Going from 1.5” to 1.75” calipers

[sea2jet]

I have an EX-2 with Grove 33-5M calipers which are dual 1.5” pistons. Does anyone know the caliper number I would need to go to 1.75 brakes and if they will bolt on with no other modifications or do I need to buy a kit? Thanks…

[Pete D]

The 1.25 and 1.5 calipers have the same torque plate (SP45004-007)
The 1.75 caliper takes a SP45009003 torque plate

So in order to change from the 1.5 to the 1.75, yes, you would need to change the torque plates.

The 1.75 caliper p/n is SP45009-002

parts@cubcrafters.com can provide current pricing and enter an order for you

[sea2jet]

Thanks Pete,
Is there a thicker rotor I should order as well with the 1.75 calipers? I thought I read that when going from the 65 series to the 66 series. If so, do you have that part number and I will order everything at the same time.

[Pete D]

The EX2 will use the same wheel and rotor assembly for any of the Grove brake caliper options (1.25, 1.5 and 1.75)

[Andy]

For light bedtime reading:

https://www.groveaircraft.com/Grove%20122%20Catalog.pdf

[kevino]

I have an EX and did go to 1.75. Found that I needed a new rotor as mine did not have joggle. Cubcrafters was not aware of that. believe it was for the earlier EX. I would call Grove to double check. They are very knowledgeable.

Correct, the earlier wheel kits would need an alternative rotor for 1.75 brakes. The later and current wheels include the disk with the joggle compatible with all the caliper options.