LTWOO RX hydro sets

[anzolin]

Anyone running a GR9 groupset with a large cassette?

I'm running one with a 46T cassette. It seems like the tension is too low in the smaller cogs, and when you freewheel the weight/inertia of the cassette keeps pushing the chain round causing a lot of slack and dropped chains.

Something to keep in mind if anyone is eyeing this groupset up.
I'm going to put a GRX derailleur on and see if it resolves it.

I have a friend who is using the GR9 with a Shimano HG-601 chain and Deore M5100 11-51 cassette and everything is fine with this configuration, it was a matter of making fine adjustments. Follow the video in PT-BR:



In my case, I use the GR9 with two 46/30 chainrings and an 11-34 cassette and on heavy gravel sometimes the chain jumps a little hitting the frame, what I did was adjust the cage to be more taut, tightening the screw of image:

[anzolin]

If you bought it from AliEx, I'd contact the store you bought the groupset from and see if they can send you replacement shifters. If not, try contacting Ltwoo directly and see if they'll replace it for you.

Thanks for the guidance. Despite having purchased the groupset more than 3 months ago on Aliexpress, the seller will send me a new one as this replacement part does not yet exist, not even Ltwoo Official has it.

[anzolin]

Store I bought from (80 Designer store) sent me a replacement GR9 shifter after I couldn't get it to shift right and I just had to pay shipping.
Contact the vendor and see if they can help you. If you're stateside, I have a spare right shifter I can probably get that paddle to you if you cover shipping.

Thanks for the guidance. Despite having purchased the groupset more than 3 months ago on Aliexpress, the seller will send me a new one as this replacement part does not yet exist, not even Ltwoo Official has it.

[00Garza]

Thanks for the guidance. Despite having purchased the groupset more than 3 months ago on Aliexpress, the seller will send me a new one as this replacement part does not yet exist, not even Ltwoo Official has it.

Glad they're helping you out. Any idea what caused the break? Seems like a strange location for it to fail.

[00Garza]

Anyone running a GR9 groupset with a large cassette?

I'm running one with a 46T cassette. It seems like the tension is too low in the smaller cogs, and when you freewheel the weight/inertia of the cassette keeps pushing the chain round causing a lot of slack and dropped chains.

Something to keep in mind if anyone is eyeing this groupset up.
I'm going to put a GRX derailleur on and see if it resolves it.

Running an 11-46 sunrace cassette and haven't had any issues at all.

[anzolin]

Glad they're helping you out. Any idea what caused the break? Seems like a strange location for it to fail.

I couldn't identify the reason for the part breaking because the equipment's usage mileage is only 400 kilometers, it was very strange and I didn't apply that much force and there wasn't even a fall. Two mechanics also evaluated it and didn't know. I think I was the first to report this problem.

When a replacement part appears, I'll buy a spare so as not to have the bike sitting idle.

Despite the problem, I really liked the groupset (I use the R9 for the shifter and the GR9 as a rear derailleur), I have another gravel bike with the Shimano GRX and the Ltwoo goes well.

Thanks again.

[jonathanf2]

I think it's been mentioned on this forum that LTwoo used riveted ABS plastic for the left and right shift levers. Constant applied pressure makes it susceptible to breaking. I wouldn't even bother with LTwoo mechanical levers. You'd be better off using Sensah Team Pro 11 or 12 speed shifters with LTwoo derailleurs. In fact I just built a bike with this exact same configuration (Sensah shifters, LTwoo front/rear derailleurs).

[lazywalrus]

I have a friend who is using the GR9 with a Shimano HG-601 chain and Deore M5100 11-51 cassette and everything is fine with this configuration, it was a matter of making fine adjustments. Follow the video in PT-BR:

In my case, I use the GR9 with two 46/30 chainrings and an 11-34 cassette and on heavy gravel sometimes the chain jumps a little hitting the frame, what I did was adjust the cage to be more taut, tightening the screw of image:

Thanks for the tip, maybe it's a skill issue on my end. Or possibly made worse by a slightly draggy freehub.
In any case I got an ok deal on a grx812 and that's completely fixed the issue.
Maybe I'll try with the gr9 again in the future when I have time to play have a closer look at it.

Edit:
Actually looking at photos of the gr9 a bit more closely, I'm wondering if there's an two versions?
I've got the first one with no cylindrical part. The second one has it, which looks a lot like some form of clutch/damping.

[00Garza]

Edit:
Actually looking at photos of the gr9 a bit more closely, I'm wondering if there's an two versions?
I've got the first one with no cylindrical part. The second one has it, which looks a lot like some form of clutch/damping.

Correct. The first was the purely mechanical version. The one with the cylindrical tensioner was when they went hydraulic. Looking at pics on Ali, there might even be a newer version GR9 with a more streamlined looking rear mech.
https://www.aliexpress.us/item/3256805399421120.html

[SupraSan]

There is a road hydraulic group L-twoo R9 2x11 for gravel.

I want to install an MTB cassette and, accordingly, a rear derailleur with a damper

But there are no 11-speed GR9 rear derailleurs for sale.

Only visually identical 10-speed GR7 and 12-speed GRT are sold (https://aliexpress.ru/item/1005005496048529.html), as well as MTB L-twoo T9 at 11 speed, which looks exactly the same (https: // aliexpress.ru/item/1005005981719066.html)

Are the rear derailleurs R9, GR7, GR9, GRT, T9 compatible with each other in terms of pull ratio?

[pavlo.k]

Hello. Looking for some advice for setting up RX rear derailleur. I recently built a bike with ltwoo rx groupset and I can't get it to shift at even somewhat acceptable level. Im using shimano 105 12sp cassette and a kmc chain with it. The shifting is ok from the middle of the block to the largest cog but on the smaller cogs, especially 4 smallest ones it's just total crap in both directions. You have to perform 2 shifts in order for chain to move. Sometmes it starts grinding with a single shift, sometimes not, sometimes it shifts(moving to larger cog seems a bit easier). I can get it to shift ok in one direction by adjusting the cable tension but then it stops working on a larger cogs. Derailleur hanger is straight. I have a full internal cable routing with probably doesn't make shifting better but i tried moving the cable by hand and theres barely any resistance in the housing. I tried using grx rx400 derailleur for test which should be compatible and it also shifted like crap. Would appreciate any suggestions,  I'm at the point of giving up and buying a 105 groupset instead

[00Garza]

Hello. Looking for some advice for setting up RX rear derailleur. I recently built a bike with ltwoo rx groupset and I can't get it to shift at even somewhat acceptable level. Im using shimano 105 12sp cassette and a kmc chain with it. The shifting is ok from the middle of the block to the largest cog but on the smaller cogs, especially 4 smallest ones it's just total crap in both directions. You have to perform 2 shifts in order for chain to move. Sometmes it starts grinding with a single shift, sometimes not, sometimes it shifts(moving to larger cog seems a bit easier). I can get it to shift ok in one direction by adjusting the cable tension but then it stops working on a larger cogs. Derailleur hanger is straight. I have a full internal cable routing with probably doesn't make shifting better but i tried moving the cable by hand and theres barely any resistance in the housing. I tried using grx rx400 derailleur for test which should be compatible and it also shifted like crap. Would appreciate any suggestions,  I'm at the point of giving up and buying a 105 groupset instead

It might be your shifter that's bad. This sounds similar to what was going on with my new Ltwoo gr9 groupset. Tried it with a dura ace shifter and it shifted perfectly. Had to have the vendor ship me a new shifter.

[tez]

Just installed a Ltwoo RX road 2x12s on my bike and mostly everything is dialled in.

Issue I am having is the front derailleur. It shifts up and down ok, however I just cant get rid of any chain rub in the extremes (not while cross chaining).
It's running a 11-34t cassette with a Shimano R7100 50-34 crank.

When I have it on the small chain ring and largest sprocket (lowest gear), I've adjusted the low limit screw to have the inner plate just off the chain, then when I put it in the large chain ring and small sprocket (highest gear) the chain rubs on the derailleur. If I tension up the cable to move the derailleur outboard more, then it rubs on the smallest gear combo.
(High limit has been set to not overshoot the shift too)

Any ideas?

[pavlo.k]

Hello. Looking for some advice for setting up RX rear derailleur. I recently built a bike with ltwoo rx groupset and I can't get it to shift at even somewhat acceptable level. Im using shimano 105 12sp cassette and a kmc chain with it. The shifting is ok from the middle of the block to the largest cog but on the smaller cogs, especially 4 smallest ones it's just total crap in both directions. You have to perform 2 shifts in order for chain to move. Sometmes it starts grinding with a single shift, sometimes not, sometimes it shifts(moving to larger cog seems a bit easier). I can get it to shift ok in one direction by adjusting the cable tension but then it stops working on a larger cogs. Derailleur hanger is straight. I have a full internal cable routing with probably doesn't make shifting better but i tried moving the cable by hand and theres barely any resistance in the housing. I tried using grx rx400 derailleur for test which should be compatible and it also shifted like crap. Would appreciate any suggestions,  I'm at the point of giving up and buying a 105 groupset instead.

ok, so an update on my problem that might be helpful for people having similar problems. I've been playing around with it for a while, trying different cables, oiling cables, and playing with adjustments. It was shifting somewhat acceptable. still really sluggish on the smaller sprockets especially when shifting into a larger sprocket. What did the trick for me in the end was swapping the guide pulley for a larger 12T narrow-wide one. The shifting is perfect now, very fast and precise.  Link to a pulley wheel
https://a.aliexpress.com/_EQ7dTx9

[jcr]

Since this groupset has been out for a while now, anyone have any long term update? Any major or concerning issues (for example the electronic version seems to have a lot of issues now).

Was thinking of going mechanical and like a previous poster wanted to do a 2x gravel setup but can I use the RX setup with a different derailleur or even a Shimano MTB derailleur?