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Spring Rates for Street Rods & Drag Racing

Our springs are cold wound, chrome silicon wire that is powder coated or chrome plated. All springs are color coded to reflect the pounds per inch when the springs are compressed. All chrome coils are baked per the industry specifications for safety and performance.

All Aldan springs are manufactured in the USA.

Street Rods

Front Rear (lbs./in.)
4 cylinder, v-6 T-bucket, track T 300 160
V-8 (small block) T-bucket, V-6 hiboy roadster 350 180
’29-’32 full fender coupes, “A” sedans (small block) 400 200
’32-’34 sedans, ’35-’36 coupes (small block) 400 250
’35 and up sedans, ’37-’40 coupes (small block) 400 300
Street Rods with big block V8 450#-500# for front shocks

Color Codes: w/white r/red b/blue y/yellow g/green

6 Inch 8 Inch 9 Inch 10 Inch 12 inch
350# y/r 100# w/g
450# w/r 250# b 120# y/g 120# y/g
550# y/b 300# y 220# r 140# r/g 140# r/g
650# b/w/y 350# y/r 250# b 160# b/g 160# b/g
750# b/w/g 400# b/r 300# y 180# g 180# g
450# w/r 350# y/r 200# w 220# r
500# r/w/b 400# b/r 220# r 250# b
550# y/b 450# w/r 250# b 300# y
600# b/w 500# r/w/b 300# y 350# y/r
650# b/w/y 550# y/b 350# y/r 400# b/r
700# y/w 600# b/w 400# b/r
650# b/w/y 450# w/r
700# y/w 500# r/w/b
550# y/b
600# b/w
650# b/w/y
700# y/w

Drag Racing

654 / 659 /
754 / 854
Spring Rate
Total Weight on Front Wheels 658 / 858 /
758 / 658R
Spring Rate
Total Weight on Rear Wheels
200
250
under 800 lbs.
800 – 1000 lbs.
70
80
under 800 lbs.
800 – 1000 lbs.
275
300
1000 – 1100 lbs.
1100 – 1200 lbs.
100
120
1000 – 1100 lbs.
1100 – 1200 lbs.
350
400
1200 – 1500 lbs.
1500 – 1800 lbs.
140
160
1200 – 1300 lbs.
1300 – 1400 lbs.
450
500
1800 – 2000 lbs.
2000 – 2300 lbs.
180
200
1400 – 1500 lbs.
1600 – 1800 lbs.
550
650
2300 – 2500 lbs.
2600 and up
250
300
1800 – 2400 lbs.
2400 and up

SPRINGS – (PURCHASED SEPARATELY)