Shimano chainrings different thicknesses - please mike your rings
08-14-07, 12:14 PM
#1
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Shimano chainrings different thicknesses - please mike your rings
Apparently the following isn't boilerplate to keep you using Shimano parts:
And the part numbers are different for what is apparently the same part:
It's more than that — Shimano chainrings are different thicknesses. I just miked two 42T rings: one is 1.13mm, the other is 0.80mm. That's quite a difference! The thickness of the ring determines where it is in relation to the other rings, so a thinner middle ring on a spider cut for a thicker one will be closer to the big ring and farther from the small, affecting shifting. A spacer corrects that, which is why some cranksets have spacers. Unfortunately, spacers are not available.
The thing is, there is no indication on the ring as to what crankset it fits! If you're buying a replacement ring, you have no way to tell whether you've gotten the right part.
--------------------------------------------------------------
So I'd like to start a mini-project here on the BF Bicycle Mechanics forum. Let's find out what thicknesses Shimano uses for what cranksets. We'll put the results in a sticky, Mods willing. Please answer these questions:
Oh, and if you have a source for chainring spacers, please PM me.
Originally Posted by Service Instructions
Be sure to use only the FC-xxxx chainrings. If any other type of chainrings are used, the distance between the chainrings will be incorrect...
Y16T 9A420 - FC-6503 42T
Y16X 98010 - FC-5504 42T
Hmmm. I wonder why? Could it be the finish?Y16X 98010 - FC-5504 42T
It's more than that — Shimano chainrings are different thicknesses. I just miked two 42T rings: one is 1.13mm, the other is 0.80mm. That's quite a difference! The thickness of the ring determines where it is in relation to the other rings, so a thinner middle ring on a spider cut for a thicker one will be closer to the big ring and farther from the small, affecting shifting. A spacer corrects that, which is why some cranksets have spacers. Unfortunately, spacers are not available.
The thing is, there is no indication on the ring as to what crankset it fits! If you're buying a replacement ring, you have no way to tell whether you've gotten the right part.
--------------------------------------------------------------
So I'd like to start a mini-project here on the BF Bicycle Mechanics forum. Let's find out what thicknesses Shimano uses for what cranksets. We'll put the results in a sticky, Mods willing. Please answer these questions:
What is the original crankset or ring part number? E.g. FC-6503 or Y16T 9A420. If you're not sure, supply what info you can.
What is the type/tooth count? E.g. A-42T. The type should be marked on the part, for instance "A-52-42-30".
What is the date code? The date code is a small, two-letter (not number) code stamped near the other markings. For instance, "CF" (June 2004) or "YJ" (Oct 2000).
What is the ring mounting thickness? E.g. 0.08mm. You may have to remove the ring to get this. Measure at the surface around the bolt hole. Inches or millimeters is okay.
Is there a spacer between the ring and the spider? How thick?
Does the ring have a counter-bore for the bolt or retainer shoulder?
Describe the finish of the ring. That is, the color and texture of the surface. For instance, the 6503 ring is a nickel color, and textured. The 5500 ring is a silver (redder than the nickel) and smooth.
Tell the BCD. Just to keep things straight. Here is how to measure.
--------------------------------------------------------------Oh, and if you have a source for chainring spacers, please PM me.
Last edited by DMF; 08-14-07 at 05:25 PM.
08-14-07, 03:33 PM
#2
So what did YOU do to it?
Join Date: Jul 2007
Location: Chicagoland
Posts: 299
Bikes: 2006 Fetish Penna, 2014 Fuji Cross 2.0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
And for those who are weight obessive.. the thinner ones are lighter.
08-14-07, 05:15 PM
#4
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by nerobro
And for those who are weight obessive.. the thinner ones are lighter.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
08-14-07, 05:19 PM
#5
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by Treefox
Would this be the whole Type-A vs. Type-B thing?
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Last edited by DMF; 08-14-07 at 05:28 PM.
08-15-07, 10:12 AM
#6
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Here are some chain ring spacers, though they are too thick for my particular need. Nice to see that Branford is back!
Here are spacers and an application chart. They sell only to dealers.
Here are spacers and an application chart. They sell only to dealers.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Last edited by DMF; 08-15-07 at 10:37 AM.
08-15-07, 01:33 PM
#7
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Here's the accumulated results:
Code:
model BCD type code date thick mm spacer c/bore? finish
--------------------------------------------------------------------------
Dura-Ace
FC-7900 130 A-53 interchangeable with FC-6700
130 B-53
130 B-52
130 ?-42
130 ?-39
FC-7950 130 ?-50
130 ?-34
FC-7800 130 A-53 1F3 98040
130 A-54 1F3 98250
130 A-55 1F3 98260
130 A-42 1F3 42000
FC-7800 130 B-50 1F3 98010
130 B-52 1F3 98020
130 B-53 1F3 98030
130 B-39 1F3 39000
FC-7800 130 E-56 1F3 98270
130 E-44 1F3 44000
FC-7803 130 D-52 1G5 98140 interchangeable with FC-6603,4
130 D-39 1G5 98130
92 D-30 1G5 30000
FC-7701 130 A-53 16P 9A530
130 A-42 16P 42000
FC-7701 130 B-53 16P 9B530 CH 1.55* N Y matte nickel
130 B-41 16P 41000
130 B-39 16P 39000 CG 1.33* N Y matte nickel
FC-7701 Triathlon
130 ?-54 16P 98030
130 ?-55 16P 98040
130 ?-56 16P 98050
130 ?-42 16P 42020
130 ?-44 16P 44000
130 ?-45 16P 45000
FC-7703 130 D-53 1EL 98030 CH 1.55* N Y matte nickel
130 D-39 1EL 98020 BL 2.10* N Y matte nickel
74 D-30 1EL 30000 BI 1.10 1.185 N matte nickel
Ultegra
FC-6700 130 B-53 flagged interchangeable with FC-7900
130 B-52
130 B-39
FC-6703 130 ?-52
130 ?-39
92 ?-30
FC-6750 110 F-50 1LL 98010
110 ?-34 1LL 34000
FC-6600 130 B-53 1G3 98040
130 B-52 1G3 98030
130 B-39 1G3 39000
FC-6601
FC-6603 130 D-52 1G4 98030 flagged interchangeable with FC-7803
130 ?-39 1G4 98020
74 ?-30 1G4 30000
FC-6604 130 D-52 1JP 98010 flagged interchangeable with FC-6603
130 ?-39 1JP 98020
74 ?-30 1JP 30000
FC-6650 110 ?-50 1JR 98010 flagged interchangeable with FC-5650, FC-R600
110 ?-34 1JR 34000 flagged interchangeable with FC-R600
FC-6500 130 A-53 16T 98030
130 A-42 16T 42000
FC-6500 130 B-53 16T 98020 ZL 1.625 N Y textured nickel
130 B-53 AG 1.625 N Y textured nickel
130 B-52 16T 98010
130 B-39 16T 39000 ZK 1.125 N Y textured nickel
130 B-39 AH 1.125 N Y textured nickel
FC-6503 130 A-52 16T 9A420 CH 1.625 N Y textured nickel
130 A-42 16T 9A420 CF 1.125 N Y textured nickel
74 A-30 16U 30000 CH 1.125 N Y textured nickel
105
FC-5600 130 B-53
130 B-52
130 B-50
130 ?-39
FC-5603 130 D-50
130 ?-39
74 ?-30
FC-5650 110 F-50 1JL 98020 GD 2.87 N N black anodized? painted?
110 F-34 1JL 34010 GE 2.86 N N black anodized? painted?
FC-5500 130
FC-5501 130 A-53
130 A-42
FC-5501 130 B-53 1DG 98030 BD 2.84 N Y black anodized
130 B-52
130 B-50
130 B-39 16V 39100 BC 2.00 N N black anodized
FC-5502 130 same gearing flagged interchangeable 'B' with FC-5500, FC-5501
FC-5503
FC-5504 130 ?-52
130 ?-42
74 ?-30
FC-5505 same gearing flagged interchangeable 'B' with FC-5503, FC-5504
Tiagra
FC-4503 130 D-50 1HJ 98030 GA/FJ 2.70** N N flat silver grey (alum material)
130 D-39 1HJ 98020 GA/FJ 2.90 N Y flat aluminum (alum material)
74 D-30 1HJ 30000 FF2/FI 1.80 N N matte/gloss steel? (steel)
interchangeable w/ Sora FC-3403
Sora
FC-3403 flagged interchangeable 'B','B','A' w/ Tiagra FC-4503
2200
FC-2200
FC-2203
A050
FC-A050
Non-Series
FC-R700 110 ?-50 1H0 98050
110 ?-34 1H0 34000
FC-R600 110 F-50 1HS 98020 EJ 4.67 N Y brushed alum
110 F-34 1HA 34000 EK 2.86 N Y brushed alum
34T (only) flagged interchangeable 'A' w/ FC-4550
FC-R550 130 B-53 1HZ 98030
130 B-52 1HZ 98020
130 B-50 1HZ 98010
130 ?-39 1HZ 39000
FC-R553 130 D-50 1J0 98020
130 ?-39 1J0 98010
74 ?-30 1J0 30000
FC-R450 130 B-52 1JH 98020
130 ?-39 1DM 39100
FC-R453 130 D-50 1H9 98020
130 ?-39 1H9 98010
74 ?-30 1H7 30000
FC-4550 110 F-50 1HA 98040
110 ?-34 1HA 34000
unknown
"Shimano 9-spd SG"
130 A-42 YJ 0.80 - N smooth silver
SLX
MC-660 104 AA-44 1KF 98060 ?/GB 2.90** N N matte/semi black (alum material)
104 AA-32 1KF 98040 FL1/GA1 1.90*** N Y nickel silver steel, matte black plastic front, shiny black plastic back
64 AA-22 1KF 22000 GA/GC 1.90 N N semi black (steel)
flagged interchangeable with FC-M770,FC-M970
32,22 also w/ FC-T661, 22 w/ FC-M810-2,FC-M815-2
RX-100
FC-A550 but all rings probably replacements
Tracer 130 A-53 -- 1.185 N Y brushed alum
Tracer 130 A-39 -- 1.185**** N N brushed alum
Shimano 74 A-30 CF 1.125 N Y textured nickel
unknown tandem left side
110 38 QH/H0? 3.55 N Y polished alu
* Measurements made on assembled crank.
** Teeth are offset outboard
*** "teeth centered on about 2.00mm" =? offset inboard
**** Teeth are offset 0.25mm inboard
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Last edited by DMF; 06-05-09 at 10:01 AM. Reason: Add 105, R600, tandem
08-15-07, 06:02 PM
#8
Senior Member
Join Date: Nov 2003
Location: SE Minnesota
Posts: 12,275
Bikes: are better than yours.
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
https://www.loosescrews.com/index.cgi...d=668929319232
08-17-07, 10:44 AM
#9
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Dura-Ace added to chart.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
09-03-07, 11:58 PM
#10
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Surely someone has calipers and a few spare moments.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
09-04-07, 07:01 AM
#11
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353
Bikes: 1987 Bianchi Campione
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 23 Times
in
17 Posts
Originally Posted by DMF
Surely someone has calipers and a few spare moments.
09-04-07, 07:28 AM
#12
Over the hill
Join Date: Mar 2006
Location: Los Angeles, CA
Posts: 23,819
Bikes: Giant Defy, Giant Revolt
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 718 Post(s)
Liked 793 Times
in
474 Posts
Did you measure the thickness where they are bolted or under the teeth? Many chainrings have recesses which may affect your calculations as to where the ring will sit.
__________________
It's like riding a bicycle
It's like riding a bicycle
09-04-07, 08:01 AM
#13
Senior Member
Can you post a picture of where you are taking your measurements from? I don't have any Shimano-brand chainrings to check but the chainrings I have measured seem to be much thicker than what you've measured. They all seem to taper down in thickness near the teeth and the teeth measurements I have taken range from 1.9 to 2mm.
09-04-07, 09:23 AM
#14
Senior Member
Why would a difference in thickness make any difference? I have an 80s vintage Sugino crankset that shifts perfectly with a 105 brifter and front der.
__________________
Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1
Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1
09-04-07, 04:35 PM
#15
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by operator
I work in a shop - which other rings do you want thicknesses for?
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
09-04-07, 04:39 PM
#16
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by urbanknight
Did you measure the thickness where they are bolted or under the teeth? Many chainrings have recesses which may affect your calculations as to where the ring will sit.
It is possible that the teeth might be offset, but we don't have the gear to measure that accurately so we'll have to assume that the teeth are centered.
It's more important to get the caliper square to the surface than to worry about jaw orientation (something you don't have to worry about if you use a micrometer).
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
09-04-07, 04:45 PM
#17
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by San Rensho
Why would a difference in thickness make any difference?
Originally Posted by DMF
The thickness of the ring determines where it is in relation to the other rings, so a thinner middle ring on a spider cut for a thicker one will be closer to the big ring and farther from the small, affecting shifting
....
[also] there is no indication on the ring as to what crankset it fits! If you're buying a replacement ring, you have no way to tell whether you've gotten the right part.
....
[also] there is no indication on the ring as to what crankset it fits! If you're buying a replacement ring, you have no way to tell whether you've gotten the right part.
Originally Posted by San Rensho
I have an 80s vintage Sugino crankset that shifts perfectly with a 105 brifter and front der.
Uhhh... That's nice.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
09-04-07, 05:07 PM
#18
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353
Bikes: 1987 Bianchi Campione
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 23 Times
in
17 Posts
Originally Posted by DMF
Likewise if you're trying to ID a loose one.
Uhhh... That's nice.
09-04-07, 08:39 PM
#19
Bottecchia fan
Join Date: Aug 2003
Location: Colorado Springs, CO
Posts: 3,508
Bikes: 1959 Bottecchia Milano-Sanremo (frame), 1966 Bottecchia Professional (frame), 1971 Bottecchia Professional (frame), 1973 Bottecchia Gran Turismo, 1974 Bottecchia Special, 1977 Bottecchia Special (frame), 1974 Peugeot UO-8
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
Originally Posted by DMF
Surely someone has calipers and a few spare moments.
09-05-07, 09:17 AM
#20
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Well, I just started with Shimano, but no reason we can't expand the project. (No point in including proprietary mounting systems like an asymmetrical spider or weird BCD.)
Waddya got?
Waddya got?
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
09-10-07, 03:15 PM
#21
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Something else occurs to me. It would be nice to know if rings are interchangeable between different "speed" versions of the same group. For instance, are Ultegra triple rings interchangeable between 6503 and 6603? The type codes are the same (A).
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
10-20-07, 08:57 PM
#24
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
I Want Everything!
PLEASE
Look at it this way. I probably won't try to use a 7400 ring on my 7700. But some poor sod with a 7400 might like to know if he can use an (available) 7700 ring when his wears out.
I'm frankly surprised that no one has done this investigation before.
Don't worry if your input data isn't complete. Every little bit helps.
PLEASE
Look at it this way. I probably won't try to use a 7400 ring on my 7700. But some poor sod with a 7400 might like to know if he can use an (available) 7700 ring when his wears out.
I'm frankly surprised that no one has done this investigation before.
Don't worry if your input data isn't complete. Every little bit helps.
Last edited by DMF; 10-20-07 at 09:04 PM.
04-15-09, 02:36 PM
#25
Elitist Troglodyte
Thread Starter
Join Date: Jun 2006
Location: Dallas
Posts: 6,925
Bikes: 03 Raleigh Professional (steel)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Back to the top! for those that haven't seen it.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
Stupidity got us into this mess - why can't it get us out?
- Will Rogers
