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[Datsun 1200 encyclopedia]

Leaf Springs

From Datsun 1200 Club

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Category: Rear Axle And Rear Suspension

Datsun 1200 used the tried and true leaf spring rear suspension, which was common among most cars — including American cars — in the early 1970s. Also known as blade springs or cart springs.



Sedan and Coupe use the same leaf-pack.

VB110 Wagon came with heavy-duty spring pack.

The B120 1200 Truck came with standard or optional (heavy-duty) rear leaf springs. Standard was a 4-leaf pack, while optional was a 5-leaf pack with a stiffer spring rate.

55020-H1000 Sedan, Coupe $159 USD
55020-H1400 Van (heavy duty)
55020-G1000 Truck 4-leaf early
55020-G1001 Truck 4-leaf 7510-
55020-G1002 Truck 4-leaf 8504-
55020-G1060 Truck 5-leaf 7804-8503
55020-G1061 Truck 5-leaf 7804-8503 8504-

Ute 4-leaf pack Type 1
leaf-overrider.jpg 21316.jpgAlbum click to view

Ute 4-leaf pack Type 2 (2nd leaf overlaps 1st leaf)
24758.jpgAlbum click to view

Front Shackle, Rear 3-bolt Bracket
174_619c212581f9e.jpgPost click for topic

Rear Shackle is same for all 1200s
24931.jpgAlbum click to view

Front 3-point Mount Plate (Sedan, Coupe)
18675.jpgAlbum click to view

Sedan rear shackle pin bracket
18674.jpgAlbum click to view

Details (truck, Pin front mount)
24929.jpgAlbum click to view leaf-pins.jpg

Truck rear shackle pin bracket
12728.jpgAlbum click to view
Truck front leaf pin
12729.jpgAlbum click to view

Custom adjustable shackles

Spring Specifications

All 1200 springs are: 1110 mm long, 50mm wide

Spring Rate
See Spring_Rates#Rear_Spring_Rate
Spring Eye Diameter
* Coupe, Sedan, Van: 35mm front,  23mm rear
Sedan, Coupe
* 3 leaf: 1 x 6mm thick, 2 x 7mm thick

* 4 leaf std: 3 x 6mm thick, 1 x 13mm thick
* 4 leaf H-D: 2 x 6mm thick, 1 x 7mm thick, 1 x 11mm thick
* 4 leaf: 2 x 6mm thick, 1 x 7mm thick, 1 x 13mm thick
* 5 leaf: 2 x 6mm thick, 1 x 7mm thick, 2 x 10mm thick
Free Camber
* Sedan, Coupe: 109mm +-3
* Van         : 131mm +-5
* Truck       : 118.5 mm 

Laden Camber
* Sedan, Coupe: 11mm @ 192kg
* Van: 11mm @ 295kg
* Truck std 4-leaf: 18.5mm @ 267kg
* Truck HD 5-leaf:  15.1mm @ 376kg
Free Camber 'S'
* Truck: 118.5 mm

6317_51354966421f7.jpgPost click for topic

Leaf Mounting

See also: Shocks#Mounting

B110 mounts leaf directly to metal (unlike B10 and B210 which use rubber-based isoclamp).

Rear axle mounting
24932.jpgAlbum click to view 3772.jpgAlbum click to view 14584.jpgAlbum click to view

Sedan mounting with Vertical Shock bolted to axle tube bracket (coupe, wagon and truck have diagonally-oriented shock bolted to lower spring seat)
9744.jpgAlbum click to view 28724.jpgAlbum click to view 14584.jpgAlbum click to view

B210 mounting uses an Isoclamp, with a rubber pad between the spring seat and leaf
28722.pngAlbum click to view

Spring Seat

H10 Sedan (plain seat without shock stud)

Spring Seat Assembly
Sedan: 55262-H1001 
Truck: 55262-G1000 (RH) 12mm shock Nut wide u-bolt
Van:   55262-H1401 (RH) 12mm shock Nut narrow u-bolt
       55262-H1402 (RH)   (from '73-6)
Coupe: 55262-H1801 (RH)  8mm shock Nut
       55262-H1802 (RH)   (from '73-5)

18451.jpgAlbum click to view

See also: Shock absorbers

G10 B120 Truck large stud for shock + large U-joints
24027.jpgAlbum click to view 27515.jpgAlbum click to view 27516.jpgAlbum click to view

25582.jpgAlbum click to view 25583.jpgAlbum click to view

H18 Coupe small stud for shock
1201.jpgAlbum click to view 174_54d5aa409d1da.jpgPost click for topic

Sedan and Coupe parts
18721.jpgAlbum click to view

B210 coupe
2491.jpgAlbum click to view


6212.jpgAlbum click to view 6211.jpgAlbum click to view 6210.jpgAlbum click to view

55247-H1002 CLIP-rear spring Sedan, Coupe.USA
55240-H1800 Coupe.JPM.early 
55247-H1401 CLIP-rear spring Van, Coupe.JDM.late
55247-G1000 CLIP-REAR SPRING Truck 4-leaf
55247-G1060 CLIP-REAR SPRING Truck 5-leaf 7804- 
Fasteners for U-bolts (Sedan,Coupe,Van,Truck)
08911-64010 NUT-HEX M10 x 1.25 8
08915-14010 WASHER-spring lock 8

14584.jpgAlbum click to view

Ute U-bolts (same M10 diameter but wider spacing for larger axle tube)
24930.jpgAlbum click to view

Ute U-bolts fit over 62 mm axle housings (62 mm inside diameter)
26351.jpgAlbum click to view

Bound Bumpers

Coupe, Truck & Van rear suspension bumper (above the axle housing)
55240-G1900 ASSY-BUMPER REAR AXLE > 55240-H1800 > 55240-H1400
08911-64010 NUT-HEX M10X1.25

6210.jpgAlbum click to view 24926.jpgAlbum click to view

Sedan rear suspension bumper (on the Shocks)
55240-H1001 BOUND BUMPER A
56124-H1001 BOUND-BUMPER B
24801.jpgAlbum click to view

Truck Bound Bumper
174_56c011bf552a9.jpgPost click for topic 11171.jpgAlbum click to view

Torque Arrester

The Torque Arrester (pinion snubber) is a rubber bumper that prevents the leafs from rotating too much under torque input.



18316.jpgAlbum click to view

5 55044-H1001 front upper Sedan, Coupe
  * superseded by 55044-H5001 $4.90 USD
  24085.jpgAlbum click to view
6 55045-H1000 front lower Sedan, Coupe [leaf eye, course] $3.63 USD

24086.jpgAlbum click to view Leaf%20Spring%20Eye%20Rubber%20(55045-H1000).jpg

17 55046-H1000 rear upper $2.27 USD

24927.jpgAlbum click to view

18 55047-H1000 rear lower [leaf eye, plain] $1.22 USD
NOTE: B210 USA uses the same bushes as 1200 Coupe/Sedan.

Wagon & Ute
24922.jpgAlbum click to view

V 55045-H1400 front Van, Truck [leaf eye, fine] $4.25 USD

24924.jpgAlbum click to view

20900.jpgAlbum click to view

20429.jpgAlbum click to view

Ute/Van complete set
24928.jpgAlbum click to view

Make your own

Or, make your own performance bushings per Nissan Competition book:


Or, get stiff aftermarket bushings:

I got in touch with MADDAT.COM and they knew exactly what I was looking for. They had it in stock from Super Pro (yes they're polyurethane), sent them right out, and I received them 8 days later here in Arizona, USA. Tamra from the sales department was easy to work with and very helpful. I would recommend these guys to anyone who needs parts for their 1200. Front spring eye bushing on rear leaf spring
  • Polyurethane bushings (north america): Parbo

Lowering Springs


See also: Lowering

120Y Springs

120Y B210 leaf spring is 1165mm. It is 55mm longer than 1200 B110 (1110mm) and is not interchangeable.

12482.jpgAlbum click to view

B210 use an Isoclamp system which means the bolts are farther apart, even though the leaves are the same 50 mm width as 1200 leaf springs.

B210 Coupe
2487.jpgAlbum click to view 2488.jpgAlbum click to view

B210 Sedan U-bolts (plate has wider spacing than B110)
18491.jpgAlbum click to view


B210 use an Isoclamp system, similar to that used by B10.

Bolt holes 3 inches
174_565973852692c.jpgUpload click to view

Datsun 1000 clamp
19924.jpgAlbum click to view

Alternative Leaf Springs

Composite Leafs - See Suspension_upgrades#Smooth_ride



Unknown adjustable suspension. Does it work well?
11450.jpgAlbum click to view


New leaf springs work very well, but worn leafs don't slide too well.

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This page has been accessed 82,400 times. This page was last modified 18:48, 23 October 2022. Content is available under Datsun 1200 Club.