I have the LH-18A1P model that needs a new belt and it requires punching or prying the tray open on the drive just to insert a CD. The one in my Xbox Original v1.6b needs a new belt as well as that sometimes doesn't open very well.

It's hard to find a belt as I can never find one at all. Plus, they can be generally the wrong size.

i get them on a fisical store that sells electronics.
the belts are very common, and even found on ebay https://www.ebay.co.uk/itm/38mm-Rubber-Drive- … D-/391691718412

there are a ton of different diameters, you just take out the one you got on the drive, {it will be really messed up and will not have a circle shape}
try to rectify it with some tame to measure the diameter and buy it online. maybe ebay or mouser must have them since they are common to repair optical drives for audio, and each brand or model has a different diameter belt

https://www.amazon.com/SODIAL-Useful-Cassette … d/dp/B01K1DLSCY

bjwil1991 wrote:

It's hard to find a belt as I can never find one at all. Plus, they can be generally the wrong size.

It's impossible to find the correct size. Yes. The kits won't always have the correct size.

And what is the correct way to measure? Circumfrence? Inside diameter? Outside diameter?

Aliexpress has some offerings:

https://www.aliexpress.com/premium/cassette-t … iewCP=y&catId=0

They have packs of mixed sizes for cheap, so ordering one probably will help to enhance your chances of finding a suitable size.

Seem to need a 23mm sized belt. 20 is too tight. And 25 is too loose. The 25 I have now seems to be stretched out, so 23 seems right.

Or maybe 25, depending on how it's measured.

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I think I may have found a suitable 25mm OD replacement.