XRAY - Model racing cars

Which ones best to use on the T4?
50mm or 52mm.

Do both fit without problems or additional changes I have to do?

Would like to know before I spend my hard earned money

I ask because info in manual and on seperate leaflet are not the same!

Do I have to use shrink tube? In the manual and in the seperate leaflet it is not mentioned, so I opt for not doing so........

Thnx

They will both fit, but when using the 50mm versions you are more likely to break the spool outdrives, but many say these give more traction at the front end.

I always build the driveshafts as the instructions say, but then put some heatshrink on them to help keep them together if a pin comes loose etc.

Transparent heatshrink is better for this