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Hi all,
Installing a Shimano M5100 Deore 11 Spd mech on my daughters build and the B tension seems way off. the current gap between the 42T cassette and jockey wheel in the largest cog is ~40mm whereas it should be about 5-6mm according to various videos?? The B tension screw is wound all the way out so it isn't currently touching the stopper, winding it in any more moves the user jockey further away from the cassette?
The moveable bit of the stopper on the Mech is currently between the B tension screw and the hanger, which is as I think it should be? I'm missing something, but unsure what at the moment.
Pics:
It doesn't work on cassettes with such small cogs, it is for a 51t biggest cog
Ah, that’s annoying!
which version should I be looking for with a 42T cassette then?
It will sort of work on smaller cassettes (I run a 46t ok, 42t might be pushing it). But what you do need is use a longer chain - enough to suit the 51t which isn't actually there. Basically it uses the swing of the mech due to tensioning the chain to move the top jockey closer to the sprocket. If you look the top jockey wheel is a long way behind the top pivot, so the distance between jockey and cassette is massively changed by fore-aft cage angle.
As above - mine was even a bit tricky setting up on a 46t cassette. Needed a fair bit extra length than I originally used.
Ask me why my chain has two quick links in 😁
Hmmm, only have about 5 additional links spare but I’ll pop those in and see if it makes a difference.
She really needs another growth spurt to be comfortable on it anyways so not in a massive rush.
Cheers all.
Was about to buy this but now unsure after the comments.
I'm running SLX 11-46 cassette, XT 32T ring with M8000 XT mech...seems this is designed for use with 51T and a struggle to get it to work with 46T...will the M5120 work better? The link above for it has a long cage - pretty sure mine ATM isn't...when did buying a bloody mech get so complicated?
The 5120 states 1x10 max cog 46 so I assume 1x11 42 would be fine.
For a 1x11 46t I always ran SLX GS cage mechs
Cheers rockthreegozy...so bascially I can't run a cheap Deore with an 11-46 setup? Seems mad...
I don't see why 1x10 and 1x11 would be any different really if the biggest cog is the same. Shimano website is under maintenance but imagine the 5120 would work fine for 1x11 46t.
Imagine there will be plenty who have tried and can feedback..