Inner ring spacers for MT60 chainset ?

[brokenbloodybritain]

In need or some spacers to go between the inner and middle rings of an MT60 chainset.

Does anyone have any idea what thickness I’ll be needing for 8 speed?

 

[mdvineng]

3.5mm rings a bell. measure the thickness of the web between the two outer rings, it should match that, to give equal spacing.

 

[Tootyred]

The spacer sizes are on shimano technical pages...

Or use the box lid! Its just about right. Technically the ring type makes a difference on shimano....but honestly it dont really...

Spaces can be got from st john street cycles is you need them.

 

[mdvineng]

A timely reminder to actually go to the back shed and measure mine instead of using memory, mines old and ever more fallable!
So mine comes in at 4.5mm for the inner to middle and there is no spacer to web for the middle. On some Shimano docs there are two types of spacer , a thicker one for inner to middle and a thinner one for middle to spider web. So as ever there a variations upon a theme out there!

 

[FluffyChicken]

The rings changed
So I guess the spacing changed, not only that the speed changed so bb range changed to for different chainline, all using the same basic crank design.

1988 "Deore II"
https://si.shimano.com/en/pdfs/ev/FC-MT60_BB-MT60-0861/EV-FC-MT60_BB-MT60-0861.pdfThis would be 4.3mm era

1990 "Deore DX"
https://si.shimano.com/en/pdfs/ev/FC-MT60-SG-1091/EV-FC-MT60-SG-1091.pdfThis would be the feck knows, 5.0 alloy / 4.6 steel ?

1993 the final ...
https://si.shimano.com/en/pdfs/ev/FC-MT60-A-1323/EV-FC-MT60-A-1323.pdf we finally get to the standard 5.3mm granny spacer for 'ramped aka SG-X rings' with this crank design.

But steel/alu grannies did change it as it went along, alu often 1mm less depending on design.

Good luck go 7/8 speed, go modern rings, go 5.3mm keep it easy.
or measure it when fitted (7mm or something like that peak to peak)

 

[mdvineng]

So as usual do your own due diligence and measure what you have and adjust accordingly.

 

[FluffyChicken]

Yep, i edited a bit to the end and some more info...

ah iirc it was the onza rings that had a 1mm alu/steel change.

not sure how much half a mm here or there will kill you when it all gets muddy on something that just knocks the chain off and hopes it lands on something, or slams it against the side of another ring and hopes something picks it up and or it bends enough to move over a tooth.