HF3418 - 18 Hole Hub Flange Discs For 3/4" Axle


DIY trike hub flange

Our laser cut Hub Flange Discs will make it easy for you to build your own delta trike wheels and save you time on your project. This Hub Flange Disc is made with 18 spoke holes so that you can build wheels directly onto any 3/4" axle using rims with 36 spokes. The Hub Flange Discs are made of steel and are approximately 1/8 inch thick as required by the plans. Spoke holes are 7/64" in diameter so that standard bicycles spokes can be used.

All Hub Flange Discs are sold as a set of four identical discs.

multiple spoke hole counts

Our Hub Flange Discs come in several varieties with various spoke hole counts and axle hole diameters. Each of our DIY plans offer a recommended axle size and spoke count, but you can certainly change this to suit your design needs or parts availability. For instance, the Aurora Trike can be built using rims with 36 spokes rather than 48 spokes, or the DeltaWolf can be made using a 3/4 inch axle rather than a 5/8 inch axle. Please make sure that you order the correct Hub Flange Disc size for your project.

laser cut hub flanges

To keep costs to a minimum, our Hub Flange Discs are laser cut from flat sheet metal. Each disc will have a small imperfection on the outer edge and inner edge where the laser started cutting out the disc. There is also a mill scale on the surface of the metal that will need to be removed using sandpaper or a sanding disc. Neither of these imperfections will compromise the strength of the disc, and once they are built onto your hubs and painted, the imperfections will be unnoticeable.

cleaning the flanges 1

The surfaces of the Hub Flange Discs are coated with a mill scale at the factory to help protect the metal from oxidation. This coating easily be removed using a sanding disc to prepare the part for painting. The laser cut edges are also somewhat sharp, so they need to be smoothed off using the sanding disc by running it lightly around the edge once.

cleaning the flanges 2

Once the mill scale has been removed from the Hub Flange Discs, the spoke holes will need to be beveled slightly to remove the sharp edges around the holes. This is done so that the spoke exiting the flange is not cut by the sharp edges of the hole. To bevel the spoke holes, use a 3/16 inch drill bit and push lightly into the hole until a small bevel is made.

cleaning the flanges 3

The beveled spoke holes are shown here after running pressing lightly with the 3/16 inch drill bit to remove the sharp edges. The Hub Flange Disc is now ready to be welded to your delta trike axle.

cleaning the flanges 4

Remember, our Hub Flange Discs are sold as a set of four matching discs, and there are several versions available, so please choose the correct number of spoke holes and axle diameter for your project. These discs are manufactured to keep costs to a minimum, so you will need to bevel the spoke holes and prep the surface for painting, an operation that will only take a few minutes per disc.

delta trike axles and hubs

All of our DIY Delta Trike Plans make use of these Hub Flange Discs, which allow you to lace a rim directly to the rear axle. By integrating the flanges directly onto the axles, you’ll save some money instead of needing to have complex and expensive machined hub parts made. Our trike plans also include instructions on how to make these parts from scratch, as well as a drawing that can be sent to a machine shop in case you want to make your own hub flanges. Our goal is to offer parts that save you both time and money when building your own DIY bike or trike project.

This part is a 36 hole rim *alternative* for the following plans :

Allows the use of 36 hole rear rims instead of 48 hole rear rims when heavy load carrying is not required. For loads over 400 pounds, or when using a motor, 48 hole rims will offer the most strength.

Aurora Delta Racing Trike KyotoCruiser Sociable Delta Trike StreetFighter Recumbent Racing QuadCycle LodeRunner2 Tandem Cargo Delta Trike

Aurora Delta Racing Trike
Quantity Needed : 1 Set of 4

KyotoCruiser Tandem Delta Trike
Quantity Needed : 1 Set of 4

StreetFighter Racing Quad
Quantity Needed : 1 Set of 4


LodeRunner2 Tandem Trike
Quantity Needed : 1 Set of 4



LodeRunner Single Rider Cargo Trike

LodeRunner Cargo Trike
Quantity Needed : 1 Set of 4









This part is a 3/4" axle *alternative* for the following plans :

Allows the use of a 3/4" axle in place of the 5/8" axle so that our FDAX34 Freewheel Adpater and DBAX34 Disc Brake Adapter can be used with these plans. Also note that 3/4" pillow block bearings will be necessary.

TimberWolf Suspension Delta Trike DeltaWolf Recumbent Racing Trike DeltaRunner Recumbent Delta Trike

TimberWolf Delta Trike
Quantity Needed : 1 Set of 4

DeltaWolf Racing Trike
Quantity Needed : 1 Set of 4

DeltaRunner Delta Trike
Quantity Needed : 1 Set of 4







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HF3418 - 18 Hole Hub Flange Discs For 3/4" Axle