XIDA Race Coilover 90-05 Miata MX5

Name: XIDA Race Coilover 90-05 Miata MX5
SKU: SPM-Xida
Price: 2329 USD
Availability: InStock

$2,549.00

949 Racing coilover suspension kit for cars

Performance coilover suspension with orange top mounts

Product Description

XIDA Race coilovers 90-05 Mazda MX5 Miata

Features

Single adjustable Compression & Rebound together, 20 step. Full clockwise is full stiff.
Length is optimized for 4~5″ pinch weld heights
Full aluminum monotube construction
46mm double digressive piston
Floating piston internal design
Adjustable height spring perches
Torrington thrust bearings
120mm stroke front, 103mm rear
20mm increase in rear bump travel over OEM
High Pressure nitrogen charged
Spherical bearing lower mounts
2.25″ Swift or Hyperco springs
Total weight with springs and mounts: 8 lbs front, 7 lbs rear (light!)
Damping sweep for front 1300~450 springs, rear 600~250
Velcro-closure waterproof shock covers included

Options:

Dual spring system – Includes Torrington bearings and spring couplers
CNC machined billet aluminum spherical bearing, coaxial perch mounts

Why dual springs? Being a long stroke damper, Xidas require dual springs to make full use of the extra stroke available. A 2000 lb car with the motion ratio of just under 1.5:1 won’t compress a short 700# spring far enough to allow meaningful droop travel with long stroke damper. To get the correct ride height, one must lower the preload collar until the springs have 25-60mm of free play. Without the secondary springs (helper), there is no spring stroke left to push the tire down to remain in contact with the road. Achieving the correct spring rate for competition and high performance use while retaining enough spring stroke would require a 9-11″ long spring. A short main spring combined with flat-wire high rate helper is lighter and more compact than a long single spring. In addition, the Miata doesn’t need 400-800lb springs when at full extension as the contact patch loading is almost nil at that point in the stroke. A much lower rate will work better with that lightly loaded tire. What is called for is a progressive rate spring. Look at any purpose built race car that has more than about 75mm of damper stroke and you’ll see dual springs. Off road and rally cars will often use three separate springs stacked up for a huge spring rate range. We offer the Xidas without the helpers for the Miata owner on a tight budget but the system will do everything better with the dual springs in place. We tested the single spring setup on our local bumpy road course and they worked very well – well enough to be comfortable offering them in that configuration. Guys have been adding high spring rate Ground Control and other coilover sleeves to their Bilsteins and Koni Sports forever with good results so it’s not like it doesn’t work at all. It’s just less than optimum. “Less than optimum” wasn’t in the design criteria for the Xida’s.

Why BCMs: There are a few key benefits. First, when the suspension compresses, the lower shock mount pivots outwards causing a side load on the shock shaft as it deflects the bushings in the OEM tophat. The BCM upper bearing makes that motion smoother, reducing friction and heat in the damper. This could also slightly extend damper seal life. Second, springs do all sorts of fun things when they compress, twisting and bending. With the OE tophat design, the spring has to banana as that lower shock mount pivots outward. Our coaxial mounts allow the upper spring perch to pivot inline with the damper, independent of the body mount making it so the spring doesn’t have to banana. This results in a more consistent spring rate.

If you’re looking for a place to save a few bucks on your Xida setup this is it, but if the $150 upgrade fits in the budget it’s the correct way to build a motorsport suspension system.

Spring rates

22k/11k (1232/616) Hoosier 225/45 ~ 275/35/15
16k/9k (896/504) Race – Track or autocross focused, 40~100tw race or 200tw UHP
14k/7k (784/392) STS – STS autocross class only
12k/7k (672/392) Sport – For high grip street tires, 200tw. Casual autocross or HPDE
10k/6k (560/336) Touring – Street comfort, not for 200tw or race tires.

Xida Reviews

Xida Race instructions Adjusting damping setting

More road racing national championships around the world than any other Miata coilover The Gen2 Xida are built for us by Tractive Suspension (Netherlands) using Swift springs. The exceptional valving sensitivity produces both incredible grip over any paved surface and exceptional ride quality. Despite the surprising streetability, these are purpose built racing dampers intended for use under the most demanding motorsports environments.

Confused about ordering? If you are not sure which spring rate package to order for your project, give us a call or email. We’ll get the system matched exactly to your needs.

How do I set these up? Xidas require some setup to get the most out of them. For Alignment and ride height recommendations, finding the right damping settings, and much more, check out our suspension and brakes category on our tech guide page.

Questions about servicing and maintaining your Xidas? Check out our Xida Maintenance doc here.

**front upper control arm clearance with all brands of coilovers on 01-05 Miata control arms. Click here for more details**

Current Xida – video https://www.youtube.com/watch?v=yEePSL1WYAA

2009-2014 Xida video (discontinued) https://www.youtube.com/watch?v=rgFDJ8T5Gy8

Read Reviews