I've had some requests from iceboaters and new landsailer builders on how to put wheels on their craft.
These are medium sized iceboats so this is how I would do it using online parts that are easily available.
1) Rear axle spindles and plates. Buy 2000 lb trailer spindles. They might be labeled as 1 1/2" or 1 1/4". The 1 1/2'' and 1 1/4" is the square or round stub size. the 1" is the actual spindle size to fit a 1" diameter bearing. www.etrailer.com/Trailer-Spindles/TruRyde/TRU97FR.html
Use 3/16" plate to weld the spindle to. If your iceboat has chock cap plates match the size and hole pattern for those. That way you won't have to remove the chocks. Other wise follow the drawing below.
2 ) Buy hubs to match the wheels and spindle diameter. For most trailers in the US with 12' rims they will be 4 on 4 or 5 on 4 1/2.
4 on 4 - www.etrailer.com/Trailer-Hubs-and-Drums/etrailer/AKIHUB-440-2-2K.html
5 on 4 1/2 - www.etrailer.com/Trailer-Hubs-and-Drums/etrailer/AKIHUB-545-2-LFEZ-1K.html
I clean almost all the grease out and replace it with a lighter lube so there is less drag. Don't over tighten the nut.
3) Wheels and tires- I used the standard 12" trailer tire on the rear axle of the ST 49's. Put in 40 lbs for light air and drop them to 25 for heavier air or rougher surfaces. Use Smoothies for the beach. Tires with the least amount of tread work best on dry lake beds. Tires with tread might be a better choice on asphalt due to wear.
12' trailer tire - www.etrailer.com/Trailer-Tires-and-Wheels/Kenda/AM30620.html
Front tire 8" rim - Scooter tire - www.motorcycletire.com/product/HN-K754008.html?fbclid=IwAR2eum2w0bAogX4Ph-M7HSKT10_1IzJR74foq51cUsYOeWEkG1RjDbk6oZU
Front rims - www.gokartgalaxy.com/8-aluminum-spinner-wheels.html?fbclid=IwAR2xUfYLwHpV9o6FDOXY5PCJSGolIgxCln4bBSRwxhpt-_2hSvqKpktcbEw
Buy the precision bearing version.
Tri Star split rims work fine too. You can find both rims at Aircraft Spruce too.
4) Front steering. The basics of the design is to get the king ping angle to intersect with the tire patch as it hits the ground.
See drawing.
