Need help finding out what size the rear brake piston is!

Technical Area Wheels, Tyres & Brakes
1

Hello!

  1. My model of MX-5 is: 2002 NB MK 2.5, 1.6
  2. I’m based near: Romania, Bucharest
  3. I’m looking for technical help or recommendations on: Rear brake caliper piston dimension

My rear calipers have started leaking at the handbrake linkage and I want to rebuild them the following week. My local parts store is selling kits that are made for 32mm and for 35mm (piston I believe) and I’m not sure which one is the correct size. Is there any way to check the dimension without removing the caliper (and piston) before ordering the parts kit?
TIA!

2

If you can measure the brake disc diameter ILMotorsports list them accordingly.

see MX-5 NB-FL Seal kits / Pistons

hth

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3

As you have the 1.6, you’ll have the 251mm rear disc, so I think the smaller piston.

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4

Thanks! I’ll take the wheels off tomorrow and I will check the disc diameter, just to be sure.

5

Exactly this, the Sport 1.8 cars had 35mm rear pistons in the calipers, the 1.6 and normal 1.8 cars had 32mm