Ohlins Suspension For 2005-2014 Mazda Miata / MX5 (NC / EC) - MAS MI30 Ohlins Suspension For 2005-2014 Mazda Miata / MX5 (NC / EC) Spring Rate: Front: 70 N/mm // 400 lbs/in. // 7.14 k/mm Rear: 40 N/mm // 229 lbs/in. // 4.08 k/mm