Well i fried mt CB like 2 days ago and my LHS only has 22T ones which i dont want. I found THIS ONE on tower which looks like itll fit a t-maxx but not sure it says ALL traxxas nitro so I'm guessing yes just dont wanna order suttin i can't use.
I fried my clutchbell the other day and it was the stock that came of the TRX .15, I went and bought a 18 tooth from Hobbytown and the bearing wont fit in it. Do the sizes of the bearings change when you go down in teeth.
The spur is not likely to be the cause of the problem. The real cause probably has to do with the mesh you set up. The RRP spur just added to the damage because it was a metal gear with a bad mesh. Always ends ugly.
As for the same clutch bell for all TRAXXAS nitros, the clutch bell is made to fit the TRX 2.5. Since that engine is now the stock engine in almost if not all of their nitro vehicles.