I used to think my old SRAM GX 12-speed cassette was damaged because of the “shark-fin” looking teeth and the irregular shapes on some cogs. I assumed the shifting issues I was having were caused by worn-out or deformed teeth.
But now that I bought a brand-new GX cassette, I compared both side by side… and honestly, they look surprisingly similar. The new one also has asymmetrical teeth, different profiles, and shapes that don’t look “perfectly uniform.”
So I’m not sure anymore if my old cassette is actually worn out. I got this bike second hand, so I’m not sure how many chains the previous owner went through or how much wear the cassette already had.
Here are the photos of the old cassette:
Photos of the new one in comparation:
by 3nvxt
2 Comments
Put a fresh chain on. If it skips in the frequently used gears, its worn out 👍
Your old cassette looks perfectly good for a few thousand more miles. Where exactly is the skipping happening 🤔 I was convinced my rear cassette was off until I gave it to someone else, and they pointed out that all of the slipping was happening on my big ring upfront. I would start looking at that. I would also look at adjusting the B screw tension and finally if all that fails, take it to your local bike shop and make sure to tip your mechanic. 👨🔧👨🔧👩🔧