Author Topic: Ltwoo ER9 FD won't shift inboard enough w/ Senicx PR3 Crank  (Read 2421 times)

Mokora

Ltwoo ER9 FD won't shift inboard enough w/ Senicx PR3 Crank
« on: November 02, 2025, 01:55:07 PM »
I'm running in circles over here :(

I´ve build up a second LCR017-D with ER9 v3 and an Evosid 24mm alu spindle crankset. The dub-style locknut loosened, it creaked and also needed 8mm of spacers since it was made for both 68 and 73mm bb shells.

I then ordered the Senicx PR3, which should perfectly fit the T47 68mm BB without any spacers. I reused the Evosid 2x Chainrings, which are 3bolt. But while I had the LTWOO FD tuned all the way to the outer maximum with the 8mm spacer setup, now, the  ER9 front derailleur cannot shift down to the small chainring, even with the lowest limit in the app. Only by adding a 2mm spacer (not intended via the senicx instructions) did it shift, but even in the biggest cog/small ring, the chain still rubs the inner rail of the FD.

I also tried a Magene P505 Crankset with the 2x QED Chainring (from my other LCR), which has a 1.5mm longer spindle compared to the senicx. Here, everything shifts well.
Would the setup possibly work with the senicx chainring instead of the evosid? I thought there is no difference in chain line offset on 2x chainrings...
https://de.aliexpress.com/item/1005008361096328.html?spm=a2g0o.tesla.0.0.28e6ojEmojEmL3&pdp_npi=6%40dis%21EUR%2175%2C33€%2132%2C39€%21%21%21%21%21%40211b612517621094163554578e3063%2112000044719687873%21btfpre%21%21%21%211%210%21&afTraceInfo=1005008361096328__pc__c_ppc_item_bridge_pc_main__KzG1jIZ__1762109416471&gatewayAdapt=glo2deu


Please help me understand this mess!




« Last Edit: November 02, 2025, 01:56:46 PM by Mokora »

jonathanf2

Re: Ltwoo ER9 FD won't shift inboard enough w/ Senicx PR3 Crank
« Reply #1 on: November 02, 2025, 04:50:57 PM »
Use Shimano chainrings even if you need to use a 4 bolt asymmetric to GXP 3 bolt adapter. Shifts much better than that crappy EVOSID chainring.

Mokora

Re: Ltwoo ER9 FD won't shift inboard enough w/ Senicx PR3 Crank
« Reply #2 on: November 02, 2025, 05:15:51 PM »
Use Shimano chainrings even if you need to use a 4 bolt asymmetric to GXP 3 bolt adapter. Shifts much better than that crappy EVOSID chainring.

https://de.aliexpress.com/item/1005009314588334.html?spm=a2g0o.productlist.main.5.5d1a193dmOsy65&algo_pvid=e3f8482c-5952-4a07-b121-4847f84fca97&algo_exp_id=e3f8482c-5952-4a07-b121-4847f84fca97-4&pdp_ext_f=%7B"order"%3A"21"%2C"eval"%3A"1"%2C"fromPage"%3A"search"%7D&pdp_npi=6%40dis%21EUR%2129.42%2110.59%21%21%21236.30%2185.06%21%402103835e17621252223092183e5461%2112000048718096487%21sea%21DE%212750104567%21X%211%210%21n_tag%3A-29919%3Bd%3Ab70a2bfa%3Bm03_new_user%3A-29895&curPageLogUid=edfUXydoSmJ0&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005009314588334%7C_p_origin_prod%3A#nav-review

using this adpater... from evosid?  8)

jonathanf2

Re: Ltwoo ER9 FD won't shift inboard enough w/ Senicx PR3 Crank
« Reply #3 on: November 02, 2025, 05:41:31 PM »
using this adpater... from evosid?  8)

The adapter doesn't matter, the chainring is what makes the difference when it comes to shift performance.

mashiro2004

Re: Ltwoo ER9 FD won't shift inboard enough w/ Senicx PR3 Crank
« Reply #4 on: November 03, 2025, 06:35:20 AM »
Hi, I had the same problem with the Senicx PR3 and Ltwoo ER7 derailleur. The 11-speed shifting was poor, while the 12-speed shifting was a disaster, with terrible gear changes.
I tried a lot, but all to no avail. Thanks to @jonathanf2, I also tried various adapters, and finally figured out it was the chainrings.
I then bought some Zrace chainrings for the Shimano crankset because the original chainrings were worn out. The gear changes were definitely better, but after two rides the teeth on the Zrace were completely worn out.
I got a refund from Alix and then ordered the original Shimano chainrings. Now the gear changes are excellent.
If you have 12 speeds and are European, rather than going with Aliexpress cranksets, I recommend this one:

https://www.bike-components.de/en/Shimano/FC-RS520-Crankset-p89707/?o=1000349732-black-172-5-mm-34-50&delivery_country=IT&upid=google&utm_source=google&utm_medium=cpc&utm_campaign=21150995039&utm_content=&utm_term=&gclid=CjwKCAiAwqHIBhAEEiwAx9cTeRz4Iyn_755dAh1PgMEqANYcvcXU0i6IdMfpr5YZDtSt8OXIbyPp8xoCLYMQAvD_BwE

But I have to tell you the honest truth: On my gravel bike I always mount a Senicx PR3 crankset and with the Sensah HRD it's perfect....