The 899 has the clutch alloy basket and the steel main gear marked 899 only. They look identical to the 1130 parts. Does anyone know the difference?
There are more differences than I can describe on a forum post.
1130 s use both dry and wet clutches, different clutch plates , different finger baskets , and different centre cassettes that the steel spacer rings engage with.
That is just for starters.
Then the same applies to the 900 s, the LE is dry clutch the rest, Tre and RS are wet , having never had a naked or poggo .
I have no knowledge at all of TNT,s or Trek,s.
The bits that wear ,are the fingers of the basket, the edges of the clutch plates , where they rattle in the fingers,s . The spring cups in the basket where those springs sit and the edges of those cups , through deformation of the hardened spring ends, chewing the ends of those recesses.
The basket casting takes a hell of a hammering.
Just for interest , which springs have broken ? there are two sets of 3, one set heavier with one less coil. They are all 30 mm long and the same diameter.
Where they are in the basket radially is critical. two of the weaker one need to be at 1 and 4 , one weak and one stronger at 2 and 5 and two strong at 3 and 6.
You can see which springs were where by the indentations in the alloy casting .