Datsun 240z Steel & Aluminum Wheels

14″ Steel Wheel found on Series 1 Datsun 240z, The TOPY 14-4.5J Wheel Code /Stamp

The steel wheels were manufactured by TOPY. The 1970 – 1971 Datsun 240z (Series 1) came with 4.5″ wide rims. The code is designated as 14-4.5J, 14″ diameter with a 4.5″ width and a 15mm offset. Rim Offset is the distance the mounting hub is in relation to the center of the wheel. A 15mm positive offset means the mounting hub, where lug nuts contact, is 15mm more towards the outside of rim. Resulting in the center line of rim being moved towards the car 15mm more. Deep dish rims with a negative offset, move the center of rim away from car, causing rims to stick out wider. If you have rims with a negative offset, be careful to check tire to fender clearances. You may need to stiffen your suspension.
The 1972-1973 Datsun 240z (Series 2) had 14-5J wheels that were wider, 5 inches.

Manufacturer = TOPY
Production Date = 10/70
Width = 4 1/2 “
Offset “J” ?? = 15 mm
Diameter 14″

The wheel can be easily identified, there are 9 cutouts. The wheels are painted the same color as the Rear Valvence and Front Grille. The color is a Charcoal Metallic. However, I have seen black enamel and galvanized wheels. These were used from the early Roadsters.

Datsun 240z 260z 280z 280ZX Lug nuts for Steel & Aluminum Wheels

Lug nuts used on the Steel and Aluminum Wheels, from 280ZX FSM by Nissan Motor Corp. The wheel studs are M10 x 1.5, the M is for Metric, the 10 is the diameter in MM, and the 1.5 is the pitch. This is the linear distance between threads. If you have aluminum mags be sure the lug nuts you use, are correct as far as the length of the portion of the lug nut that goes into the recess. There are different lug nuts with different heights for different rims. This is very important!

Aluminum Wheels on a 1971 Datsun 240z, I believe these were manufactured by US Mags.

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