11 on an 8

[KM2]

How many cogs of an eleven cassette would go on an 8 cassette hub?

[rjb]

I think all 11 will fit if Shimano or one of its clones. The 8 speed Shimano freehub is the same width for 8,9,10,11 speed cassettes.
No idea about Campag freehubs.

[Sum]

A 11 speed MTB casette should fit on a Shimano 8/9 speed freehub. Most 11 speed road won't without modification (I'm not certain about the wider range road cassettes).
https://sheldonbrown.com/shimano-cassette-bodies.html

[cyclop]

The crucial parameters are :making sure the big ring isn,t too close to th e fork and,secondly,the lockring has two or more complete turns and thirdly ,there is no play in the sprockets. If there is,this would indicate the lockring has bottomed out thus requiring an additional spacing washer between freehub and cassette.Hope this helps.P.S. if you do have to put any shim washers in, it is essential to reset the high-low stops so the rear mech won,t foul the spokes with possibly disastrous consequences.

[rogerzilla]

A 11 speed MTB casette should fit on a Shimano 8/9 speed freehub. Most 11 speed road won't without modification (I'm not certain about the wider range road cassettes).
https://sheldonbrown.com/shimano-cassette-bodies.html

The 11sp MTB one fits because the bigger cogs can overhang the freehub on the inside. 11sp road hubs are best avoided as the dish is preposterous with a 130mm spacing. The spoke tension ratios are 1:0.45, meaning you have to overtighten the RH spokes, increasing the risk of pull-through on weak rims, or leave the LH spokes unacceptably slack.

[cyclop]

The crucial parameters are :making sure the big ring isn,t too close to the spokes and,secondly,the lockring has two or more complete turns and thirdly ,there is no play in the sprockets. If there is,this would indicate the lockring has bottomed out thus requiring an additional spacing washer between freehub and cassette.Hope this helps.P.S. if you do have to put any shim washers in, it is essential to reset the high-low stops so the rear mech won,t foul the spokes with possibly disastrous consequences.

[mattsccm]

Even with a 135mm spacing 11 road won't go on the 8/9/10 freehub. However many sold as such will take 11. These are, in my experience , non Shimano, Chinese things. Excellent.
Sticking an 11 speed cassette on an 8/9/10 freehub can be done in two ways. One is machine the back of the cassette to let it slide on a bit further. 1.86mm does the trick. The other way is the opposite. Take that meat off the splines until the cassette fits. Alloy free hubs are easy, Steel takes longer. I have done this with an angle grinder and a file to finish but a Dremel is neater. The latter is a once only job , the former means cost for each cassette.
I now treat hubs like rims that I want to fit tubeless tyres to. They all work ! I have about/at least 8 pairs of wheels in the shed that are not, by design 11 speed or tubeless compatible. They all are runnig 11 speed tubeless perfectly.

[KM2]

So likely that 10 of the 11 would fit, use an 11 chain etc etc

Without mods.

[NickJP]

Even with a 135mm spacing 11 road won't go on the 8/9/10 freehub.

The 11-speed 105 and Ultegra 11-34 road cassettes will fit on 8/9/10-speed freehubs, as the large cog overhangs to the inside in the same way as MTB cassettes. The Shimano part numbers are HG700 for 105 and HG800 for Ultegra.

See https://bike.shimano.com/en-EU/product/ ... 00-11.html.

[KM2]

I would like to use individual cogs and spacers, so the assumption should be, no overhang by the large cog.

[Sum]

The difference in stack between a 11 speed MTB and road cassettes is 1.85mm, the former comes with a 1.85mm spacer so it will fit on both 8/9 speed freehub and 11 speed road freehub e.g.
https://dassets.shimano.com/content/dam ... 1-4329.pdf
https://dassets.shimano.com/content/dam ... 0-4330.pdf

So if you are fitting a 11 speed road cassette onto a 8/9 speed freehub you will need to shorten it by at least this much. Removing a spacer and a spocket should be more than enough, in fact you will probably need to add a spacer at the back.

[mattsccm]

Sorry. I was thinking of normal road gearing not the whoppers. Dunno why. 4

[KM2]

The idea was to use a cassette, eg Miche 11, and see how many cogs would go on a ShImano 105.
Try to remove chainrings at the front as the person has some difficulty juggling rings and cogs.

[Sum]

Why was you thinking of adapting a 11 speed cassette to fit a 8/9 speed hub? Does the person have 11 speed shifters?

According to this article, Shimano 10 speed has the same/similar sprocket pitch and thickness as 11 speed MTB.
https://bike.bikegremlin.com/1232/bicyc ... bility/#10
I haven't tried it though. I came across the article when trying to work out how much the reduction in stack would be if a single sprocket and spacer was removed from a 11 speed cassette.

[KM2]

It may be that the best way forward would be to use the rear mechanism, change the spaces on the cassette and buy some type of a changer, gripshift or ShImano.