A Planted Technology low seat bracket for the Mazda MX-5 on the NB chassis, 1998 to 2005. Part number SB255.
The low version. The standard height is SB109.
Why low is what most NB track users want
Headroom. An NB is small inside and the standard position is high relative to the screen. Put a helmet on and you are against the header rail, and if the car has a roll bar it gets worse rather than better.
It also improves how you sit relative to the wheel, which on a car with steering this direct is worth having.
The NB’s own improvements
Stiffer shell than the NA, and the later 1.8 cars gained a six speed gearbox and a limited slip differential on some specifications. It is the more usable of the two early MX-5s while remaining light.
Practical
NBs rust round the sills and floors in the same places NAs do. Get the carpet up and look properly before you spend anything.
The car is light, so ask us about the lighter GRP and composite shells.
Have you written anything useful for my car?
Yes: Corbeau PSR Seats In A Mazda MX-5 Mk1: The One Bracket That Takes Them, and Top 5 Bucket Seats For Your Mazda MX-5 Mk4 (ND), And One Kit That Fits Them All. Those are written around the same car, from real fittings and customer questions, so they are worth a look before you decide.
Will this fit my car?
This frame is made for the Mazda MX-5 Miata. Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.
Which seats does it take?
Check the bolt pattern in the specification against your seat. The Compatible seats tab above lists what bolts straight on. If your seat is not listed, tell us what you run and we will confirm the fit.
Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on Planted frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.