GRX 1x11- running a 46T rear cassette?

worked fine for me fine as is. i ran a sunrace 11s 46T on GRX 11s for 2 years no issues

i really miss that 46t on my replacement bike, i dont believe sram force axs allows for the perfect granny gear.

I went 42t cassette with a 36t Wolftooth chainring. Works fine, quick and easy to swap chainring when required (for winter road riding, for example).

Good to know on both ends! 80 quid for a WT ring or 50ish for an SLX 11-46 11 speed. I think I've some old 11 speed cassettes in the spares bin. Might stick one on this evening just to try it out before deciding which way to go.

Thanks both

I've recently tried the XT cage bodge on my wife's GRX812 and it currently works pretty well with an 11-51 Deore cassette, so I would imagine 11-46 would be fine.

I just followed this guys video with parts sourced from SJS Cycles. Less than £25 (plus the cassette obvs).

I'm using the Garbaruk rear derailleur cage and an 11-46 cassette, very pleased with it. I am using it on 11 speed sram rival but they also do the Shimano equivalent

Thanks again- both those look like viable solutions. I certainly already have a lightly used 11-51 11 speed cassette. So it'd just be a cage and a new chain... Vid was very helpful, looks a mod even a mechanical savage like me could do 🙂

+1 for the xt cage hack. Took no more than 20 mins and now running a garabruk 11-50T cassette with no bother at all.

Didn't get to it tonight as my entire evening was spent dealing with a tyre left way too long without fresh sealant. On that rim is the cassette I need to change, but first I had to unseat a sealant glued tyre, remove as much of the "stan's snake" from inside it before my will to live finally ran out, and then wrestle it back onto the rim before an aftermath of cleaning up various liquids including some fresh over excited sealant, shards of wire wool and the aforementioned will to live.

Seeing how bad the rear one was, I'm going to have to tackle the front before trying the mech hack.

There was a moment when I looked at my drill and thought "I'm sure I have some kind of very abrasive attachment for that somewhere' before I reeled myself back in. 

I know I an now off my own topic. But I'm just testing photo functionality honest!

Front tyre was just as bad. Man when that sealant grabs the bead it does not want to let go. ThumbsofSteel nearly failed me and I was off to get the big tyre lever (aka 'big spade the bead breaker').

Second tyre I just removed the Stan-Snake and cleaned up the rim very carefully. Found a couple of thorns so it was worth doing. Maybe try the cassette later but at the moment I can't bring myself to look at that wheel 😉

Oh and the first photo is from last night and that's a 0,0% beer. Although I could have happily swigged a few proper ones!

Three years is too long not to change the sealant 🤣 

mmm last reply never made it! Lost in (cyber)space 🙁 

just checked and I'm running grx 812 rear mech on the gravel bike with 36t chainring and 11-46 cassette. never had any problems with it. 

Interesting thanks... I may go and experiment this evening.

I have a di2 shifter with an xt mech with a 46T cassette. Works a treat.  

Posted by: dufresneorama

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just checked and I'm running grx 812 rear mech on the gravel bike with 36t chainring and 11-46 cassette. never had any problems with it. 

Same here. No problems

Yep that works- that cassette is not the right one but it was the closest to hand. 11-46, didn't even have to change the stops or find a longer chain, I might stick a couple of links in or even a new chain but it's within limits of the mech I reckon.

It would need a bit more indexing, but works with zero changes. So it's run with that, go for the hack and fit my 51 or stick with the 46 and find a cheap-ish (if such thing exists) smaller front ring. Quick test fit of my kit, just need to decide if I'm going to buy that Tailfin solution... it looks so good especially with a dropper but it's a wodge of cash!

https://www.ebay.co.uk/itm/365255343480?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=u8wmfaroqwi&sssrc=4429486&ssuid=K5fGryJvQAe&var=634953707130&widget_ver=artemis&media=COPY

I have just purchased a 38t of this....they do down to 36t.

I'm sure there'll be a a GRX option

Ta- if I can get a cheap 38T and run 11-46 with no mods, this seems to be the lazy mans approach to having enough gears. I'm still tempted by that XT cage mod tho as I do have a barely used cassette doing nothing.

Be interested to.see how you get on...The Wolftooth link is about £35 which might be cheaper than a new rear cage unless you can get a secondhand one I suppose.

I - or one of my riding buds - may have a broken XT mech but with a good cage.  I've had a few products from Wolftooth over the years tho and they've all worked well/been of good quality.

Might be cheaper alternatives

https://www.aliexpress.com/item/1005006851108171.html?src=google&pdp_npi=4%40dis%21GBP%2134.05%2133.39%21%21%21%21%21%40%2112000038513097064%21ppc%21%21%21&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=en1005006851108171&ds_e_product_merchant_id=5352132608&ds_e_product_country=GB&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=17859500389&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=CjwKCAiA-Oi7BhA1EiwA2rIu2zSvVY8JTyDeTHTMgTk1KXATcIwq6p54GyKuFrbSm1qrwTfAa8a35BoCOKEQAvD_BwE

Posted by: stacee jaxx

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e how you get on...The Wolftooth link is about £35 which might be cheaper than a new rear cage unless you can get a secondhand one I suppose.

The two cage sides cost me around £24 in total from SJS, plus p&p.  I should probably actually fit them some time 🤨 

I

Posted by: stacee jaxx

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I have just purchased a 38t of this....they do down to 36t.

I'm sure there'll be a a GRX option

I've just bought one of those chainrings for Mrs LJ as they seemed to be the only 120 BCD option for the FSA chainset on her Marin Gestalt and its 42t ring. With the dinner plate cassette, she now has a 38-51 bottom gear, which very much suits her sit'n'spin preference. This entire exercise stems from one road climb from Symonds Yat up to the carpark at the Rock 😆 

I came down there last night, but via the steps 🙂 I can imagine that climb would have most mortals desperately stabbing the shifter! 

The same happened to me on the climb out of Church Stretton. Which is one of THREE (and not even the worst) on the 2nd day of the tour.  

Thread resurrection:) Finally done - well a mate did after I furnished him with the correct parts - seems to shift fine, bit grumbly on the 51 and obviously bigger gaps than at 42, but I'll take that! Cost was about £50 for the new cage and a new, longer, SLX 1 speed chain. Chainring isn't worn enough to need changing.

Not done a proper ride yet, but so far looks a good solution. So thanks to those who gave advice, especially @limbojimbo who pointed me at that YT video.

Oh I forgot, changed the jockey wheels for some spare Superstar ones I had knocking about to fit the 12 speed cage. Didn't include those in the costs, no idea where and when I bought those!

You're more than welcome👍 . I initially found the larger sprockets a bit grumbly but a lot of fiddling with the b screw seemed to fix that. It's still not perfect but luckily, Mrs LJ is much less of a princess when it comes to shifting performance than me.