It's a bit of a diversion from the original post, but I'll add on anyway; I bought a SRM conversion, but the belt only lasted just over 6K miles. I thought I'd tensioned it as per instructions but maybe I had it too tight and it shredded bits of steel fibres, and finally stretched, so as per previous posts^^^^, I've backed off the new one a bit. It's only done ~2.5K miles since then, but seems ok. I haven't run either in grease or oil or anything- totally dry.
Original belt; Synchroflex AT5/420 x 10mm Gen 111 (steel reinforced)
Replacement; Optibelt AT5/420 x 10mm (Polyurethane)- current
I've last week bought a new spare same as current one (except 'made in Ireland'
), so see how it goes.
I bought the last two from the local bearing supply shop, they have to get them in and not as cheap as I'd like, but waddafarque, I have a spare-*dunno*