Which engine mount inserts

[myrcbud]

Couple of questions I m hoping I can get answered here. I’m looking to put a 54/23 gear combination in my 5b. Would I be correct in saying I need #19 engine inserts? Figured the 5t stock gearing is 58/19 with a #19 inserts. 58+19=77 & 54+23=77 so I’m concluding I need #19, right? Also what are these 19.5 and 18.5 inserts for?Hopefully someone here can straighten me out here.

 

[jimbo1]

this is what is recommended for the blackbone losi gears. info taken from a online shop.

might help.

56T Spur - 20T pinion/18T insert, 21T Pinion/19T Insert, 22T Pinion/20T Insert
54T Spur - 22T pinion/18T insert, 23T Pinion/19T Insert, 24T Pinion/20T Insert

 

[myrcbud]

These aren’t blackbone gears, just gears I got from eBay. Interesting though and confirms what I thought. #19 it is. Also did a little digging and found out that the .5 inserts are for the 5t 2.0. Different spur gear.

 

[Losi125]

I think the .5 inserts maybe for when the gears get worn a bit

 

[myrcbud]

The .5’s come stock on the 2.0

 

[DougStar]

Losi 5b and 5t v2 have 5 inserts and come stock with 20 tooth inserts