Re: Had a wtf? this morning - Ping AMuzi

On 2/23/2025 11:07 AM, Shadow wrote:

On Sun, 23 Feb 2025 09:28:41 -0600, AMuzi <am@yellowjersey.org> wrote:
 

The bike has 8 gears at the back. The derailleur that broke
was a RD-TX35, designed for 7 gears. Maybe that forced it.
I can get a Shimano Tourney TY300 cheap, around US$ 15, or an
Altus RD-M310L for around US$ 35. (since salaries, pensions etc in
Brasil are roughly 1/10 of British, multiply by 10 to get an idea of
relative prices).
>
PS I have no idea if it's short, long, over under etc. I have
the only Shimano gear in town. Nothing to compare it to. People here
use "Sunrun" and "Yamada" which sell for around US$ 4.
[]'s

Those Shimano prices are comparable to US rates:
>
https://www.amazon.com/Shimano-Tourney-TY300-Derailleur-Standard/dp/B01K5C6F1U

  LOL .$14.96
$38.70 Shipping & Import Fees Deposit to Brazil.
Delivery Thursday, March 20
 But yes, prices are comparable.
  The Shimano Tourney TY300 Rear Derailleur is available in
"standard" and "long" cages(RD-TY300 and RD-TY300-SGS).  How do I
figure out which one would be a good replacement? I'd guess
"standard", because there is nothing saying "long" on mine.

>
not much over currently lowest price sources here.
>
https://cambriabike.com/products/shimano-tourney-ty300-6-7-spd-mtb-rear-derailleur?variant=41153396179126

 

>
Given that it was well used, could well have been just
overall wear.  You set the low gear limit back when it was
less worn, but now all the pins and pivots are sloppy. Only
takes a couple of millimeters more travel to go from normal
clearance to engaged on a spoke.

  I gave it a thorough clean when I replaced the jockey wheels
last year. So I had to re-set the LOW and HI screws. It was pretty
much perfect. Also I was not changing down to the lowest gear when it
broke, it was to the last-but-one. It shouldn't have been anywhere
near the spokes.
So it was probably wear or something my front wheel picked up
and flew back.
I'm more annoyed about the wheel. The spoke ripped a hole when
it came out. A small hole. I don't suppose there is a fix for that?
[]'s

Depending on your own standards, yes it's possible to just add a washer under the head of the nipple.
In the shop, it's a new rim or a new wheel.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971