be a teensy weensy bit slower and may make a tiny bit of noise (still be way better than anything Eddy Merckx ever raced on!) If you're trying to put together some unusal internal jumps between the 13 and 28, note that the 11-28 cassette is available both as IG and an HG version. It will simplify things if you work with the HG version. Sheldon "K7" Brown +------------------------------------------------------------+ | People who go broke in a big way never miss any meals. | | It is the poor jerk who is shy half a slug | | who must tighten his belt. --Robert A. Heinlein | +------------------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
#3
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question: mixing 7 speed sprockets
Kyle.B.H wrote:
I have an old 7 spd 13-23, and an old 7 spd 11-28. Alas, I'd like to have an old 13-28. I have the sprockets to do it, and I just need to drill out the rivets holding most of the sprockets on these cassettes together. However, this page from Sheldon Brown gives me pause: http://www.sheldonbrown.com/k7.html#7cassettes He claims that "Sprockets shown in color are interchangeable with other same-size sprockets shown in the same color." Well, the sprockets listed for the 13-23 "I" cassette are all red and green, and the sprockets listed on the 11-28 "ac/aj" cassette are all black! What does this mean, and will it prevent me from acheiving my 13-28 goal? It means that the Hyperglide ramps only line up exactly right if you interchange a red for red sprocket, etc. In your case, when you take the 13-23, remove the 14 and 23, and add the 24 and 28 from the other cassette, shifting on two shifts (13-15 and 21-24) will be degraded by precisely 0.074 SSU (Shimano Shifting Units). May the Lord have mercy on your soul. |
#4
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question: mixing 7 speed sprockets
"Kyle.B.H" wrote in message news:yKWbc.180278$_w.1829644@attbi_s53... I have an old 7 spd 13-23, and an old 7 spd 11-28. Alas, I'd like to have an old 13-28. I have the sprockets to do it, and I just need to drill out the rivets holding most of the sprockets on these cassettes together. However, this page from Sheldon Brown gives me pause: http://www.sheldonbrown.com/k7.html#7cassettes He claims that "Sprockets shown in color are interchangeable with other same-size sprockets shown in the same color." Well, the sprockets listed for the 13-23 "I" cassette are all red and green, and the sprockets listed on the 11-28 "ac/aj" cassette are all black! What does this mean, and will it prevent me from acheiving my 13-28 goal? Thanks. I can't for the life of me get those damn rivets out. I don't have a good enough drill bit, nor a grinding wheel/dremel to at least get the tops off. hx, Kyle |
#5
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question: mixing 7 speed sprockets
And another person discovers the REAL reason behind the creation of
"Hype"glide! LOL!! I have heard, that you can mix sprockets that do not 'metch", however, you will lose shifting performance. Unless someone says otherwise, try it. You already own all the sprockets, you can't lose anything but your time. Let me know if it works, will you? - - "May you have the wind at your back. And a really low gear for the hills!" Chris Zacho ~ "Your Friendly Neighborhood Wheelman" Chris'Z Corner http://www.geocities.com/czcorner |
#6
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question: mixing 7 speed sprockets
I used an angle grinder to remove the rivet heads.
Shifting is OK. |
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