Has anyone had problems with the JITSIE chain tensioner spring (Parts reference JI820-13321N Chain guide spring Race TRS 16-25)

[Elmadriles]

The problem I've encountered is that the spring is not the same size as the original, it has longer pins and a different angle and it doesn't fit into the tensioner arm anchor. I've sent them an email with photos and they tell me they've never had that problem since it's a clone. ALSO THEY SAY IT'S STAINLESS STEEL AND IT'S NOT BECAUSE IT'S MAGNETIC AND STAINLESS STEEL IS NOT. (There are some stainless steel ones that have a slight amount of iron and are slightly magnetic but this isn't the case since iron is very attracted to iron.

(I have the emails sent and their responses, as well as a video showing the spring's magnetism that I can't upload.
Can you tell me how to upload videos?)

Email Jitsie muelle ingles.pdf

[Elmadriles]

Email Jitsie muelle ingles.pdf

[lemur]

Yep, I bought one of those too, it's not bent correctly, ended up sourcing a package of regular assorted coil springs from a hardware store and improvising something that works as good or better to the original.

[faussy]

All types of SS are predominantly iron. You argue it's not stainless because it's magnetic? I would expect a ss spring to be magnetic, because the very act of cold drawing and then tempering makes stainless magnetic...

Edited 10 hours ago by faussy

[lemur]

If we want to get all scientific there a 4 types of stainless steel and it is the chromium content that largely alters the magnetic attraction of the steel and the possibility of nickel added which has a grain that does not make a good magnet, all steel contains iron.

The problem with the replacement spring in question is, they bent it in the wrong place.

[anachronism]

4 hours ago, lemur said:

If we want to get all scientific there a 4 types of stainless steel and it is the chromium content that largely alters the magnetic attraction of the steel and the possibility of nickel added which has a grain that does not make a good magnet, all steel contains iron.

The problem with the replacement spring in question is, they bent it in the wrong place.

What year is your bike? I purchased two of the Jitsie springs in 2020, they fit my 2018 perfect after snapping two of the useless stockers (03012TR100) in 75 & then 25 hours.

Looking at my 2025 right now, it looks like the TRS spring has an extra coil compared to the Jitsie. I assumed TRS was just purchasing the springs direct from Jitsie but looks like they are sourcing their own imitation. The 2025 is a second generation swing arm, maybe TRS monkeyed the hole/pin location for their new spring compared to first generation?

[lemur]

I have a 2021 and a 2023 the replacement spring was difficult to install and broke within a very short time, then I went for the extension type spring as a more reliable alternative and I can source them at a hardware store, so I figure why not just set it up for that type of spring.  If there is no spring the bike does not roll backwards and the tensioner arm binds up.