laura*

Some more data below. Q: Are the high end chainrings really so much thinner than the Tiagra chainrings?


Shimano Tiagra FC-4503
BCD: 130mm
Type: 50 D
Code: Y-1H7 98030
Date: GA (set 1), FJ (set 2)
Thick: 2.70mm (teeth offset outboard) (measured on assembled crankset using depth gauge feature of dial caliper)
Spacer: No
Counter bore: No
Material: Aluminum
Finish: Flat silver grey
Interchange: None listed, but Sora FC-3403 (Y-1H9 98020) lists "B" with Tiagra FC-4503

Shimano Tiagra FC-4503
BCD: 130mm
Type: 39 D
Code: Y-1H7 98020
Date: GA (set 1), FJ (set 2)
Thick: mounting tab about 2.90mm (counter bored to less), teeth positioned as if this was a flat about 2.00mm chainring (measured on assembled crankset - measurements eyeballed)
Spacer: No
Counter bore: Yes
Material: Aluminum
Finish: Flat aluminum
Interchange: None listed, but Sora FC-3403 (Y-1H9 98010) lists "B" with Tiagra FC-4503

Shimano Tiagra FC-4503
BCD: 74mm
Type: 30 D
Code: Y-1H7 30000
Date: FF2 (set 1), FI (set 2)
Thick: 1.80mm (measured on assembled crankset - caliper was able to clamp onto chainring)
Spacer: No
Counter bore: No
Material: Steel
Finish: Matte (sandblast) front, shiny back
Interchange: None listed, but Sora FC-3403 lists "A" with Tiagra FC-4503


Shimano SLX FC-M660
BCD: 104mm
Type: 44-AA
Code: Y-1KF 98060
Date: ?? (set 1), GB (set 2)
Thick: 2.90mm (teeth offset outboard)
Spacer: No
Counter bore: No
Material: Aluminum
Finish: Matte black front, semi-gloss black back
Interchange: "B" with Deore XT FC-M770 (Y-1J1 98010) which then lists "B" with XTR FC-M970 (Y-1H5 98030)

Shimano SLX FC-M660
BCD: 104mm
Type: 32-AA
Code: Y-1KF 98040
Date: FL1 (set 1), GA1 (set 2)
Thick: 1.90mm (counter bored to less)
Spacer: No
Counter bore: Yes
Material: Steel and plastic
Finish: Nickel silver steel, matte black plastic front, shiny black plastic rear
Interchange: "B" with Deore XT FC-M770 (Y-1J1 98020) which then lists "B" with XTR FC-M970 (Y-1H5 98010)
Interchange: Deore LX FC-T661 lists "A" with SLX FC-M660

Shimano SLX FC-M660
BCD: 64mm
Type: 22-AA
Code: Y-1KF 22000
Date: GA (set 1), GC (set 2)
Thick: 1.90mm
Spacer: No
Counter bore: No
Material: Steel
Finish: Semi-gloss black
Interchange: "B" with Deore XT FC-M770 (Y-1J1 22000) which is also used on Saint FC-M810-2 and FC-M815-2
Interchange: Deore LX FC-T661 lists "A" with SLX FC-M660

DMF 

Thanks! I'll edit the chart shortly.

Still looking for data on high-end 10-speed rings.

JanMM

(Another reason for chainring spacers is if you switch from thicker to thinner rings and find that your chainring fixing bolts are loose.)

AEO

ok, I'll bite...

I can get you R600 50/34, 5650 50/34 and 5501 53/39 chainring measurements
can also get you a 110bcd 38T left side tandem timing ring measurement.

will post the info tomorrow.

Booger1

Don't forget to measure the offset also.The teeth are not always centered with the hub.

AEO

no spacers on all

FC-R600
50-F (50-34)
EJ date
4.67mm thickness
y, 2.76mm thickness at sunken lips

FC-R600
34-F
EK date
2.86mm thickness
y, 1.74mm thickness at sunken lips
brushed alu
110BCD

FC-5501 (black 105)
B-53
BD date
2.84mm thickness
2.24mm thickness at sunken lips
black anodized
130BCD


FC-5501 (black 105)
B-39
BC
2.00mm
no counter bore
black anodized
130BCD

FC-5650 (black)
50-F
GD
2.87mm
no counter bore
black anodized? painted?

FC-5650 (black)
34-F
GE
2.86mm thickness
y, 1.74mm thickness at sunken lips
black anodized? painted?
110BCD

tandem left
38T (left side)
QH? H0? date
3.55mm thickness
y, 2.04mm thickness at sunken lips
polished alu
110BCD

AEO

please send me a laser measuring device then. all I have are digital calipers to work with.

DMF 

If you want to go through the exercise, the depth gage at the other end of the calipers is quite accurate enough. Just measure to some point on the tooth, then again to the same point on the other side of the tooth. Any offset should be immediately obvious.

AEO

too late, I already mounted my rings back on my bikes

the 105 outer rings have offset, they're dished to the outside, obviously for chain ramps and to allow more cross chaining room when in the small ring.
the compact inner rings have offset, the teeth are lined up to the inner edge with slight dishing.

DMF 

Added AOE's updates.

AEO, is there a make/model on the tandem ring? And please confirm the 4.67(!) thickness on the R600 ring - quite the thickest we've seen.

trueno92

very cool, i guess this answers the:

"will biopace rings work with a 10sp chain?" question that i had earlier..

DMF 

No, it doesn't.

They will work just fine, though I can't say the same for a 10-speed FD. But that's another topic...

FarHorizon

OK - I just got an icebox load of assorted chain rings. I'll measure & mike them as I get to them. Results posted in chart to follow.

FH

DMF 

Cool! Thanks.