Shimano HB-M475
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Shimano HB-M475
Looking for a replacement hub, not sure is anybody else has replaced one with something better. Here are the measurements:
flange diameters: 61mm
over lock nut: 100mm
centre to flange-L: 24.2mm
centre to flange-r: 35.2mm
It is a disc hub, trying to not spend more money on this wheel by buying new spokes.
edit: Maybe the shimano m756? The rest matches basically but, centre to flange-L is 35.8... which puts the spoke about 2mm longer, perhaps a longer nipple on one side?
flange diameters: 61mm
over lock nut: 100mm
centre to flange-L: 24.2mm
centre to flange-r: 35.2mm
It is a disc hub, trying to not spend more money on this wheel by buying new spokes.
edit: Maybe the shimano m756? The rest matches basically but, centre to flange-L is 35.8... which puts the spoke about 2mm longer, perhaps a longer nipple on one side?
Last edited by electrik; 11-18-10 at 06:00 PM.
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Looking for a replacement hub, not sure is anybody else has replaced one with something better. Here are the measurements:
flange diameters: 61mm
over lock nut: 100mm
centre to flange-L: 24.2mm
centre to flange-r: 35.2mm
It is a disc hub, trying to not spend more money on this wheel by buying new spokes.
edit: Maybe the shimano m756? The rest matches basically but, centre to flange-L is 35.8... which puts the spoke about 2mm longer, perhaps a longer nipple on one side?
flange diameters: 61mm
over lock nut: 100mm
centre to flange-L: 24.2mm
centre to flange-r: 35.2mm
It is a disc hub, trying to not spend more money on this wheel by buying new spokes.
edit: Maybe the shimano m756? The rest matches basically but, centre to flange-L is 35.8... which puts the spoke about 2mm longer, perhaps a longer nipple on one side?
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edit:
Using 21.1 it shortens the spoke by .2mm
Last edited by electrik; 11-18-10 at 07:02 PM.
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Shimano has two people editing their document - and they don't communicate with each other:
1. The one doing most of the edits measures to the outside of the flange - not the flange center as most people do. So you'll have to subtract 1.6mm for each flange offset in rough terms to get the "flange center" oriented value. Standard alloy hub flanges are 3.2mm thickness. Campy does the same thing...
They do get hole-to-hole diameters correct - however there are two disc hubs in the Shimano document that are erroneous. I come back again to post those...
2. The other person who does minor edits measures to center of flange correctly - and like the major editor gets the hole-to-hole diameters correct.
=8-)
1. The one doing most of the edits measures to the outside of the flange - not the flange center as most people do. So you'll have to subtract 1.6mm for each flange offset in rough terms to get the "flange center" oriented value. Standard alloy hub flanges are 3.2mm thickness. Campy does the same thing...
They do get hole-to-hole diameters correct - however there are two disc hubs in the Shimano document that are erroneous. I come back again to post those...
2. The other person who does minor edits measures to center of flange correctly - and like the major editor gets the hole-to-hole diameters correct.
=8-)
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5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
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Shimano Dura Ace Front 7900 is listed as hole-to-hole 48.4mm
It's actually 38.4mm
Shimano XT Disc Front M758 is listed as hole-to-hole 68.6mm/64.6mm
It's actually 58.6mm/54.6mm
The Dura Front error came to light as a result of a gentlement here who built one up as part of an upgrade for his two bike - one being a really nice black and white Schwinn.
=8-)
You should be able to swap in any Shimano Disc front that has the same hole-to-hole flange diameters. (FH-M525 for example.)
=8-)
It's actually 38.4mm
Shimano XT Disc Front M758 is listed as hole-to-hole 68.6mm/64.6mm
It's actually 58.6mm/54.6mm
The Dura Front error came to light as a result of a gentlement here who built one up as part of an upgrade for his two bike - one being a really nice black and white Schwinn.
=8-)
You should be able to swap in any Shimano Disc front that has the same hole-to-hole flange diameters. (FH-M525 for example.)
=8-)
__________________
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
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Shimano Dura Ace Front 7900 is listed as hole-to-hole 48.4mm
It's actually 38.4mm
Shimano XT Disc Front M758 is listed as hole-to-hole 68.6mm/64.6mm
It's actually 58.6mm/54.6mm
The Dura Front error came to light as a result of a gentlement here who built one up as part of an upgrade for his two bike - one being a really nice black and white Schwinn.
=8-)
You should be able to swap in any Shimano Disc front that has the same hole-to-hole flange diameters. (FH-M525 for example.)
=8-)
It's actually 38.4mm
Shimano XT Disc Front M758 is listed as hole-to-hole 68.6mm/64.6mm
It's actually 58.6mm/54.6mm
The Dura Front error came to light as a result of a gentlement here who built one up as part of an upgrade for his two bike - one being a really nice black and white Schwinn.
=8-)
You should be able to swap in any Shimano Disc front that has the same hole-to-hole flange diameters. (FH-M525 for example.)
=8-)
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when i first saw that chart, i felt like an idiot for measuring hubs by hand in the past. but, come to find out they're not accurate measurements? I'm all about the measuring again. Thanks, mr rabbit.
To the OP: it's a front hub. I'd just get a new front hub, just like the old one. What killed the hub? It may be cheaper/easier to just buy a new m475, and swap it's guts into the old hub's shell. Of course, if the shell/flange was damaged, that won't work out so well... FWIW, it is often possible to "upgrade" a lower-end shimano hub buy buying a more expensive shimano hub and using the nicer dustcovers/cones/bearings on the old shell.
-rob
To the OP: it's a front hub. I'd just get a new front hub, just like the old one. What killed the hub? It may be cheaper/easier to just buy a new m475, and swap it's guts into the old hub's shell. Of course, if the shell/flange was damaged, that won't work out so well... FWIW, it is often possible to "upgrade" a lower-end shimano hub buy buying a more expensive shimano hub and using the nicer dustcovers/cones/bearings on the old shell.
-rob
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when i first saw that chart, i felt like an idiot for measuring hubs by hand in the past. but, come to find out they're not accurate measurements? I'm all about the measuring again. Thanks, mr rabbit.
To the OP: it's a front hub. I'd just get a new front hub, just like the old one. What killed the hub? It may be cheaper/easier to just buy a new m475, and swap it's guts into the old hub's shell. Of course, if the shell/flange was damaged, that won't work out so well... FWIW, it is often possible to "upgrade" a lower-end shimano hub buy buying a more expensive shimano hub and using the nicer dustcovers/cones/bearings on the old shell.
-rob
To the OP: it's a front hub. I'd just get a new front hub, just like the old one. What killed the hub? It may be cheaper/easier to just buy a new m475, and swap it's guts into the old hub's shell. Of course, if the shell/flange was damaged, that won't work out so well... FWIW, it is often possible to "upgrade" a lower-end shimano hub buy buying a more expensive shimano hub and using the nicer dustcovers/cones/bearings on the old shell.
-rob
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-rob
ps-replacing the whole hub is a great idea, if the cup's race is pitted...
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Is the current hub missing any parts, or are you just unhappy with the unsealed design of the m475? The m576 isn't much different; all shimano hubs are unsealed cup/cone jobs. That being said, the late-model xt rear hub on my LHT is effing awesome, and i've yet to take it apart for service. Been quite a few miles, too...
-rob
ps-replacing the whole hub is a great idea, if the cup's race is pitted...
-rob
ps-replacing the whole hub is a great idea, if the cup's race is pitted...
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The M756 or XT hubs as well as the XTR Hubs differ in one key area in addition to a little better seal. They have Boron coating in the bearing race. This is an ultra hard coating and extends the service life of the higher end Shimano hubs. You can find this oating in the Ultegra and Durace hubs as well.
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I'm guessing this is a rear hub.
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Joshua caught my mistake - it's HB-M525...I wish Shimano has used FH for front hub and used another designation for rear hub...such as RH for example...
...
=8-)
...
=8-)
__________________
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
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Just curious--why are you replacing the hub? Did it get damaged somehow? Seems like one usually wants to replace the rim first...
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=8-)
__________________
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life