Hitec HS-5245MG VS. HS-225BB
I was wondering witch of these two servos I should get for my new mini 8T? They seem to have similar specs, however the 225 is considerably cheaper. Any thought on these two. I have savor in all my other RC vehicles, however none of my extra savor servos fit the mini.

There is a reason for the price difference. The 225bb is both plastic geared and analog. Whereas the 5245mg is metal gear and digital. So two different beasts.

Done HS-5245 it is!

if you want the ultimate mini servo, check out our HS-7245MG:
HS-7245MH High Voltage, High Torque, Metal Gear, Coreless Mini Servo | HITEC RCD USA

With the coreless motor in the 7245, you will get better performance and longer life.

Thanks Billy, maybe for one of the Xrays, but its for my little Mini 8T. I don't need that good of a servo.

You can never have too good of a servo!

I have two HS-7940TH servos that have bad gears in them. Will the gear set for the 7945 or 7950 fit in these servos? What's the difference with them? The picture looks identical for them.
Thanks

That's great. I listened many users complaining about plastic gears. They usually strip on the crash, while metal ones don't.

Yes, but you will change the gearing for the output shaft. The 7940 gearing is high speed, low torque. The 7945 is a mix of both speed and torque, and 7950 trades speed for massive torque. The only difference between the 7940, 7945, and 7950 is the gearing, otherwise they are all identical.

Thanks for the feedback! Nice to know you can change this servo from speed to torque with just a gear set.

The 7940th is super unreliable ive blown two motors in them, i have a hard time swallowing they are the same other than gearset.

Repeated failures in the same application is due to using the incorrect servo for the job, not because of a reliability issue, especially when it comes to the motor. The 7940, 7945, 7950, 7980, and 7990 all use the same motor. Even some of the 8XXX series servos used the same motor.