Where to get rear brake calipers for 1988 formula (Page 2/2) Shamelesscrimes MAY 24, 04:09 PM Any possibility for upgrading our way out of this situation? I don't mind buying a set here in 2023, but if it's this hard now, imagine in 2028. I'm sure the person who originally designed the equipment was clever, but surely someone with a modern education could come up with a bracket that lets us use some ubiquitous caliper and maintain parking brake functionality? fieroguru MAY 24, 05:35 PM quote Originally posted by Shamelesscrimes: Any possibility for upgrading our way out of this situation? I don't mind buying a set here in 2023, but if it's this hard now, imagine in 2028. I'm sure the person who originally designed the equipment was clever, but surely someone with a modern education could come up with a bracket that lets us use some ubiquitous caliper and maintain parking brake functionality? The fundamental issue is that the Fiero brake system was designed completely different than every other car on the road, including their rear brake caliper size. The Fiero started life as a parts bin car with a Chevette front suspension in the front and a Citation front suspension moved to the rear (without rotating it 180 degrees). The calipers they chose to use at the very start were essentially the same size front/rear as they were both based on front calipers. When the 88s came along, they kept the caliper pistons the same front and rear and that is what makes the Fiero brakes different than all other cars. Most cars run a larger piston area caliper in the front than the rear to get a gross bias adjustment. This means that nearly all rear calipers from other makes/models have a smaller piston area than the stock 88 Fiero rear caliper (48mm). You can find oodles of alternative rear calipers with parking brakes around the 38mm size, but that would cause a rear brake reduction of over 30% and no one who understands brake systems would want that. The universe of rear brake calipers that have 48 mm pistons (or slightly larger) is very, very small. Of that group the ones with a compatible parking brake setup is infinitesimal. I have a huge database of rotor and calipers from all makes/models and have spent hundreds of hours looking for the unicorn and haven't found something I would be happy with yet. Every couple of years I go down the rabbit hole and add more rotors and calipers to my database as new models come out every year. Maybe someday the right caliper will be made... Until then, every 88 Fiero enthusiast should have a spare set (or two) of calipers on the shelf for future maintenance needs. pmbrunelle MAY 24, 06:45 PM quote Originally posted by fieroguru: The universe of rear brake calipers that have 48 mm pistons (or slightly larger) is very, very small. Of that group the ones with a compatible parking brake setup is infinitesimal. I have a huge database of rotor and calipers from all makes/models and have spent hundreds of hours looking for the unicorn and haven't found something I would be happy with yet. Every couple of years I go down the rabbit hole and add more rotors and calipers to my database as new models come out every year. Maybe someday the right caliper will be made... If you didn't see my banjo bolt thread, have a look at this: https://www.fiero.nl/forum/Forum2/HTML/144809.html