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Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: zerstorer on April 03, 2024, 09:18:38 PM
Just coat it outside the lip should be fine. What's important is that you ensure the cable is firmly plugged in. Personally I would prefer hot glue or liquid tape since that ensures a waterproof seal and yet is easily torn off when needed.

Chain catcher shouldn't be needed. Do note the FD limits are all adjusted in app.

I finished my bike rebuild last night and I opted to use rubber cement around the cable ports and then applied dielectric grease once it dried. I figure a glob of rubber cement should provide adequate adhesion that's easy to remove and the dielectric grease over that for moisture protection. So after installing the chain catcher, I was able to adequately tune the FD. I was too lazy to remove it though.

First impressions. Everything shifts excellent once setup. Though it was an all-day affair tuning the bike. I'm not sure it was any easier over setting up a cable mechanical bike. The software tuning app is amazing. I've never owned SRAM AXS or DI2, but gear protection and one touch shifting are awesome. I used a quality pair of batteries and battery life seems to be good so far.

On the not so bright side. I'm not fond of the puny RD springs LTwoo and Sensah tend to use. They work, but it's more confidence inspiring how Shimano uses an over engineered spring coil. Also my RD cage looks like it can only accommodate the same size jockey wheels provided. There's no wiggle room to tweak the size. Weight-wise, the ER9 isn't exactly less weight compared to mechanical Ultegra. I either broke even or maybe added a few grams to my bike.
April 04, 2024, 01:32:19 PM 		7
Re: LTWOO ER9 & ERX - Electronic groepsets Yesterday I took the ER9 groupset on it's first ride doing a quick 40km and 600m of climbing. I took it up and down one of the worst road climbs in our city with lots of pot holes, dirt and loose rocks. My aim was to see if I could drop the chain while constantly shifting the ER9 using the whole gear range. The ride included flats, climbing and fast downhill descents. The ER9 worked amazingly well! Shifting was smooth, my cables stayed in-place, I never dropped the chain especially on the fast bumpy downhill and I was totally satisfied with the performance.

There were only a few issues I had when riding. I seemed to accidentally hit the left shift button inadvertently switching to the small chainring while descending in the drops. Also I didn't like that both left FD buttons functioned the same. I'd prefer to have one button dedicated to the small chainring and the other to the big chainring. Without auto trim, it's hard to hear if the chain is rubbing on the FD or not especially when listening to music. The LTwoo grips are a bit too narrow for my taste, I tend to prefer beefier grips. The LTwoo hydro brake calipers work fine, but they're definitely heavy, I might swap them out later on for some lightweight calipers.

Also I think 12 speed is worth switching over to if you plan on buying this groupset. I'm not sure if the smoothness of my ride was attributed to electronic shifting, the wider range cassette, a freshly waxed chain or all of the above? Either way I liked I was able to keep a similar cog range as my 11 speed 11-32t and get the added benefit of the 34t in the low gear.

In regards to gearing I think 50-34t is as big as you can go with an 11-34t cassette with the ER9 without compromising shift performance. It can shift 52-36t + 11-34t, but without a clutch or some sort of cage stiffness adjustment, it feels a bit sloppy. Regarding battery life with lots of shifting due to up and down terrain, I was at 84% from full charge after the ride. I think it'll be a good idea to buy an additional charging cable as backup and maybe bring a power bank if planning a century or more. Also I'm not sure how long the CR2032 batteries will last in the shifters? I think I'll have to pack a few batteries in my saddle bag and dedicated screwdriver moving forward.

Overall my first impressions of the ER9 is very positive. With tax and shipping the whole thing cost me $350 USD for the groupset and it seems the early production kinks have been ironed out (crossing fingers). Also the money saved going with the ER9 can be applied cutting weight elsewhere like a lightweight cassette (which I opted for) or lightweight brake calipers. I still think it's a good idea to have a firm grasp of tuning a mechanical groupset. I don't think I'd jump straight into electronic without knowing how to tune a mechanical bike.
April 05, 2024, 11:09:14 AM 		4
Re: LTWOO ER9 & ERX - Electronic groepsets So far I'm quite pleased with my ER9 groupset. I've been riding it back-to-back with my mechanical Ultegra bike and they're both good in their own ways. In my opinion, it's similar to driving an auto assist car versus a manual transmission. I find installing the ER9 easier than mechanical, but it's faster to tune mechanical once installed. Though I wish there were RD cage options with the ER9/X. The one thing I like with the OSPW Ceramic Speed knock-off I'm using on the Ultegra bike is the 4 levels of spring tension. For someone like me who climbs and descend rough California fire roads the added tension keeps the chain from bouncing without having to use a clutch RD. LTwoo's looser cage tension and smaller spring are a bit bouncy on rougher roads.
April 09, 2024, 01:20:25 PM 		4
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: Serge_K on April 10, 2024, 01:55:31 AM
That's interesting. can you please link to your OSPW? On the er9, if you run 11-34 (native) or 11-36 (with a small cage extender), in small small, there's a lot of chain slack. Mind you, the app has "gear protection" that prevents that, plus you shouldn't cross chain, but if the OSPW acts as some de facto clutch, it becomes a lot less useless as an upgrade, at which point i'm curious to try. And I agree w you, i'm not paying 500$ for that farce.
It then becomes a question of whether there's an OSPW option for the er9/x.

I found with the ER9 50-34/11-34t is the biggest cassette I could run with minimal chain slack. Chain length remained the same from my previous 11-32t when I was running mechanical and I can still safely clear big/big if I go there by accident. Though I'm wondering if there's some sort of Shimano patent for removable derailleur cages? I wonder why LTwoo and Sensah insist on non-removable cages?

Here's the link to that OSPW:
https://www.aliexpress.us/item/3256806117049941.html

If you look closely at the photos you can see the 4 tension hole adjustments.

One more thought: I find gear protection an acceptable trade-off on the ER9/X because I feel small/small is where you'll most likely drop a chain. I also plan on keeping my chain catcher as an added bit of insurance.
April 10, 2024, 09:47:21 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: Avalius on April 11, 2024, 06:16:46 AM
Avoid these cages at all costs. Broke two of these, last one on a cobble section in a race. Pure garbage! Consider yourself warned :)

I've been riding these on some of the roughest urban Los Angeles roads with no issues. I don't ride my road bikes in the rain, only use immersive waxed chains and they work fine. If you crashed, it probably would have happened to the real Ceramic Speed OSPW. It's getting to the point people keep saying everything is junk on AliExpress, but for some weird reason all the junk seems to work for me with proper care and maintenance.

I'm starting to think on the same lines as @Serge_K that most problems people have on here are due to user error/negligence.
April 11, 2024, 09:30:13 AM 		3
Re: What are the recurring big sales on Ali? I didn't remember the Anniversary sale being this good in previous years. I think the next big one will be the June summer sale. There's a chance AliEx might amp up the coupons during some of the smaller sale dates.

https://promossale.com/aliexpress-sale-dates-2024/
April 11, 2024, 11:23:00 AM 		3
Re: Interesting Aliexpress finds! - good deals, interesting stuff, new products etc! Any thoughts on these titanium DT style freehub bodies? I was thinking the HG version would resist bite marks better, though I'm not sure it's worth the premium. Also I'm not sure how beneficial having ceramic bearings would be.

https://www.aliexpress.us/item/3256806289533885.html
April 14, 2024, 09:52:19 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets I've also been riding my ER9 groupset without a hitch and I ride on some rough road terrain and it just works. I have my ER9 gear tuned perfectly, quality replaceable batteries are cheap/plentiful, the high speed shifts are faster than any of my mechanical bikes and gear protection does a great job minimizing chain drops + keeping chain line optimized. On price alone I would probably get another ER9 groupset. No complaints on brakes either, they work fine.
April 14, 2024, 01:28:47 PM 		3
Re: LTWOO ER9 & ERX - Electronic groepsets At this sale price point, I'd consider getting a spare ER9 groupset. I really need to stop looking at AliExpress! lol
April 15, 2024, 11:52:26 AM 		2
Re: Interesting Aliexpress finds! - good deals, interesting stuff, new products etc!
Quote from: pushpush on April 17, 2024, 06:48:07 PM
I've broken chains but never a quick link of any brand or type. I reuse them without any second thought until I retire the chain.

If I break a quicklink tomorrow I'll be singing a different tune!

Same here I've only broken chains, but I've never broken a quick link be it Shimano or even the cheap ones. The SUMC and Rider Ace quick links can be bought in bulk. They seem to have a shorter use life, but you can have like 50 of them for not much money.
April 17, 2024, 07:05:58 PM 		2